Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
831
FNUS55 KRIW 290921
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
321 AM MDT Fri Aug 29 2025
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Much lower relative humidity compared to yesterday with values
ranging from 30 to 40 percent. West to northwest winds increase to
around 10 to 15 mph around 1100L with gusts up to 20 mph possible,
especially across higher terrain. Isolated shower and thunderstorm
chances exist across Zones 140, northern portions of 415, and 416
starting around 1500L. Chances generally diminish by 2300L with
lingering chances past Midnight for Zone 140. Good to excellent
overnight relative humidity recovery. Slightly lower relative
humidity Saturday with scattered shower and thunderstorm chances.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Lower relative humidity across the dispatch area today with values
ranging from around 25 to 40 percent for low elevations and up to 50
percent for high elevations. Winds remain relatively light today
with occasional 15 mph gusts for lower elevations. Higher elevations
could see gusts around 25 mph between 1100L and 2100L. Shower and
thunderstorm chances increase across Zones 275, 282, and 285 around
1000L and spread across the entire dispatch area by 1500L. Rainfall
amounts generally remain less than 0.10" today. Shower potential
lingers past midnight tonight for all zones. Good to excellent
overnight relative humidity recovery. Comparable relative humidity
on Saturday with scattered shower and thunderstorm chances.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Lower relative humidity across the dispatch area today with values
ranging from around 20 to 30 percent. For Zones 277 and 279,
isolated shower/thunderstorm chances exist after 1000L and continue
through 2000L, with a low wetting rain chance. A stronger
shower/thunderstorm could be capable of 40mph gusty outflows.
Shower/thunderstorm chances increase across the Bighorn Mountains by
1000L and spread across all northern zones by 1500L. Gusts around 25
mph are possible in a stronger shower/thunderstorm. Rain chances
exist into the overnight hours. Zone 281 has the greatest potential
of rain amounts above 0.25". Drier across southern zones with
similar precipitation chances for Zone 289 and north on Saturday.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-301130-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming 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...20 percent.
Max temperature.....71-76.
24 hr trend......2 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
around 10 mph with gusts to around 25 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then
slight chance of showers after midnight. Chance
of precipitation 40 percent.
Chance of thunder...20 percent.
Min temperature.....50-55.
24 hr trend......1 degree cooler.
Max humidity........88-94 percent.
24 hr trend......4 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northeast winds 10 to 15 mph with gusts to
around 25 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northeast around 15 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Chance of showers in the
morning, then showers likely and chance of
thunderstorms in the afternoon. Chance of
precipitation 60 percent.
Chance of thunder...40 percent.
Max temperature.....69-74.
24 hr trend......1 degree cooler.
Min humidity........45-51 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent until 1200, then 30 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the upper 40s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows around 50. Highs in the upper 70s. Winds
generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the lower 50s. Highs around
80. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs around 80. North
winds around 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s.
.THURSDAY...Mostly sunny. Highs in the mid 70s.
$$
WYZ283-301130-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....72-77.
24 hr trend......1 degree warmer.
Min humidity........31-37 percent.
24 hr trend......9 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest around 10 mph until 1500, then north.
Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms through the night.
Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....47-52.
24 hr trend......1 degree cooler.
Max humidity........77-83 percent.
24 hr trend......5 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph until 2400, then
south until 0300, then downslope/downvalley 4-7
mph. Gusts up to 20 mph.
Ridge top winds.....North around 15 mph until 2400, then west.
Chc of wetting rain.5 percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3200-5200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Slight chance of showers in the morning, then
chance of showers and slight chance of
thunderstorms in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....71-76.
24 hr trend......1 degree cooler.
Min humidity........36-42 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the upper 40s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows around 50. Highs in the upper 70s. Winds
generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows around 50. Highs around 80. Winds generally
less than 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s.
.THURSDAY...Mostly sunny. Highs in the mid 70s.
$$
WYZ285-301130-
South Bighorn Mountains-
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the morning, then chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....65-70.
24 hr trend......2 degrees cooler.
Min humidity........48-54 percent.
24 hr trend......3 percent drier.
20-foot winds.......Northwest winds around 10 mph with higher
gusts.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Less than 5 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.
.TONIGHT...
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.....47-52.
24 hr trend......Unchanged.
Max humidity........80-86 percent.
24 hr trend......2 percent drier.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....North around 15 mph until 2400, then west.
Chc of wetting rain.5 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Chance of showers in the
morning. Slight chance of thunderstorms late in
the morning, then showers likely and chance of
thunderstorms in the afternoon. Chance of
precipitation 70 percent.
Chance of thunder...40 percent.
Max temperature.....64-69.
24 hr trend......1 degree cooler.
Min humidity........48-54 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.5 percent until 1200, then 30 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the upper 40s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows in the lower 50s. Highs in the lower 70s.
Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the lower 50s. Highs in the
mid 70s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
North winds around 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s.
.THURSDAY...Mostly sunny. Highs in the upper 60s.
$$
WYZ281-301130-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms late in the morning. Chance of
showers and thunderstorms in the afternoon.
Chance of precipitation 50 percent.
Chance of thunder...40 percent.
Max temperature.....65-70.
24 hr trend......4 degrees cooler.
Min humidity........51-57 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent until 1200, then 35 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 3400-5400 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers and
thunderstorms in the evening, then slight
chance of showers after midnight. Chance of
precipitation 50 percent.
Chance of thunder...30 percent.
Min temperature.....49-54.
24 hr trend......2 degrees cooler.
Max humidity........84-90 percent.
24 hr trend......3 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northwest around 10 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Chance of showers in the
morning. Slight chance of thunderstorms late in
the morning, then showers likely and chance of
thunderstorms in the afternoon. Chance of
precipitation 70 percent.
Chance of thunder...40 percent.
Max temperature.....67-72.
24 hr trend......Unchanged.
Min humidity........51-57 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.5 percent until 1200, then 45 percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 3800-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows around 50. Winds generally
less than 10 mph.
.SUNDAY...Clear. Lows in the lower 50s. Highs in the upper 70s.
Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 80s. North
winds around 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
.THURSDAY...Mostly sunny. Highs in the mid 70s.
$$
WYZ282-301130-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of showers early
in the morning. Slight chance of thunderstorms
in the afternoon. Chance of showers late in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....68-73.
24 hr trend......Unchanged.
Min humidity........39-45 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms through the night.
Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....47-52.
24 hr trend......1 degree cooler.
Max humidity........79-85 percent.
24 hr trend......7 percent drier.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph until 2100, then west
until 0300, then downslope/downvalley 4-7 mph.
Gusts up to 15 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.7 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......3000-5000 ft agl until 2400, then 600-1200 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Chance of showers through the
day. Slight chance of thunderstorms in the late
morning and early afternoon, then chance of
thunderstorms late in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....69-74.
24 hr trend......Unchanged.
Min humidity........38-44 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph with higher gusts.
Ridge top winds.....West around 10 mph until 1200, then north.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the lower 50s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows in the lower 50s. Highs in the lower 80s.
Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the mid 50s. Highs in the mid
80s. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
Northwest winds around 10 mph.
.WEDNESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
.THURSDAY...Mostly sunny. Highs in the upper 70s.
$$
WYZ275-301130-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
in the morning. Chance of showers through the
day. Chance of thunderstorms in the afternoon.
Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....66-71.
24 hr trend......1 degree cooler.
Min humidity........44-50 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers and
thunderstorms in the evening, then slight
chance of showers and thunderstorms after
midnight. Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Min temperature.....47-52.
24 hr trend......2 degrees cooler.
Max humidity........80-86 percent.
24 hr trend......3 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 25 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3000-5000 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the morning, then chance of
showers and thunderstorms in the afternoon.
Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....68-73.
24 hr trend......1 degree warmer.
Min humidity........37-43 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph with higher gusts.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the lower 50s. Winds
generally less than 10 mph.
.SUNDAY...Warmer, clear. Lows in the mid 50s. Highs in the lower
80s. Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the mid 50s. Highs in the mid
80s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
North winds around 10 mph.
.WEDNESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
.THURSDAY...Mostly sunny. Highs in the upper 70s.
$$
WYZ276-301130-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers late in the morning.
Slight chance of thunderstorms early in the
afternoon, then chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....69-74.
24 hr trend......1 degree warmer.
Min humidity........39-45 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West around 10 mph until 1200, then north.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers in the
evening. Slight chance of thunderstorms in the
evening. Slight chance of showers late in the
evening. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....48-53.
24 hr trend......1 degree cooler.
Max humidity........76-82 percent.
24 hr trend......5 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 25 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North around 15 mph until 2400, then west.
Chc of wetting rain.10 percent until 2400, then zero percent.
Transport winds.....North around 15 mph until 2400, then west.
Mixing Height.......2200-4200 ft agl until 2400, then 600-1000 ft
agl.
Smoke dispersal.....Poor to fair.
.SATURDAY...
Sky/weather.........Partly 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.....69-74.
24 hr trend......1 degree warmer.
Min humidity........42-48 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northeast around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then
northeast.
Chc of wetting rain.Zero percent until 1200, then 10 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 5200-6800 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the lower 50s. Winds
generally less than 10 mph.
.SUNDAY...Mostly clear. Lows in the mid 50s. Highs in the upper
70s. Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the mid 50s. Highs around 80.
Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows around 50. Highs in the upper 70s. Northwest
winds around 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 70s.
.THURSDAY...Partly cloudy. Highs in the mid 70s.
$$
WYZ287-301130-
Owl Creek Mountains-
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming 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 40 percent.
Chance of thunder...20 percent.
Max temperature.....67-72.
24 hr trend......2 degrees warmer.
Min humidity........38-44 percent.
24 hr trend......9 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northeast around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of thunderstorms in the
evening. Chance of showers through the night.
Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Min temperature.....48-53.
24 hr trend......Unchanged.
Max humidity........76-82 percent.
24 hr trend......1 percent drier.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph until 2100, then
northwest until 2400, then downslope/downvalley
4-7 mph. Gusts up to 20 mph.
Ridge top winds.....North around 15 mph until 2400, then west.
Chc of wetting rain.20 percent until 2400, then 5 percent.
Transport winds.....North around 15 mph until 2400, then west.
Mixing Height.......2200-4200 ft agl until 2400, then 200-800 ft
agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers in the morning, then
chance of showers and thunderstorms in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....64-69.
24 hr trend......1 degree cooler.
Min humidity........44-50 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northeast around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then
northeast.
Chc of wetting rain.Zero percent until 1200, then 15 percent.
Transport winds.....North around 10 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the lower 50s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows in the lower 50s. Highs in the mid 70s.
Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the mid 50s. Highs in the mid
70s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. North
winds around 10 mph.
.WEDNESDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the upper 40s. Highs in the
lower 70s.
.THURSDAY...Mostly sunny. Highs in the lower 70s.
$$
WYZ286-301130-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers 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.....61-66.
24 hr trend......5 degrees warmer.
Min humidity........43-49 percent.
24 hr trend......21 percent drier.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....Northwest 15 to 20 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers early in the
evening. Slight chance of thunderstorms in the
evening. Slight chance of showers early in the
evening. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....41-46.
24 hr trend......Unchanged.
Max humidity........76-82 percent.
24 hr trend......17 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly 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.....61-66.
24 hr trend......Unchanged.
Min humidity........39-45 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent until 1200, then 15 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the mid 40s. Winds
generally less than 10 mph.
.SUNDAY THROUGH LABOR DAY...Mostly clear. Lows in the upper 40s.
Highs 66 to 71. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. North
winds around 10 mph.
.WEDNESDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 40s. Highs in the mid
60s.
.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the mid 60s.
$$
WYZ140-301130-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers late in the morning.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....63-68.
24 hr trend......9 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......42 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, 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.......1400-3400 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
early in the evening. Slight chance of showers
until early morning. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Min temperature.....38-43.
24 hr trend......1 degree cooler.
Max humidity........80-86 percent.
24 hr trend......10 percent drier.
Humidity recovery...Excellent.
20-foot winds.......West winds around 10 mph with gusts to around
15 mph until 2100, then downslope/downvalley
4-7 mph.
Ridge top winds.....West 5 to 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 5 to 10 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....66-71.
24 hr trend......2 degrees warmer.
Min humidity........33-39 percent.
24 hr trend......8 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the upper 30s. Winds
generally less than 10 mph.
.SUNDAY THROUGH LABOR DAY...Mostly clear. Lows in the lower 40s.
Highs 69 to 74. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.WEDNESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the upper 60s.
.THURSDAY...Partly cloudy. Highs in the upper 60s.
$$
WYZ415-301130-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms late
in the afternoon. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....63-68.
24 hr trend......6 degrees warmer.
Min humidity........37-43 percent.
24 hr trend......29 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Mostly clear. Slight chance of thunderstorms
early in the evening. Slight chance of showers
in the evening. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Min temperature.....39-44.
24 hr trend......1 degree cooler.
Max humidity........75-81 percent.
24 hr trend......19 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 15 mph until 2100, then
downslope/downvalley 4-7 mph.
Ridge top winds.....West 5 to 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 5 to 10 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....65-70.
24 hr trend......2 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SUNDAY...Clear. Lows in the lower 40s. Highs around 70. Winds
generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the mid 40s. Highs in the
lower 70s. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.WEDNESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs around 70.
.THURSDAY...Partly cloudy. Highs in the upper 60s.
$$
WYZ416-301130-
West Wind River Mountains/East Zone Bridger Teton NF-
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....61-66.
24 hr trend......6 degrees warmer.
Min humidity........32-38 percent.
24 hr trend......27 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest 10 to 15 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
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.....38-43.
24 hr trend......Unchanged.
Max humidity........75-81 percent.
24 hr trend......19 percent drier.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph until 2400, then
northeast until 0300, then downslope/downvalley
4-7 mph. Gusts up to 20 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......2800-4800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly sunny. Chance of showers and slight
chance of thunderstorms in the afternoon.
Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....61-66.
24 hr trend......1 degree warmer.
Min humidity........32-38 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the upper 30s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows in the lower 40s. Highs in the mid 60s.
Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the lower 40s. Highs in the
upper 60s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the upper 60s.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows around 40. Highs in the mid 60s.
.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the mid 60s.
$$
WYZ288-301130-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming 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 40 percent.
Chance of thunder...20 percent.
Max temperature.....63-68.
24 hr trend......2 degrees warmer.
Min humidity........32-38 percent.
24 hr trend......13 percent drier.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
in the evening. Slight chance of showers in the
evening. Slight chance of showers after
midnight. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....41-46.
24 hr trend......Unchanged.
Max humidity........75-81 percent.
24 hr trend......10 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......2800-4800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly sunny. Chance of showers and slight
chance of thunderstorms in the afternoon.
Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....61-66.
24 hr trend......1 degree cooler.
Min humidity........34-40 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the mid 40s. Winds
generally less than 10 mph.
.SUNDAY THROUGH LABOR DAY...Mostly clear. Lows in the upper 40s.
Highs 66 to 71. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.WEDNESDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the mid
60s.
.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the mid 60s.
$$
WYZ414-301130-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...10 percent.
Max temperature.....63-68.
24 hr trend......6 degrees warmer.
Min humidity........34-40 percent.
24 hr trend......24 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....38-43.
24 hr trend......Unchanged.
Max humidity........75-81 percent.
24 hr trend......21 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......2800-4800 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....66-71.
24 hr trend......2 degrees warmer.
Min humidity........28-34 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SUNDAY...Clear. Lows in the mid 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows in the mid 40s. Highs in the
lower 70s. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s. Winds
generally less than 10 mph.
.WEDNESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s.
.THURSDAY...Mostly sunny. Highs around 70.
$$
WYZ277>279-301130-
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Evanston, Fort Bridger, Kemmerer,
Big Piney, Farson, Pinedale, Green River, Rock Springs,
and Wamsutter
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of showers in the
late morning and afternoon. Slight chance of
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....65-70.
24 hr trend......2 degrees warmer.
Min humidity........34-40 percent.
24 hr trend......9 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.....Northwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
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.....41-46.
24 hr trend......2 degrees cooler.
Max humidity........73-79 percent.
24 hr trend......8 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Slight chance of showers through the day.
Slight chance of thunderstorms in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....67-72.
24 hr trend......2 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 7000-9000 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the mid 40s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows in the mid 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.LABOR DAY THROUGH TUESDAY...Mostly clear. Lows in the upper 40s.
Highs in the upper 70s. Winds generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs in the mid
70s.
$$
WYZ289-301130-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers in the afternoon.
Slight chance of thunderstorms in the
afternoon. Chance of showers late in the
afternoon. Chance of precipitation 30 percent.
Chance of thunder...20 percent.
Max temperature.....68-73.
24 hr trend......Unchanged.
Min humidity........27-33 percent.
24 hr trend......9 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
10 to 15 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.......1400-3400 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms through the night.
Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Min temperature.....48-53.
24 hr trend......1 degree cooler.
Max humidity........81-87 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph until 2400, then
northeast until 0300, then downslope/downvalley
4-7 mph. Gusts up to 20 mph.
Ridge top winds.....North around 15 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3200-5200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Slight chance of showers in the morning, then
chance of showers and slight chance of
thunderstorms in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....66-71.
24 hr trend......1 degree cooler.
Min humidity........32-38 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the upper 40s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows in the upper 40s. Highs in the mid 70s.
Winds generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows around 50. Highs in the upper
70s. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s.
Northeast winds around 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s.
.THURSDAY...Mostly sunny. Highs in the lower 70s.
$$
WYZ300-301130-
Casper Mountain-
321 AM MDT Fri Aug 29 2025
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the afternoon. Chance of
showers and thunderstorms late in the
afternoon. Chance of precipitation 40 percent.
Chance of thunder...30 percent.
Max temperature.....66-71.
24 hr trend......Unchanged.
Min humidity........39-45 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of thunderstorms in the
evening. Chance of showers through the night.
Slight chance of thunderstorms after midnight.
Chance of precipitation 40 percent.
Chance of thunder...30 percent.
Min temperature.....48-53.
24 hr trend......1 degree cooler.
Max humidity........86-92 percent.
24 hr trend......3 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Northeast winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Northeast around 15 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Chance of showers in the
morning, then showers likely and chance of
thunderstorms in the afternoon. Chance of
precipitation 70 percent.
Chance of thunder...40 percent.
Max temperature.....64-69.
24 hr trend......2 degrees cooler.
Min humidity........54-60 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent until 1200, then 40 percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly clear. Lows in the upper 40s. Winds
generally less than 10 mph.
.SUNDAY...Clear. Lows in the upper 40s. Highs around 70. Winds
generally less than 10 mph.
.LABOR DAY...Mostly clear. Lows around 50. Highs in the lower
70s. Winds generally less than 10 mph.
.TUESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 60s.
.THURSDAY...Mostly sunny. Highs in the upper 60s.
$$