Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
416
FNUS55 KRIW 200745
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
145 AM MDT Wed Aug 20 2025
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Very isolated rain showers and thunderstorms this afternoon
between 1-5PM across Yellowstone and northern Absarokas.
Lightning the main hazard to be had as gusty outflow winds should
stay at bay not more than 20-25 mph. Otherwise, winds outside of
this activity will remain 10 to 15 mph and minimum relative
humidity values around the 20 percent mark. More seasonable
temperatures and increasing storm activity Thursday and through
the weekend.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Dry conditions and hot temperatures continue Wednesday afternoon
and evening. Relatively weak southwesterly to westerly winds 10 to
20 mph with minimum relative humidity values as low as 10 to 15
percent. More seasonable temperatures and increasing storm
activity for Thursday and through the weekend.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Dry conditions and hot temperatures continue Wednesday afternoon
and evening. Relatively weak southwesterly to westerly winds 10 to
20 mph with minimum relative humidity values as low as 10 to 15
percent. More seasonable temperatures and increasing storm
activity for Thursday and through the weekend.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-210945-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....91-96.
24 hr trend......2 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......1 percent drier.
20-foot winds.......Southwest winds around 10 mph. Gusts up to 15
mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 1200, then west.
Mixing Height.......2000-4000 ft agl until 1200, then 12200-14200
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Mostly clear. Areas of smoke early in the
evening.
Chance of thunder...0 percent.
Min temperature.....61-66.
24 hr trend......1 degree warmer.
Max humidity........47-53 percent.
24 hr trend......9 percent drier.
Humidity recovery...Moderate.
20-foot winds.......South winds around 10 mph until 2100, then east
until 2400, then west until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 15 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......6800-8800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.THURSDAY...
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.....82-87.
24 hr trend......9 degrees cooler.
Min humidity........29-35 percent.
24 hr trend......19 percent wetter.
20-foot winds.......Northwest winds around 10 mph until 0900, then
northeast. Gusts up to 25 mph.
Ridge top winds.....Northeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3600-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 50s. Northeast winds
around 10 mph.
.FRIDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the upper 70s. Northeast winds
around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. East
winds around 10 mph.
.MONDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the mid 70s.
.TUESDAY...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.
$$
WYZ283-210945-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....89-94.
24 hr trend......1 degree warmer.
Min humidity........9-15 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Southwest winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 9200-11200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Areas of smoke early in the
evening.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......5 degrees warmer.
Max humidity........45-51 percent.
24 hr trend......7 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 15 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......5000-7000 ft agl until 2400, then 600-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.THURSDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....83-88.
24 hr trend......7 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......14 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then east
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 1200, then south.
Mixing Height.......1000-3000 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the mid 50s. Northeast
winds around 10 mph.
.FRIDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
Northeast winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
East winds around 10 mph.
.SUNDAY...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.
.MONDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the mid 70s.
.TUESDAY...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.
$$
WYZ285-210945-
South Bighorn Mountains-
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke in the late
morning and afternoon.
Chance of thunder...0 percent.
Max temperature.....86-91.
24 hr trend......1 degree warmer.
Min humidity........9-15 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Southwest winds around 10 mph until 1500, then
west. Gusts up to 20 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 10600-12600
ft agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Areas of smoke early in the
evening.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......1 degree cooler.
Max humidity........45-51 percent.
24 hr trend......1 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph with gusts to around
15 mph.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......3200-5200 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
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.....77-82.
24 hr trend......9 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......21 percent wetter.
20-foot winds.......Northwest winds around 10 mph until 0900. East
after 1500. Gusts up to 20 mph.
Ridge top winds.....North around 15 mph until 1200, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1200, then south.
Mixing Height.......600-2600 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 50s. Northeast winds
around 10 mph.
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
Northeast winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 70s. Northeast
winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs around 70. East winds
around 10 mph.
.MONDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the upper 60s.
.TUESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs around 70.
$$
WYZ281-210945-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke late in the
afternoon.
Chance of thunder...0 percent.
Max temperature.....91-96.
24 hr trend......Unchanged.
Min humidity........11-17 percent.
24 hr trend......1 percent wetter.
20-foot winds.......South winds 10 to 15 mph with higher gusts.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 12800-14800
ft agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Areas of smoke early in the
evening.
Chance of thunder...0 percent.
Min temperature.....61-66.
24 hr trend......1 degree warmer.
Max humidity........52-58 percent.
24 hr trend......2 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph and gusty.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......4800-6800 ft agl until 2400, then 600-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
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.....78-83.
24 hr trend......12 degrees cooler.
Min humidity........36-42 percent.
24 hr trend......23 percent wetter.
20-foot winds.......North winds 10 to 15 mph with gusts to around
25 mph.
Ridge top winds.....North 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 15 to 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4200-6000 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Chance of showers and
thunderstorms in the evening, then chance of showers and slight
chance of thunderstorms after midnight. Lows in the upper 50s.
North winds around 10 mph.
.FRIDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the mid 70s. Northeast winds
around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.SUNDAY...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.
.MONDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the mid 70s.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 70s.
$$
WYZ282-210945-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke in the morning. Isolated showers late
in the afternoon. Chance of showers 20 percent.
Chance of thunder...0 percent.
Max temperature.....88-93.
24 hr trend......Unchanged.
Min humidity........10-16 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph. Gusts up to 15 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.
Mixing Height.......1400-3400 ft agl until 1200, then 9200-11200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....57-62.
24 hr trend......1 degree warmer.
Max humidity........48-54 percent.
24 hr trend......12 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph until 0300, then
west around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor to fair.
.THURSDAY...
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.....79-84.
24 hr trend......9 degrees cooler.
Min humidity........26-32 percent.
24 hr trend......14 percent wetter.
20-foot winds.......Northwest winds around 10 mph until 1200, then
upslope/upvalley 5-9 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.......1200-3200 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. North winds around 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs in the
lower 80s. North winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs around 80. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
.TUESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs around 80.
$$
WYZ275-210945-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke in the morning. Isolated showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....85-90.
24 hr trend......1 degree cooler.
Min humidity........11-17 percent.
24 hr trend......4 percent wetter.
20-foot winds.......South winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then south
around 10 mph until 1500, then west. Gusts up
to 15 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west.
Mixing Height.......800-2800 ft agl until 1200, then 7400-9400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated thunderstorms early in
the evening. Isolated showers early in the
evening. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....56-61.
24 hr trend......1 degree warmer.
Max humidity........50-56 percent.
24 hr trend......18 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph and gusty.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor to fair.
.THURSDAY...
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.....77-82.
24 hr trend......9 degrees cooler.
Min humidity........26-32 percent.
24 hr trend......13 percent wetter.
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.......1200-3200 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Mostly clear. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the upper 50s. North winds around 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s.
Northwest winds around 10 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s. North winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.MONDAY THROUGH TUESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs 78 to 83.
$$
WYZ276-210945-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....86-91.
24 hr trend......3 degrees cooler.
Min humidity........15-21 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......4000-6000 ft agl until 1200, then 9200-11200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated thunderstorms early in
the evening. Isolated showers early in the
evening. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....57-62.
24 hr trend......3 degrees cooler.
Max humidity........53-59 percent.
24 hr trend......26 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph with gusts to around
15 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......2400-4400 ft agl until 2400, then 600-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny. 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......10 degrees cooler.
Min humidity........34-40 percent.
24 hr trend......16 percent wetter.
20-foot winds.......North winds 10 to 15 mph until 1200, then
northeast. Gusts up to 25 mph.
Ridge top winds.....North 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 3600-5400 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Mostly clear. Lows in the mid 50s. Northwest
winds around 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
mid 70s. North winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the mid 70s.
.TUESDAY...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.
$$
WYZ287-210945-
Owl Creek Mountains-
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Isolated showers and thunderstorms in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....84-89.
24 hr trend......Unchanged.
Min humidity........10-16 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......3600-5600 ft agl until 1200, then 9600-11600 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...10 percent.
Min temperature.....57-62.
24 hr trend......2 degrees cooler.
Max humidity........46-52 percent.
24 hr trend......23 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph and gusty.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......2000-4000 ft agl until 2400, then 200-800 ft
agl.
Smoke dispersal.....Poor.
.THURSDAY...
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 30
percent.
Chance of thunder...20 percent.
Max temperature.....76-81.
24 hr trend......9 degrees cooler.
Min humidity........25-31 percent.
24 hr trend......15 percent wetter.
20-foot winds.......North winds around 10 mph until 1200, then
northeast. Gusts up to 20 mph.
Ridge top winds.....North around 15 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....North around 20 mph until 1200, then south.
Mixing Height.......800-2800 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 50s. North winds
around 10 mph.
.FRIDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. North
winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s.
Northeast winds around 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the lower 70s. Winds generally less
than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the lower 50s. Highs around 70.
.TUESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the lower 70s.
$$
WYZ286-210945-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Isolated showers late in the morning. Isolated
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....78-83.
24 hr trend......4 degrees cooler.
Min humidity........17-23 percent.
24 hr trend......8 percent wetter.
20-foot winds.......West winds 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then around 25
mph.
Mixing Height.......4000-6000 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Good to very good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....49-54.
24 hr trend......2 degrees cooler.
Max humidity........58-64 percent.
24 hr trend......18 percent wetter.
Humidity recovery...Good.
20-foot winds.......West winds 10 to 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2400-4400 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.THURSDAY...
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......5 degrees cooler.
Min humidity........32-38 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southeast around 10 mph until 1200, then west.
Gusts up to 25 mph.
Ridge top winds.....East around 10 mph until 1200, then southwest
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then around
20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s. Winds
generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs around 70.
East winds around 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the upper 60s. Winds generally
less than 10 mph.
.MONDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the mid 40s. Highs in the mid 60s.
.TUESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and thunderstorms in the
afternoon. Highs in the mid 60s.
$$
WYZ140-210945-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....78-83.
24 hr trend......4 degrees cooler.
Min humidity........23-29 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph until 1200, then southwest
around 25 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 7400-9400 ft
agl.
Smoke dispersal.....Good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....45-50.
24 hr trend......1 degree cooler.
Max humidity........70-76 percent.
24 hr trend......16 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph and gusty until
2100, then downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 2400, then
northwest.
Mixing Height.......2800-4800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.THURSDAY...
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.....75-80.
24 hr trend......2 degrees cooler.
Min humidity........20-26 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.....Northeast around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 1200, then west
around 25 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Mostly clear. Lows in the lower 40s. Winds
generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear. Lows in the lower 40s.
Highs in the mid 70s. Winds generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 40s. Highs around 70.
.TUESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the upper 60s.
$$
WYZ415-210945-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Partly cloudy. Isolated showers late in the
morning. Isolated thunderstorms in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....79-84.
24 hr trend......3 degrees cooler.
Min humidity........23-29 percent.
24 hr trend......10 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 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.......2800-4800 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....49-54.
24 hr trend......Unchanged.
Max humidity........60-66 percent.
24 hr trend......13 percent wetter.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 2400, then south.
Mixing Height.......2600-4600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
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.....76-81.
24 hr trend......1 degree cooler.
Min humidity........19-25 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 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 around 10 mph until 1200, then west
around 25 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8800-10800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s. Winds
generally less than 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 70s. Winds
generally less than 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 70s. Winds
generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the mid 70s. Winds generally less
than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s.
.TUESDAY...Partly cloudy. Chance of showers in the morning, then
showers likely and chance of thunderstorms in the afternoon.
Highs in the upper 60s.
$$
WYZ416-210945-
West Wind River Mountains/East Zone Bridger Teton NF-
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Isolated showers and thunderstorms in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....76-81.
24 hr trend......1 degree cooler.
Min humidity........15-21 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 15 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......3800-5800 ft agl until 1200, then 10000-12000
ft agl.
Smoke dispersal.....Good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......2 degrees warmer.
Max humidity........53-59 percent.
24 hr trend......17 percent wetter.
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 15 mph until 2400, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....71-76.
24 hr trend......4 degrees cooler.
Min humidity........27-33 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 25 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 20
mph.
Mixing Height.......2800-4800 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s. Winds
generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs in the
lower 70s. North winds around 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the mid 40s. Highs in the upper 60s. Winds generally less
than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the lower 40s. Highs in the lower 60s.
.TUESDAY...Mostly cloudy. Chance of showers in the morning, then
showers likely and chance of thunderstorms in the afternoon.
Highs in the lower 60s.
$$
WYZ288-210945-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Isolated showers and thunderstorms in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......1 degree cooler.
Min humidity........14-20 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Southwest winds 10 to 15 mph with higher gusts.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......4000-6000 ft agl until 1200, then 11000-13000
ft agl.
Smoke dispersal.....Good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....55-60.
24 hr trend......2 degrees warmer.
Max humidity........47-53 percent.
24 hr trend......16 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph and gusty.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......4800-6800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.THURSDAY...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the afternoon.
Chance of precipitation 30 percent.
Chance of thunder...20 percent.
Max temperature.....73-78.
24 hr trend......5 degrees cooler.
Min humidity........25-31 percent.
24 hr trend......12 percent wetter.
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 around 10 mph until 1200, then around 20
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......
.THURSDAY NIGHT...Partly cloudy. Lows around 50. Northwest winds
around 10 mph.
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Northeast winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Northeast winds around 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the upper 60s. Winds generally
less than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the lower 60s.
.TUESDAY...Mostly cloudy. Chance of showers in the morning, then
showers likely and chance of thunderstorms in the afternoon.
Highs in the lower 60s.
$$
WYZ414-210945-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...10 percent.
Max temperature.....80-85.
24 hr trend......1 degree cooler.
Min humidity........14-20 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph. Gusts up to 20 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 southwest
around 20 mph.
Mixing Height.......3800-5800 ft agl until 1200, then 10800-12800
ft agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...10 percent.
Min temperature.....50-55.
24 hr trend......1 degree warmer.
Max humidity........61-67 percent.
24 hr trend......12 percent wetter.
Humidity recovery...Good.
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 until 2400, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....78-83.
24 hr trend......3 degrees cooler.
Min humidity........18-24 percent.
24 hr trend......3 percent wetter.
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 around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Lows in the lower 50s. Winds
generally less than 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Winds generally less than 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
West winds around 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the mid 70s. Winds generally less
than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s.
.TUESDAY...Partly cloudy. Chance of showers in the morning, then
showers likely and chance of thunderstorms in the afternoon.
Highs in the mid 60s.
$$
WYZ277>279-210945-
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
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....81-86.
24 hr trend......1 degree warmer.
Min humidity........11-17 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest.
Mixing Height.......1600-3600 ft agl until 1200, then 10400-12400
ft agl.
Smoke dispersal.....Poor until 1200, then very good to excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Areas of smoke after midnight.
Chance of thunder...0 percent.
Min temperature.....53-58.
24 hr trend......4 degrees warmer.
Max humidity........51-57 percent.
24 hr trend......11 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph and gusty until 2100,
then downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then north.
Mixing Height.......6000-8000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.THURSDAY...
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.....79-84.
24 hr trend......3 degrees cooler.
Min humidity........23-29 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northeast around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 1200, then west.
Mixing Height.......1600-3600 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Lows in the lower 50s. Winds
generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
lower 80s. Northeast winds around 10 mph.
.SUNDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the upper 70s. Winds generally
less than 10 mph.
.MONDAY THROUGH TUESDAY...Mostly cloudy with showers likely and
chance of thunderstorms. Lows in the upper 40s. Highs 69 to 74.
$$
WYZ289-210945-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....85-90.
24 hr trend......Unchanged.
Min humidity........7-13 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 11200-13200
ft agl.
Smoke dispersal.....Poor until 1200, then excellent.
.TONIGHT...
Sky/weather.........Mostly clear. Areas of smoke in the late
evening and overnight.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......4 degrees warmer.
Max humidity........39-45 percent.
24 hr trend......Unchanged.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......6600-8600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.THURSDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....79-84.
24 hr trend......6 degrees cooler.
Min humidity........23-29 percent.
24 hr trend......13 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 25 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 15 mph until 1200, then
northwest.
Mixing Height.......1400-3400 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the mid 50s. Northeast winds around 10 mph.
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the mid 70s.
Northeast winds around 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows around 50. Highs in the lower 70s.
.TUESDAY...Partly cloudy. Chance of showers in the morning, then
chance of showers and slight chance of thunderstorms in the
afternoon. Highs in the lower 70s.
$$
WYZ300-210945-
Casper Mountain-
145 AM MDT Wed Aug 20 2025
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......2 degrees warmer.
Min humidity........9-15 percent.
24 hr trend......2 percent drier.
20-foot winds.......South winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph until 1200, then west.
Mixing Height.......3600-5600 ft agl until 1200, then 12000-14000
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......Unchanged.
Max humidity........46-52 percent.
24 hr trend......10 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......5800-7800 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...10 percent.
Max temperature.....78-83.
24 hr trend......6 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......17 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.THURSDAY NIGHT...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 50s. East winds around
10 mph.
.FRIDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the mid 70s. Northeast winds
around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 70s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the upper 60s. Winds generally
less than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
.TUESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the upper 60s.
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