Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
456
FNUS55 KRIW 160921
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
321 AM MDT Sun Aug 16 2026
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Monsoonal moisture will remain over the area today, but somewhat
less then yesterday. The result will be another day of scattered
showers and storms, but less numerous than the previous couple of
days. The highest coverage will be in the northern zones. Relative
humidity will remain above critical levels. Wind should remain
light to moderate except in and around any shower or thunderstorm.
Mixing and smoke dispersal will be generally good in the afternoon.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Monsoonal moisture will remain over the area today, but somewhat
less then yesterday. The result will be another day of isolated to
scattered showers and storms, but less numerous than the previous
couple of days. The highest coverage will be in zones 286 and 276.
Relative humidity will remain above critical levels. Wind should remain
light to moderate except in and around any shower or thunderstorm.
Mixing and smoke dispersal will be generally good in the afternoon.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
The main area of monsoonal moisture should remain to the west of
most of the dispatch area today, with chances of a shower or
storm generally 1 out of 5 or less, with the highest chance
in Zones 277 and 278. Relative humidity will remain above critical
levels. Wind should remain light to moderate except in and around
any shower or thunderstorm. Mixing and smoke dispersal will be
generally good in the afternoon.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-171130-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......5 degrees warmer.
Min humidity........24-30 percent.
24 hr trend......30 percent drier.
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.......1400-3400 ft agl until 1200, then 7000-9000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....52-57.
24 hr trend......2 degrees warmer.
Max humidity........64-70 percent.
24 hr trend......27 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest around 10 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then west.
Mixing Height.......3400-5400 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.MONDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....81-86.
24 hr trend......2 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, 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.......1800-3800 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows in the mid 50s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Lows in the mid 50s. Highs in the
lower 80s. Northwest winds around 10 mph.
.THURSDAY...Mostly clear. Lows in the upper 50s. Highs in the
upper 80s. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs around
90.
$$
WYZ283-171130-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
321 AM MDT Sun Aug 16 2026
.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.....76-81.
24 hr trend......2 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......6 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 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....49-54.
24 hr trend......2 degrees warmer.
Max humidity........63-69 percent.
24 hr trend......18 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northwest around 10 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......1800-3800 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......2 degrees warmer.
Min humidity........25-31 percent.
24 hr trend......5 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 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 6800-8800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows in the mid 50s. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs 78 to 83.
Winds generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows around 60. Highs in the upper
80s.
$$
WYZ285-171130-
South Bighorn Mountains-
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny. Slight chance of showers and
thunderstorms early in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....71-76.
24 hr trend......4 degrees warmer.
Min humidity........31-37 percent.
24 hr trend......24 percent drier.
20-foot winds.......West winds around 10 mph with higher gusts.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6000-8000 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 early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....52-57.
24 hr trend......3 degrees warmer.
Max humidity........55-61 percent.
24 hr trend......35 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph and gusty until
2100, then downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......2000-4000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......2 degrees warmer.
Min humidity........26-32 percent.
24 hr trend......4 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.......2400-4400 ft agl until 1200, then 7400-9400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the mid 50s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Lows in the mid 50s. Highs in the mid
70s. Northwest winds around 10 mph.
.THURSDAY...Mostly clear. Lows in the upper 50s. Highs in the
upper 70s. Northwest winds around 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows around 60. Highs in the lower
80s.
$$
WYZ281-171130-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny. Slight chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....74-79.
24 hr trend......7 degrees warmer.
Min humidity........34-40 percent.
24 hr trend......33 percent drier.
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.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......1200-3200 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....53-58.
24 hr trend......2 degrees warmer.
Max humidity........67-73 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.....Northwest around 10 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......2 degrees warmer.
Min humidity........31-37 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph with higher gusts.
Ridge top winds.....Northwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the upper 50s. Winds generally less than
10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs 78 to 83.
Winds generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the lower 60s. Highs 87 to 92.
$$
WYZ282-171130-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
321 AM MDT Sun Aug 16 2026
.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 50 percent.
Chance of thunder...20 percent.
Max temperature.....74-79.
24 hr trend......4 degrees warmer.
Min humidity........29-35 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 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.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......1000-3000 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then fair to good.
.TONIGHT...
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.....51-56.
24 hr trend......2 degrees warmer.
Max humidity........62-68 percent.
24 hr trend......15 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....East around 10 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then west.
Mixing Height.......1800-3800 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......2 degrees warmer.
Min humidity........25-31 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph with higher gusts.
Ridge top winds.....Southwest around 5 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....South around 5 mph until 1200, then west.
Mixing Height.......800-2800 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then fair to good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers after
midnight. Lows in the upper 50s. Winds generally less than
10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs around 80. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Mostly clear. Lows 56 to 61. Highs
82 to 87. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the lower 60s. Highs around
90.
$$
WYZ275-171130-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
321 AM MDT Sun Aug 16 2026
.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 50 percent.
Chance of thunder...20 percent.
Max temperature.....72-77.
24 hr trend......4 degrees warmer.
Min humidity........31-37 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then northwest.
Mixing Height.......1000-3000 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Slight
chance of showers late in the evening. Chance
of precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....51-56.
24 hr trend......1 degree warmer.
Max humidity........66-72 percent.
24 hr trend......11 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......1800-3800 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....72-77.
24 hr trend......1 degree warmer.
Min humidity........29-35 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South 5 to 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest.
Mixing Height.......800-2800 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then chance of showers after
midnight. Lows in the upper 50s. Winds generally less than
10 mph.
.TUESDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Winds
generally less than 10 mph.
.WEDNESDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the upper 50s. Highs in the mid
80s. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 60s. Highs in the
upper 80s.
$$
WYZ276-171130-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
321 AM MDT Sun Aug 16 2026
.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 in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....74-79.
24 hr trend......5 degrees warmer.
Min humidity........40-46 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 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.....West 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Fair to good.
.TONIGHT...
Sky/weather.........Partly cloudy. Chance of showers early in the
evening. Slight chance of thunderstorms early
in the evening. Slight chance of showers early
in the evening. Chance of precipitation 40
percent.
Chance of thunder...20 percent.
Min temperature.....52-57.
24 hr trend......2 degrees warmer.
Max humidity........60-66 percent.
24 hr trend......14 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......1200-3200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy. Slight chance of showers late in
the morning. Slight chance of thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....74-79.
24 hr trend......2 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......5 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.....Southwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the mid 50s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Winds
generally less than 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
Winds generally less than 10 mph.
.FRIDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows around 60. Highs in the lower 80s.
.SATURDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the mid 80s.
$$
WYZ287-171130-
Owl Creek Mountains-
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of showers and slight chance of
thunderstorms in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....70-75.
24 hr trend......4 degrees warmer.
Min humidity........37-43 percent.
24 hr trend......11 percent drier.
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.....West 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. Slight chance of showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....52-57.
24 hr trend......3 degrees warmer.
Max humidity........55-61 percent.
24 hr trend......20 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 10
mph.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......1200-3200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......2 degrees warmer.
Min humidity........31-37 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers after
midnight. Lows in the upper 50s. Winds generally less than
10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the mid 50s. 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 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 70s.
Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the lower 60s. Highs in the
lower 80s.
$$
WYZ286-171130-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
321 AM MDT Sun Aug 16 2026
.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 in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....67-72.
24 hr trend......3 degrees warmer.
Min humidity........38-44 percent.
24 hr trend......11 percent drier.
20-foot winds.......West winds 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Fair to good until 1200, then good to very
good.
.TONIGHT...
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.....45-50.
24 hr trend......2 degrees warmer.
Max humidity........71-77 percent.
24 hr trend......25 percent drier.
Humidity recovery...Excellent.
20-foot winds.......West winds around 10 mph with gusts to around
25 mph until 2100, then downslope/downvalley
4-7 mph until 2400, then west around 10 mph
with gusts to around 15 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......1800-3800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy. Slight chance of showers late in
the morning. Slight chance of thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....66-71.
24 hr trend......1 degree warmer.
Min humidity........35-41 percent.
24 hr trend......4 percent drier.
20-foot winds.......West winds 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 6800-8800 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then chance of showers after
midnight. Lows in the upper 40s. Winds generally less than
10 mph.
.TUESDAY...Partly cloudy. Showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the mid 60s. West
winds around 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
West winds around 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
West winds around 10 mph.
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the mid 70s.
.SATURDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. Highs in the lower 70s.
$$
WYZ140-171130-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
321 AM MDT Sun Aug 16 2026
.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 early in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....69-74.
24 hr trend......3 degrees warmer.
Min humidity........44-50 percent.
24 hr trend......14 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.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 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 early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....40-45.
24 hr trend......2 degrees warmer.
Max humidity........77-83 percent.
24 hr trend......11 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then southeast.
Mixing Height.......2000-4000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of showers late in the morning.
Slight chance of thunderstorms in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....69-74.
24 hr trend......1 degree warmer.
Min humidity........45-51 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 25 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Less than 5 percent.
Transport winds.....South around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then chance of showers after
midnight. Lows in the mid 40s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. 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 slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 40s. Highs in the lower
70s. Winds generally less than 10 mph.
.FRIDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s.
.SATURDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. Highs in the lower 70s.
$$
WYZ415-171130-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming 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.....69-74.
24 hr trend......4 degrees warmer.
Min humidity........45-51 percent.
24 hr trend......19 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.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good.
.TONIGHT...
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.....41-46.
24 hr trend......2 degrees warmer.
Max humidity........75-81 percent.
24 hr trend......19 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 2400, then south.
Mixing Height.......2000-4000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....69-74.
24 hr trend......1 degree warmer.
Min humidity........41-47 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph with gusts to around 25 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 7000-9000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Chance of showers after midnight.
Lows in the upper 40s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. 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 slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs around 70. Winds
generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s. Winds generally less than 10 mph.
.FRIDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows around 50. Highs in the mid 70s.
.SATURDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. Highs in the lower 70s.
$$
WYZ416-171130-
West Wind River Mountains/East Zone Bridger Teton NF-
321 AM MDT Sun Aug 16 2026
.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.....65-70.
24 hr trend......3 degrees warmer.
Min humidity........38-44 percent.
24 hr trend......8 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, 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 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 to very
good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......2 degrees warmer.
Max humidity........69-75 percent.
24 hr trend......19 percent drier.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph and gusty until 2100,
then downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest around 10 mph until 2400, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then northeast.
Mixing Height.......2000-4000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....65-70.
24 hr trend......1 degree warmer.
Min humidity........34-40 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 6800-8800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Slight chance of showers after
midnight. Lows in the mid 40s. Winds generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 60s. Winds
generally less than 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. West
winds around 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.FRIDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
.SATURDAY...Partly cloudy. Chance of showers in the morning, then
chance of showers and thunderstorms in the afternoon. Highs
around 70.
$$
WYZ288-171130-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming 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.....68-73.
24 hr trend......2 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......3 percent drier.
20-foot winds.......West winds around 10 mph with gusts to around
25 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......3 degrees warmer.
Max humidity........61-67 percent.
24 hr trend......24 percent drier.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......2400-4400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......2 degrees warmer.
Min humidity........32-38 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Slight chance of showers after
midnight. Lows in the lower 50s. Winds generally less than
10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
West winds around 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs around 70. West winds
around 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. West
winds around 10 mph.
.FRIDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 50s. Highs in the mid 70s.
.SATURDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the mid 70s.
$$
WYZ414-171130-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
321 AM MDT Sun Aug 16 2026
.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.....69-74.
24 hr trend......4 degrees warmer.
Min humidity........34-40 percent.
24 hr trend......10 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.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 6800-8800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....41-46.
24 hr trend......2 degrees warmer.
Max humidity........72-78 percent.
24 hr trend......15 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....West around 10 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then south.
Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.MONDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....69-74.
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 west
around 10 mph with gusts to around 25 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 8200-10000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Mostly cloudy. Slight chance of showers after
midnight. Lows in the upper 40s. Winds generally less than
10 mph.
.TUESDAY...Partly cloudy with 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 upper 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.FRIDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
.SATURDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. Highs in the mid 70s.
$$
WYZ278-171130-
Upper Green River Basin/Rock Springs BLM-
Including the cities of Big Piney, Farson, and Pinedale
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the afternoon. Chance of precipitation
20 percent.
Chance of thunder...10 percent.
Max temperature.....71-76.
24 hr trend......4 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......9 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.....North around 5 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....43-48.
24 hr trend......3 degrees warmer.
Max humidity........73-79 percent.
24 hr trend......13 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....North around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph.
Mixing Height.......3400-5400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.MONDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......1 degree warmer.
Min humidity........28-34 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph with gusts to around 25 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows in the upper 40s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 40s. Highs in the mid 70s.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Northwest winds around 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 80s. Winds
generally less than 10 mph.
.FRIDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
.SATURDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs around 80.
$$
WYZ277-171130-
Lincoln and Uinta Counties/Lower Elevations-
Including the cities of Evanston, Fort Bridger, and Kemmerer
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......3 degrees warmer.
Min humidity........25-31 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast around 5 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 5 mph until 1200, then west.
Mixing Height.......2200-4200 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....43-48.
24 hr trend......3 degrees warmer.
Max humidity........71-77 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.....Northwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......4000-6000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.MONDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......1 degree warmer.
Min humidity........24-30 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph with higher gusts.
Ridge top winds.....South around 5 mph until 1200, then west around
15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 8800-10600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows around 50. Winds generally
less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Lows around 50. Highs around 80.
Winds generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s. Winds generally less than 10 mph.
.FRIDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 80s.
.SATURDAY...Partly cloudy. Chance of showers and thunderstorms in
the afternoon. Highs in the lower 80s.
$$
WYZ279-171130-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Green River, Rock Springs, and Wamsutter
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......3 degrees warmer.
Min humidity........31-37 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.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8800-10800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......3 degrees warmer.
Max humidity........61-67 percent.
24 hr trend......18 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 20
mph until 2400, then 10 mph.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph.
Mixing Height.......4400-6400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.MONDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......2 degrees warmer.
Min humidity........31-37 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, 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.......3000-5000 ft agl until 1200, then 9800-11800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows in the mid 50s. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
lower 80s. Winds generally less than 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 80s. Winds
generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs 83 to 88.
$$
WYZ289-171130-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
321 AM MDT Sun Aug 16 2026
.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.....76-81.
24 hr trend......2 degrees warmer.
Min humidity........21-27 percent.
24 hr trend......7 percent drier.
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 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....51-56.
24 hr trend......3 degrees warmer.
Max humidity........57-63 percent.
24 hr trend......26 percent drier.
Humidity recovery...Good.
20-foot winds.......Northwest winds around 10 mph and gusty until
2100. Downslope/downvalley 4-7 mph after 0300.
Ridge top winds.....Northwest 5 to 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then east.
Mixing Height.......4000-6000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.MONDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......2 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 20
mph.
Mixing Height.......3000-5000 ft agl until 1200, then 9600-11600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows in the mid 50s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Lows in the mid 50s. Highs around 80.
Winds generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs in the
mid 80s.
$$
WYZ300-171130-
Casper Mountain-
321 AM MDT Sun Aug 16 2026
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......4 degrees warmer.
Min humidity........26-32 percent.
24 hr trend......19 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.....Southwest around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....52-57.
24 hr trend......3 degrees warmer.
Max humidity........57-63 percent.
24 hr trend......34 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....North around 10 mph until 2400, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then southeast.
Mixing Height.......3600-5600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.MONDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....76-81.
24 hr trend......2 degrees warmer.
Min humidity........24-30 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, 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.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 9800-11800 ft
agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.Forecast days 3 through 7......
.MONDAY NIGHT...Partly cloudy. Lows in the mid 50s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Lows in the lower 50s. Highs in the
mid 70s. Winds generally less than 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs around 80.
Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs in the
lower 80s.
$$