Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
204
FNUS55 KRIW 211929
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
129 PM MDT Mon Sep 21 2026
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Relatively light winds are expected this afternoon and overnight
across the Dispatch Area, with higher elevations seeing an
occasional breeze. Overnight humidity recovery will be good to
excellent across the Dispatch Area. Minimum relative humidity is
forecast to be 5 to 15 percent higher on Tuesday. Tuesday`s winds
are forecast to be relatively light and from the southwest. There are
also shower and thunderstorm chances across the entire Dispatch Area
Tuesday afternoon and evening.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Relatively light winds are expected this afternoon and overnight
across most of the Dispatch Area. The exception is across Zones 276
and 286 where a breezy east wind is forecast through sunset.
Overnight humidity recovery will be good to excellent across the
Dispatch Area. Similar minimum relative humidity is forecast for
Tuesday, with some locations seeing values up to 5 percent lower
than today. Relatively light winds are forecast again on Tuesday,
with Zone 289 seeing afternoon southwest gusts up to 25 mph. There
are also shower and thunderstorm chances across the entire Dispatch
Area Tuesday afternoon and evening.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Light and variable winds are expected this afternoon and overnight
across most of the Dispatch Area. The exception zones are the
eastern portions of 280, 281, and 300 due to a breezy east wind
beginning around 2000L. Eastern portions of these zones could see
gusts up to 20 mph through sunrise Tuesday. Overnight humidity
recovery will be good to excellent across the Dispatch Area. Tuesday
is forecast to have breezier southwest winds with gusts up to 25
mph. Southern zones will likely see 15 to 20 percent higher humidity
and northern zones will likely see 5 to 10 percent lower humidity
compared to today. There are also shower and thunderstorm chances
across the entire Dispatch Area Tuesday afternoon and evening.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-222130-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......12 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......32 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......4800-5800 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....41-46.
24 hr trend......1 degree cooler.
Max humidity........79-85 percent.
24 hr trend......12 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
east around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......7 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......400-2000 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....47-52.
24 hr trend......5 degrees warmer.
Max humidity........68-74 percent.
24 hr trend......12 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southwest 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....South around 10 mph until 2400, then southwest
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 600-1000 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......4 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......6 percent wetter.
20-foot winds.......West winds around 15 mph until 1500, then
northwest. Gusts up to 30 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 4600-6400 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy. Slight chance of showers. Lows in the
upper 40s. Highs in the lower 70s. Winds generally less than
10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear. Lows 46 to 51. Highs in
the upper 70s. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs 71 to 76.
$$
WYZ283-222130-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......8 degrees warmer.
Min humidity........41-47 percent.
24 hr trend......15 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....East around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph.
Mixing Height.......3400-4800 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....43-48.
24 hr trend......2 degrees cooler.
Max humidity........72-78 percent.
24 hr trend......11 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....East around 10 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....East around 10 mph until 2400, then southwest.
Mixing Height.......800-2800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......4 degrees warmer.
Min humidity........42-48 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......400-1800 ft agl until 1200, then 3200-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....44-49.
24 hr trend......2 degrees warmer.
Max humidity........74-80 percent.
24 hr trend......1 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southwest around 10 mph. Gusts up to 25 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......1000-3000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....64-69.
24 hr trend......2 degrees cooler.
Min humidity........42-48 percent.
24 hr trend......1 percent drier.
20-foot winds.......West winds around 10 mph until 1200, then
upslope/upvalley 5-9 mph. Gusts up to 20 mph.
Ridge top winds.....West around 15 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4200-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH SATURDAY...Mostly clear. Lows 45 to 50. Highs
72 to 77. Southwest winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s.
.MONDAY...Partly cloudy. Slight chance of showers in the
afternoon. Highs around 70.
$$
WYZ285-222130-
South Bighorn Mountains-
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....58-63.
24 hr trend......13 degrees warmer.
Min humidity........56-62 percent.
24 hr trend......35 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......3800-4600 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......2 degrees warmer.
Max humidity........71-77 percent.
24 hr trend......20 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast around 10 mph until 0300, then
southwest. Gusts up to 15 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......7 degrees warmer.
Min humidity........35-41 percent.
24 hr trend......16 percent drier.
20-foot winds.......Southwest winds around 10 mph with higher
gusts.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Poor until 1200, then fair to good.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Slight
chance of showers after midnight. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....45-50.
24 hr trend......3 degrees warmer.
Max humidity........68-74 percent.
24 hr trend......2 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southwest 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......4 degrees cooler.
Min humidity........41-47 percent.
24 hr trend......10 percent wetter.
20-foot winds.......West winds 10 to 15 mph until 1500, then
northwest. Gusts up to 25 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 3600-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH SATURDAY...Mostly clear. Lows 46 to 51. Highs
67 to 72. Southwest winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs 64 to 69.
$$
WYZ281-222130-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......9 degrees warmer.
Min humidity........57-63 percent.
24 hr trend......26 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......4200-4800 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....44-49.
24 hr trend......2 degrees cooler.
Max humidity........81-87 percent.
24 hr trend......9 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
south around 10 mph. Gusts up to 30 mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......10 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......14 percent drier.
20-foot winds.......South winds around 10 mph with gusts to around
25 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......400-1800 ft agl until 1200, then 3600-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Slight
chance of showers after midnight. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....49-54.
24 hr trend......5 degrees warmer.
Max humidity........66-72 percent.
24 hr trend......15 percent drier.
Humidity recovery...Good.
20-foot winds.......South winds 10 to 15 mph with gusts to around
30 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......400-2000 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......3 degrees cooler.
Min humidity........40-46 percent.
24 hr trend......5 percent wetter.
20-foot winds.......West winds around 10 mph until 1200, then
upslope/upvalley 5-9 mph. Gusts up to 25 mph.
Ridge top winds.....West around 15 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH SATURDAY...Mostly clear. Lows 48 to 53. Highs
76 to 81. North winds 10 to 15 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs 71 to 76.
$$
WYZ282-222130-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....61-66.
24 hr trend......12 degrees warmer.
Min humidity........47-53 percent.
24 hr trend......34 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......4400-5000 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....41-46.
24 hr trend......2 degrees cooler.
Max humidity........71-77 percent.
24 hr trend......18 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph.
Mixing Height.......1200-3200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......7 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......400-2200 ft agl until 1200, then 3600-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Slight
chance of showers after midnight. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....44-49.
24 hr trend......3 degrees warmer.
Max humidity........72-78 percent.
24 hr trend......1 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
south around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1000-3000 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....65-70.
24 hr trend......3 degrees cooler.
Min humidity........39-45 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH SATURDAY...Mostly clear. Lows 47 to 52. Highs
77 to 82. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs 72 to 77.
$$
WYZ275-222130-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....60-65.
24 hr trend......10 degrees warmer.
Min humidity........44-50 percent.
24 hr trend......29 percent drier.
20-foot winds.......Southeast winds around 10 mph with higher
gusts.
Ridge top winds.....Southeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......4400-5000 ft agl.
Smoke dispersal.....Fair.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......1 degree warmer.
Max humidity........66-72 percent.
24 hr trend......23 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph.
Mixing Height.......1200-3200 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......5 degrees warmer.
Min humidity........28-34 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......400-2200 ft agl until 1200, then 3400-5400 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
in the evening. Chance of showers through the
night. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....45-50.
24 hr trend......4 degrees warmer.
Max humidity........71-77 percent.
24 hr trend......Unchanged.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....South around 10 mph until 2400, then west.
Chc of wetting rain.Less than 5 percent.
Transport winds.....South around 10 mph until 2400, then west.
Mixing Height.......600-2600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......2 degrees cooler.
Min humidity........38-44 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3800-5800 ft
agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows in the lower 50s.
Highs 77 to 82. South winds around 10 mph.
.SATURDAY...Partly cloudy. Lows in the mid 40s. Highs in the mid
70s. Winds generally less than 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s.
.MONDAY...Partly cloudy. Slight chance of showers in the morning.
Highs around 70.
$$
WYZ276-222130-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....64-69.
24 hr trend......7 degrees warmer.
Min humidity........39-45 percent.
24 hr trend......19 percent drier.
20-foot winds.......East winds around 10 mph with higher gusts.
Ridge top winds.....East around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 15 mph.
Mixing Height.......4800-5400 ft agl.
Smoke dispersal.....Good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....44-49.
24 hr trend......2 degrees warmer.
Max humidity........66-72 percent.
24 hr trend......20 percent drier.
Humidity recovery...Good.
20-foot winds.......Southeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 10 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 2400, then
southwest.
Mixing Height.......1400-3400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....68-73.
24 hr trend......5 degrees warmer.
Min humidity........35-41 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of thunderstorms in the evening.
Chance of showers until early morning. Slight
chance of showers early in the morning. Chance
of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....46-51.
24 hr trend......3 degrees warmer.
Max humidity........63-69 percent.
24 hr trend......4 percent drier.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph and gusty.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.10 percent until 2400, then zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......1000-3000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......2 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......3 percent wetter.
20-foot winds.......West winds around 10 mph with gusts to around
30 mph until 1200, then upslope/upvalley 5-9
mph.
Ridge top winds.....West around 15 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH FRIDAY...Mostly clear. Lows 47 to 52. Highs
74 to 79. Southwest winds around 10 mph.
.SATURDAY...Partly cloudy. Lows in the mid 40s. Highs in the
lower 70s. Northwest winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs 66 to 71.
$$
WYZ287-222130-
Owl Creek Mountains-
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....58-63.
24 hr trend......9 degrees warmer.
Min humidity........46-52 percent.
24 hr trend......21 percent drier.
20-foot winds.......Southeast winds around 10 mph and gusty.
Ridge top winds.....Southeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......3600-4800 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......Unchanged.
Max humidity........65-71 percent.
24 hr trend......21 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1000-3000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......6 degrees warmer.
Min humidity........39-45 percent.
24 hr trend......8 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......400-2400 ft agl until 1200, then 3600-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Chance of showers and slight chance of
thunderstorms in the evening. Slight chance of
showers after midnight. Chance of precipitation
40 percent.
Chance of thunder...20 percent.
Min temperature.....43-48.
24 hr trend......1 degree warmer.
Max humidity........66-72 percent.
24 hr trend......Unchanged.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southwest around 10 mph until 2400, then
downslope/downvalley 4-7 mph until 0300, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......800-2800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......2 degrees cooler.
Min humidity........43-49 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....West around 10 mph until 1200, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4400-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH SATURDAY...Mostly clear. Lows 47 to 52. Highs
69 to 74. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs 66 to 71.
$$
WYZ286-222130-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....57-62.
24 hr trend......7 degrees warmer.
Min humidity........42-48 percent.
24 hr trend......16 percent drier.
20-foot winds.......Southeast winds around 10 mph with higher
gusts.
Ridge top winds.....Southeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......4200-5600 ft agl.
Smoke dispersal.....Fair to good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......4 degrees warmer.
Max humidity........75-81 percent.
24 hr trend......21 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2400, then
west around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 2400, then west.
Mixing Height.......1200-3200 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....60-65.
24 hr trend......2 degrees warmer.
Min humidity........35-41 percent.
24 hr trend......8 percent drier.
20-foot winds.......West winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Fair to good.
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of thunderstorms in the evening.
Showers likely through the night. Chance of
precipitation 70 percent.
Chance of thunder...20 percent.
Min temperature.....39-44.
24 hr trend......1 degree warmer.
Max humidity........76-82 percent.
24 hr trend......6 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
west around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.15 percent until 2400, then 5 percent.
Transport winds.....West around 15 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......2 degrees cooler.
Min humidity........42-48 percent.
24 hr trend......6 percent wetter.
20-foot winds.......West winds around 10 mph. Gusts up to 30 mph
until 1200, then 20 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH FRIDAY...Mostly clear. Lows 40 to 45. Highs in
the mid 60s. West winds 10 to 15 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows around 40. Highs around 60. West winds around
10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 30s. Highs around 60.
.MONDAY...Partly cloudy. Slight chance of showers and snow
showers in the morning, then chance of showers, snow showers and
slight chance of thunderstorms in the afternoon. Highs in the mid
50s.
$$
WYZ140-222130-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......9 degrees warmer.
Min humidity........31-37 percent.
24 hr trend......24 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......5200-6000 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy. Patchy fog after midnight.
Chance of thunder...0 percent.
Min temperature.....33-38.
24 hr trend......3 degrees warmer.
Max humidity........79-85 percent.
24 hr trend......9 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 10
mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Patchy fog early in the morning.
Slight chance of showers and thunderstorms late
in the afternoon. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....61-66.
24 hr trend......1 degree cooler.
Min humidity........35-41 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Showers
likely after midnight. Chance of precipitation
70 percent.
Chance of thunder...20 percent.
Min temperature.....35-40.
24 hr trend......2 degrees warmer.
Max humidity........85-91 percent.
24 hr trend......7 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.12 percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......2 degrees cooler.
Min humidity........40-46 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3600-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the mid 30s. Winds generally
less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows around 40. Highs
63 to 68. Southwest winds around 10 mph.
.SATURDAY...Partly cloudy. Lows in the upper 30s. Highs in the
upper 50s. Southwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 30s. Highs in the upper 50s.
.MONDAY...Partly cloudy. Chance of showers and snow showers in
the morning, then slight chance of showers and thunderstorms in
the afternoon. Highs in the lower 50s.
$$
WYZ415-222130-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....58-63.
24 hr trend......9 degrees warmer.
Min humidity........40-46 percent.
24 hr trend......21 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......5000-5800 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy. Patchy fog early in the morning.
Chance of thunder...0 percent.
Min temperature.....34-39.
24 hr trend......4 degrees warmer.
Max humidity........76-82 percent.
24 hr trend......17 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....South around 10 mph until 2400, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy fog early in the morning. Chance of
showers and slight chance of thunderstorms in
the afternoon. Chance of precipitation 50
percent.
Chance of thunder...20 percent.
Max temperature.....56-61.
24 hr trend......2 degrees cooler.
Min humidity........48-54 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3200-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy. Showers likely and chance of
thunderstorms in the evening, then chance of
showers and slight chance of thunderstorms
after midnight. Chance of precipitation 70
percent.
Chance of thunder...30 percent.
Min temperature.....34-39.
24 hr trend......1 degree warmer.
Max humidity........86-92 percent.
24 hr trend......13 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 10
mph.
Ridge top winds.....Southwest 5 to 10 mph.
Chc of wetting rain.35 percent until 2400, then 5 percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......400-1800 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....57-62.
24 hr trend......Unchanged.
Min humidity........45-51 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3800-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 30s. Winds generally
less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows around 40. Highs in
the mid 60s. South winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs around 60. South
winds around 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
.MONDAY...Partly cloudy. Slight chance of showers and snow
showers in the morning, then slight chance of showers and
thunderstorms in the afternoon. Highs in the mid 50s.
$$
WYZ416-222130-
West Wind River Mountains/East Zone Bridger Teton NF-
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....55-60.
24 hr trend......5 degrees warmer.
Min humidity........41-47 percent.
24 hr trend......13 percent drier.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......4800-5400 ft agl.
Smoke dispersal.....Fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....34-39.
24 hr trend......6 degrees warmer.
Max humidity........74-80 percent.
24 hr trend......27 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the afternoon.
Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....53-58.
24 hr trend......Unchanged.
Min humidity........49-55 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then around 20
mph.
Mixing Height.......1200-3200 ft agl until 1200, then 3800-5800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy. Showers likely and slight chance
of thunderstorms in the evening, then chance of
showers after midnight. Chance of precipitation
70 percent.
Chance of thunder...20 percent.
Min temperature.....33-38.
24 hr trend......1 degree cooler.
Max humidity........88-94 percent.
24 hr trend......26 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.20 percent until 2400, then zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......600-2400 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....53-58.
24 hr trend......Unchanged.
Min humidity........44-50 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3800-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH FRIDAY...Mostly clear. Lows 35 to 40. Highs in
the upper 50s. Southwest winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
Southwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 30s. Highs in the mid 50s.
.MONDAY...Partly cloudy. Slight chance of showers and snow
showers in the morning, then chance of snow showers, slight
chance of showers and thunderstorms in the afternoon. Highs in
the lower 50s.
$$
WYZ288-222130-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....56-61.
24 hr trend......8 degrees warmer.
Min humidity........45-51 percent.
24 hr trend......22 percent drier.
20-foot winds.......South winds around 10 mph with higher gusts.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......3800-5400 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......4 degrees warmer.
Max humidity........70-76 percent.
24 hr trend......31 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers early
in the afternoon. Slight chance of
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....58-63.
24 hr trend......2 degrees warmer.
Min humidity........47-53 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 25 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of thunderstorms in the evening.
Chance of showers through the night. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....37-42.
24 hr trend......Unchanged.
Max humidity........77-83 percent.
24 hr trend......12 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......600-2400 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....57-62.
24 hr trend......1 degree cooler.
Min humidity........44-50 percent.
24 hr trend......1 percent wetter.
20-foot winds.......West winds around 10 mph until 1500, then
northwest. Gusts up to 25 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4000-5800 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH FRIDAY...Mostly clear. Lows 40 to 45. Highs
60 to 65. West winds 10 to 15 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the lower 60s.
West winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 40s. Highs in the lower 60s.
.MONDAY...Partly cloudy. Slight chance of showers and snow
showers in the morning, then slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 50s.
$$
WYZ414-222130-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....58-63.
24 hr trend......8 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......21 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......5400-6000 ft agl.
Smoke dispersal.....Fair to good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....35-40.
24 hr trend......6 degrees warmer.
Max humidity........74-80 percent.
24 hr trend......28 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1800-3800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Mostly cloudy. Slight chance of thunderstorms
early in the afternoon. Chance of showers in
the afternoon. Chance of thunderstorms late in
the afternoon. Chance of precipitation 50
percent.
Chance of thunder...30 percent.
Max temperature.....56-61.
24 hr trend......3 degrees cooler.
Min humidity........53-59 percent.
24 hr trend......17 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent until 1200, then 10 percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......2000-4000 ft agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Chance of showers in the
evening. Slight chance of thunderstorms until
early morning. Slight chance of showers late in
the evening. Chance of precipitation 50
percent.
Chance of thunder...20 percent.
Min temperature.....32-37.
24 hr trend......2 degrees cooler.
Max humidity........87-93 percent.
24 hr trend......28 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.10 percent until 2400, then zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......400-2400 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....58-63.
24 hr trend......2 degrees warmer.
Min humidity........42-48 percent.
24 hr trend......11 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4400-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH FRIDAY...Mostly clear. Lows 38 to 43. Highs in
the mid 60s. Southwest winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the lower 60s.
Southwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Highs in the mid 50s.
$$
WYZ278-222130-
Upper Green River Basin/Rock Springs BLM-
Including the cities of Big Piney, Farson, and Pinedale
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....58-63.
24 hr trend......5 degrees warmer.
Min humidity........32-38 percent.
24 hr trend......11 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......5600-6000 ft agl.
Smoke dispersal.....Fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....36-41.
24 hr trend......Unchanged.
Max humidity........74-80 percent.
24 hr trend......15 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....South around 10 mph until 2400, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 2400, then east.
Mixing Height.......2000-4000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....57-62.
24 hr trend......1 degree cooler.
Min humidity........46-52 percent.
24 hr trend......16 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph with higher gusts.
Ridge top winds.....East around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then
southwest.
Mixing Height.......600-2600 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Slight
chance of showers after midnight. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....34-39.
24 hr trend......2 degrees cooler.
Max humidity........88-94 percent.
24 hr trend......18 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......600-2600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....57-62.
24 hr trend......Unchanged.
Min humidity........37-43 percent.
24 hr trend......7 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Northwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH FRIDAY...Mostly clear. Lows 35 to 40. Highs
65 to 70. Winds generally less than 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the upper 60s.
Winds generally less than 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the mid 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Highs in the lower 60s.
$$
WYZ277-222130-
Lincoln and Uinta Counties/Lower Elevations-
Including the cities of Evanston, Fort Bridger, and Kemmerer
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....60-65.
24 hr trend......5 degrees warmer.
Min humidity........29-35 percent.
24 hr trend......12 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......5400-5800 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....38-43.
24 hr trend......2 degrees warmer.
Max humidity........70-76 percent.
24 hr trend......14 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northeast 5 to 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 5 mph until 2400, then east.
Mixing Height.......1800-3800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Mostly cloudy. Slight chance of thunderstorms
early in the afternoon. Chance of showers in
the afternoon. Chance of thunderstorms late in
the afternoon. Chance of precipitation 50
percent.
Chance of thunder...30 percent.
Max temperature.....58-63.
24 hr trend......3 degrees cooler.
Min humidity........50-56 percent.
24 hr trend......21 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph with higher gusts.
Ridge top winds.....East around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent until 1200, then 10 percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......400-2400 ft agl until 1200, then 3400-4800 ft
agl.
Smoke dispersal.....Poor to fair.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....34-39.
24 hr trend......4 degrees cooler.
Max humidity........88-94 percent.
24 hr trend......25 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......600-2600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......2 degrees warmer.
Min humidity........37-43 percent.
24 hr trend......12 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH SATURDAY...Mostly clear. Lows 38 to 43. Highs
in the upper 60s. Southwest winds around 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows around 40. Highs in the mid 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Highs in the lower 60s.
$$
WYZ279-222130-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Green River, Rock Springs, and Wamsutter
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......6 degrees warmer.
Min humidity........28-34 percent.
24 hr trend......11 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......6000-6600 ft agl.
Smoke dispersal.....Fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......2 degrees warmer.
Max humidity........68-74 percent.
24 hr trend......19 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southeast around 5 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers early
in the afternoon. Slight chance of
thunderstorms in the afternoon. Chance of
showers late in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...10 percent.
Max temperature.....63-68.
24 hr trend......2 degrees warmer.
Min humidity........43-49 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 15 mph with gusts to around 30
mph.
Ridge top winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......800-2800 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers early
in the evening. Slight chance of thunderstorms
in the evening. Chance of showers late in the
evening. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....40-45.
24 hr trend......1 degree cooler.
Max humidity........78-84 percent.
24 hr trend......21 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph with gusts to
around 25 mph until 2100, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....60-65.
24 hr trend......4 degrees cooler.
Min humidity........43-49 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
around 10 mph. Gusts up to 25 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4600-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH SATURDAY...Partly cloudy. Lows 42 to 47. Highs
67 to 72. Southwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 40s. Highs in the lower 70s.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Highs in the mid 60s.
$$
WYZ289-222130-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......9 degrees warmer.
Min humidity........35-41 percent.
24 hr trend......24 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......6000-6400 ft agl.
Smoke dispersal.....Fair to good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....40-45.
24 hr trend......Unchanged.
Max humidity........68-74 percent.
24 hr trend......17 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......4 degrees warmer.
Min humidity........32-38 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......600-2600 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....42-47.
24 hr trend......2 degrees warmer.
Max humidity........80-86 percent.
24 hr trend......10 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds 10 to 15 mph with gusts to
around 30 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......2000-4000 ft agl until 2400, then 600-800 ft
agl.
Smoke dispersal.....Poor to fair.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......4 degrees cooler.
Min humidity........36-42 percent.
24 hr trend......4 percent wetter.
20-foot winds.......West winds 10 to 15 mph until 1500, then around
10 mph. Gusts up to 30 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 4400-5800 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 40s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy. Slight chance of showers. Lows in the
mid 40s. Highs in the upper 60s. Winds generally less than
10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear. Lows in the upper 40s.
Highs in the lower 70s. Southwest winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs 67 to 72.
$$
WYZ300-222130-
Casper Mountain-
129 PM MDT Mon Sep 21 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......15 degrees warmer.
Min humidity........38-44 percent.
24 hr trend......45 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Northwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......5200-5800 ft agl.
Smoke dispersal.....Fair.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....41-46.
24 hr trend......3 degrees warmer.
Max humidity........74-80 percent.
24 hr trend......19 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast around 10 mph. Gusts up to 25 mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......6 degrees warmer.
Min humidity........32-38 percent.
24 hr trend......8 percent drier.
20-foot winds.......South winds around 10 mph until 1200, then
southwest. Gusts up to 20 mph.
Ridge top winds.....South around 15 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph until 1200, then west.
Mixing Height.......1000-3000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TUESDAY NIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Chance
of precipitation 40 percent.
Chance of thunder...20 percent.
Min temperature.....46-51.
24 hr trend......5 degrees warmer.
Max humidity........66-72 percent.
24 hr trend......8 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
south 10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....South 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 600-1000 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....64-69.
24 hr trend......5 degrees cooler.
Min humidity........42-48 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Southwest winds around 15 mph until 1500, then
west. Gusts up to 30 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 4800-6200 ft
agl.
Smoke dispersal.....Good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 40s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
Southeast winds around 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear. Lows in the upper 40s.
Highs in the lower 70s. Southwest winds around 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs around 70.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Highs in the mid 60s.
$$