Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
257
FNUS55 KRIW 040946
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
346 AM MDT Thu Sep 4 2025
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
A cold front will approach the area today, but the main impacts
will remain East of the Divide. An isolated shower or thunderstorm
is possible in Zone 416, but even here the chance is only about
1 out of 6. Breezy conditions will develop in the afternoon.
Relative humidity should remain above critical levels. Mixing
and smoke dispersal be very good to excellent in the afternoon.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
A cold front will move southward across the area. A stray shower
or thunderstorm is possible in and near the mountains, but the
chance is less than 1 out of 5. Windy conditions will develop behind
the front, with wind gusts past 30 mph possible in most locations
in the afternoon and gusts close to 50 mph in the northern zones.
Relative humidity should remain above critical levels though.
Elevated fire weather is likely in the afternoon though, Mixing
amd smoke dispersal will be generally good to excellent in the
afternoon.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
A cold front will move southward across the area. A stray shower
or thunderstorm is possible in and near Big Horns, but the
chance is less than 1 out of 5. Windy conditions develop behind
the front, with the strongest wind in Zone 281 where wind gusts
as high as 60 mph are possible in the afternoon. Although relative
humidity should remain above critical levels, elevated fire weather
is likely this afternoon. Mixing and smoke dispersal will be
excellent in the afternoon.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-051200-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......4 degrees cooler.
Min humidity........22-28 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Breezy. Upslope/upvalley 5-9 mph until 0900,
then northwest 10 to 15 mph with gusts to
around 40 mph until 1500, then north around 25
mph with gusts to around 40 mph.
Ridge top winds.....West around 15 mph until 1200, then north
around 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1200, then north
around 25 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....40-45.
24 hr trend......13 degrees cooler.
Max humidity........58-64 percent.
24 hr trend......4 percent wetter.
Humidity recovery...Good.
20-foot winds.......Breezy. Northeast winds around 25 mph with
gusts to around 40 mph until 2100.
Downslope/downvalley 4-7 mph after 0300.
Ridge top winds.....Northeast around 25 mph until 2400, then around
15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 25 mph until 2400, then around
15 mph.
Mixing Height.......1600-3600 ft agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......13 degrees cooler.
Min humidity........27-33 percent.
24 hr trend......8 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....Northeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 4400-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows around 40. Winds generally less than
10 mph.
.SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the lower
70s. Winds generally less than 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
Southwest winds around 10 mph.
.MONDAY...Partly cloudy. Lows in the lower 50s. Highs around 80.
West winds around 10 mph.
.TUESDAY...Partly cloudy. Lows in the lower 50s. Highs around 80.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs around 80.
$$
WYZ283-051200-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke through the day.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......4 degrees cooler.
Min humidity........22-28 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north
10 to 15 mph with gusts to around 40 mph until
1500, then around 20 mph with gusts to around
40 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then north
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 1200, then north
around 25 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......11 degrees cooler.
Max humidity........67-73 percent.
24 hr trend......17 percent wetter.
Humidity recovery...Good.
20-foot winds.......Northeast winds 15 to 20 mph with gusts to
around 40 mph until 2400, then around 10 mph
and gusty.
Ridge top winds.....Northeast around 25 mph until 2400, then around
15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 25 mph until 2400, then around
15 mph.
Mixing Height.......2400-4400 ft agl until 2400, then 1000-2400 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......12 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......12 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 10 to 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 4200-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s. Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs around
80. West winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows around 50. Highs in the upper
70s.
$$
WYZ285-051200-
South Bighorn Mountains-
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......4 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......8 percent wetter.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 25 mph until 1200, then around 20 mph
with gusts to around 40 mph.
Ridge top winds.....Northwest around 15 mph until 1200, then around
25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1200, then around
25 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....38-43.
24 hr trend......15 degrees cooler.
Max humidity........62-68 percent.
24 hr trend......16 percent wetter.
Humidity recovery...Good.
20-foot winds.......North winds 15 to 20 mph with gusts to around
40 mph until 2400. Downslope/downvalley 4-7 mph
after 0300.
Ridge top winds.....North around 25 mph until 2400, then northwest
around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 25 mph until 2400, then around
15 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 400-1400 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming sunny.
Chance of thunder...0 percent.
Max temperature.....60-65.
24 hr trend......11 degrees cooler.
Min humidity........27-33 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....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 3400-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the upper
60s. Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows in the lower 50s.
Highs in the mid 70s. West winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
lower 70s.
$$
WYZ281-051200-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
346 AM MDT Thu Sep 4 2025
...HIGH WIND WARNING IN EFFECT FROM 10 AM THIS MORNING TO 6 PM
MDT THIS EVENING...
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke through the day.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......3 degrees cooler.
Min humidity........28-34 percent.
24 hr trend......Unchanged.
20-foot winds.......Windy. Northwest winds around 10 mph with gusts
to around 45 mph until 0900. North 30 to 35 mph
with gusts to around 55 mph after 1200.
Ridge top winds.....Northwest around 20 mph until 1200, then north
around 35 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 1200, then north
around 35 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......15 degrees cooler.
Max humidity........62-68 percent.
24 hr trend......1 percent wetter.
Humidity recovery...Good.
20-foot winds.......Breezy. North winds 20 to 25 mph with gusts to
around 50 mph until 2400. Downslope/downvalley
4-7 mph after 0300.
Ridge top winds.....North around 25 mph until 2400, then around 10
mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 25 mph until 2400, then around 10
mph.
Mixing Height.......1800-3800 ft agl until 2400, then 600-1600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......11 degrees cooler.
Min humidity........28-34 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5000-6400 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows around 40. Winds generally less than
10 mph.
.SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the lower
70s. Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows in the mid 50s.
Highs in the lower 80s. Northwest winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
lower 80s.
$$
WYZ282-051200-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......5 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Breezy. Upslope/upvalley 5-9 mph until 0900,
then northwest around 10 mph with gusts to
around 25 mph until 1200, then north 20 to 25
mph with gusts to around 40 mph.
Ridge top winds.....West around 15 mph until 1200, then north
around 30 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1200, then around
30 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....38-43.
24 hr trend......12 degrees cooler.
Max humidity........65-71 percent.
24 hr trend......5 percent wetter.
Humidity recovery...Good.
20-foot winds.......Breezy. Northwest winds 20 to 25 mph with gusts
to around 45 mph until 2400, then 10 to 15 mph
with gusts to around 30 mph.
Ridge top winds.....Northwest around 25 mph until 2400, then around
15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 25 mph until 2400, then around
15 mph.
Mixing Height.......2000-4000 ft agl until 2400, then 800-1600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......11 degrees cooler.
Min humidity........22-28 percent.
24 hr trend......1 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.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 4600-5800 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SATURDAY...Warmer. Mostly clear. Lows in the upper 40s. Highs in
the upper 70s. Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs in the
lower 80s. 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.
$$
WYZ275-051200-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke through the day.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......8 degrees cooler.
Min humidity........28-34 percent.
24 hr trend......10 percent wetter.
20-foot winds.......Windy. Upslope/upvalley 5-9 mph until 0900.
Winds north 25 to 30 mph with gusts to around
45 mph after 1200.
Ridge top winds.....Northwest around 15 mph until 1200, then north
around 30 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1200, then north
around 30 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....36-41.
24 hr trend......15 degrees cooler.
Max humidity........64-70 percent.
24 hr trend......5 percent wetter.
Humidity recovery...Good.
20-foot winds.......Breezy. North winds 20 to 25 mph with gusts to
around 45 mph until 2400, then 10 to 15 mph
with gusts to around 30 mph.
Ridge top winds.....North around 25 mph until 2400, then around 15
mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 25 mph until 2400, then around 15
mph.
Mixing Height.......1600-3600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......8 degrees cooler.
Min humidity........21-27 percent.
24 hr trend......5 percent drier.
20-foot winds.......Northwest winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4200-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SATURDAY...Warmer. Mostly clear. Lows in the upper 40s. Highs in
the upper 70s. Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs in the
lower 80s. 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.
$$
WYZ276-051200-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke through the day.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......8 degrees cooler.
Min humidity........31-37 percent.
24 hr trend......12 percent wetter.
20-foot winds.......Windy. Northwest winds 10 to 15 mph with gusts
to around 30 mph until 1200, then north 25 to
30 mph with gusts to around 50 mph.
Ridge top winds.....Northwest around 15 mph until 1200, then north
around 30 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 1200, then north
around 30 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....39-44.
24 hr trend......16 degrees cooler.
Max humidity........64-70 percent.
24 hr trend......18 percent wetter.
Humidity recovery...Good.
20-foot winds.......Breezy. North winds around 25 mph with gusts to
around 45 mph until 2100, then 10 to 15 mph
with gusts to around 45 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North around 25 mph until 2400, then northwest
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 25 mph until 2400, then around 10
mph.
Mixing Height.......1600-3600 ft agl until 2400, then 600-1200 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......8 degrees cooler.
Min humidity........31-37 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast 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 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3600-5000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the
lower 70s. Winds generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Southwest winds around 10 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
West winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and slight chance of thunderstorms. Lows in the lower 50s. Highs
in the mid 70s.
$$
WYZ287-051200-
Owl Creek Mountains-
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......6 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Breezy. Northwest winds 10 to 15 mph with gusts
to around 30 mph until 1200, then north around
25 mph with gusts to around 45 mph.
Ridge top winds.....Northwest around 15 mph until 1200, then north
around 30 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1200, then north
around 30 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....39-44.
24 hr trend......15 degrees cooler.
Max humidity........58-64 percent.
24 hr trend......19 percent wetter.
Humidity recovery...Good.
20-foot winds.......Breezy. North winds around 25 mph with gusts to
around 50 mph until 2400, then 10 to 15 mph
with gusts to around 35 mph.
Ridge top winds.....North around 30 mph until 2400, then around 20
mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 30 mph until 2400, then around 20
mph.
Mixing Height.......1600-3600 ft agl until 2400, then 400-1400 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......11 degrees cooler.
Min humidity........33-39 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast 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 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3200-5000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the mid 40s. Winds generally less
than 10 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs around 70.
Winds generally less than 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. West
winds around 10 mph.
.MONDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. West
winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and slight chance of thunderstorms. Lows in the lower 50s. Highs
in the lower 70s.
$$
WYZ286-051200-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke through the day. Slight chance of
showers and thunderstorms early in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....64-69.
24 hr trend......7 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......8 percent wetter.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 35 mph until 1500, then north around 20
mph with gusts to around 35 mph.
Ridge top winds.....Northwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....34-39.
24 hr trend......13 degrees cooler.
Max humidity........75-81 percent.
24 hr trend......28 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Northeast winds 10 to 15 mph with gusts to
around 35 mph until 2400, then east with gusts
to around 15 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northeast around 20 mph until 2400, then
southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 20 mph until 2400, then east
around 10 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 400-1200 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....58-63.
24 hr trend......7 degrees cooler.
Min humidity........33-39 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....South around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3200-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the upper 30s. Winds generally
less than 10 mph.
.SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
60s. South winds around 10 mph.
.SUNDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the mid 40s. Highs in the mid 60s. West winds around
10 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 40s. Highs in the mid 60s. West
winds around 10 mph.
.TUESDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 40s. Highs in the lower 60s.
.WEDNESDAY...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 60s.
$$
WYZ140-051200-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......6 degrees cooler.
Min humidity........28-34 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 1200, then around
20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 6800-8800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....35-40.
24 hr trend......10 degrees cooler.
Max humidity........79-85 percent.
24 hr trend......26 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph with gusts to around
25 mph until 2400, then downslope/downvalley
4-7 mph.
Ridge top winds.....Northeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming sunny.
Chance of thunder...0 percent.
Max temperature.....65-70.
24 hr trend......4 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northeast around 10 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the mid 30s. Winds generally less
than 10 mph.
.SATURDAY...Mostly clear. Lows in the lower 40s. Highs in the
lower 70s. Winds generally less than 10 mph.
.SUNDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the lower 40s. Highs in the upper 60s. Winds generally
less than 10 mph.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the mid 60s. Winds
generally less than 10 mph.
.TUESDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
.WEDNESDAY...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 60s.
$$
WYZ415-051200-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke through the day.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......4 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 1200, then northwest
around 20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......9 degrees cooler.
Max humidity........76-82 percent.
24 hr trend......28 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph with gusts to around
25 mph until 2400, then east with gusts to
around 15 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North around 15 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then east.
Mixing Height.......3600-5600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......3 degrees cooler.
Min humidity........31-37 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then northwest.
Mixing Height.......1200-3200 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows around 40. Winds generally less than
10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s. Winds
generally less than 10 mph.
.SUNDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the lower 40s. Highs in the upper 60s. Winds generally
less than 10 mph.
.MONDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the lower 40s. Highs in the mid 60s. Winds generally less
than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and slight chance of thunderstorms. Lows in the lower 40s. Highs
in the lower 60s.
$$
WYZ416-051200-
West Wind River Mountains/East Zone Bridger Teton NF-
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke through the day. Slight chance of
showers and thunderstorms early in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....68-73.
24 hr trend......4 degrees cooler.
Min humidity........22-28 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest 10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then around
20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......3200-5200 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....35-40.
24 hr trend......9 degrees cooler.
Max humidity........81-87 percent.
24 hr trend......33 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Northeast winds 10 to 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 25
mph.
Ridge top winds.....Northeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3000-5000 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...10 percent.
Max temperature.....62-67.
24 hr trend......5 degrees cooler.
Min humidity........37-43 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 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Lows in the upper 30s. Winds
generally less than 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the mid 60s. Winds
generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 40s. Highs in the lower 60s. Winds generally
less than 10 mph.
.MONDAY...Partly cloudy with chance of showers and thunderstorms.
Lows around 40. Highs in the lower 60s. Southwest winds around
10 mph.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows around 40. Highs around 60.
.WEDNESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs around 60.
$$
WYZ288-051200-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke through the day. Slight chance of
showers and thunderstorms early in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....69-74.
24 hr trend......4 degrees cooler.
Min humidity........22-28 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Northwest winds 10 to 15 mph until 1500, then
north. Gusts up to 25 mph.
Ridge top winds.....Northwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......3200-5200 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....35-40.
24 hr trend......13 degrees cooler.
Max humidity........77-83 percent.
24 hr trend......33 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Northeast winds around 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 35
mph.
Ridge top winds.....East 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 15 to 20 mph.
Mixing Height.......2000-4000 ft agl until 2400, then 400-1200 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......10 degrees cooler.
Min humidity........39-45 percent.
24 hr trend......18 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3200-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Lows around 40. Winds generally
less than 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 60s. Winds
generally less than 10 mph.
.SUNDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 40s. Highs in the mid 60s. West
winds around 10 mph.
.MONDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 60s. West
winds around 10 mph.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 40s. Highs in the mid 60s.
.WEDNESDAY...Partly cloudy. Slight chance of showers in the
morning, then slight chance of showers and thunderstorms in the
afternoon. Highs in the mid 60s.
$$
WYZ414-051200-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke late in the morning.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......3 degrees cooler.
Min humidity........19-25 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then northwest
around 20 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......8 degrees cooler.
Max humidity........74-80 percent.
24 hr trend......27 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 25 mph until 2400, then
downslope/downvalley 4-7 mph until 0300, then
southeast around 10 mph with gusts to around 15
mph.
Ridge top winds.....Northwest around 15 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then southeast.
Mixing Height.......3200-5200 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...10 percent.
Max temperature.....69-74.
24 hr trend......3 degrees cooler.
Min humidity........31-37 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 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 northwest.
Mixing Height.......1400-3400 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows in the lower 40s. Winds generally
less than 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s. Winds
generally less than 10 mph.
.SUNDAY...Mostly cloudy. Showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.MONDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the lower 40s. Highs in the upper 60s. Winds generally
less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 40s. Highs in the mid 60s.
.WEDNESDAY...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 60s.
$$
WYZ277>279-051200-
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
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......2 degrees cooler.
Min humidity........18-24 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 1200, then around
20 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 10000-12000
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....40-45.
24 hr trend......8 degrees cooler.
Max humidity........76-82 percent.
24 hr trend......28 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 15 mph until 2400, then
east. Gusts up to 35 mph.
Ridge top winds.....North around 20 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 20 mph until 2400, then east.
Mixing Height.......4400-6400 ft agl until 2400, then 600-1600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
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.....68-73.
24 hr trend......6 degrees cooler.
Min humidity........32-38 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Northeast winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....East around 15 mph until 1200, then northwest.
Chc of wetting rain.Zero percent.
Transport winds.....East around 15 mph until 1200, then northwest.
Mixing Height.......800-2800 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Lows in the mid 40s. Winds
generally less than 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 40s. Highs in the mid 70s. Winds generally less
than 10 mph.
.MONDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 70s.
Southwest winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs in the
lower 70s.
$$
WYZ289-051200-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke through the day. 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......3 degrees cooler.
Min humidity........16-22 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....Northwest around 10 mph until 1200, then around
20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 1200, then around
20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....38-43.
24 hr trend......13 degrees cooler.
Max humidity........64-70 percent.
24 hr trend......24 percent wetter.
Humidity recovery...Good.
20-foot winds.......Northeast winds 15 to 20 mph until 0300, then
around 10 mph. Gusts up to 35 mph.
Ridge top winds.....Northeast 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 20 to 25 mph.
Mixing Height.......3000-5000 ft agl until 2400, then 800-2000 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......11 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 1200, then
northwest.
Mixing Height.......1000-3000 ft agl until 1200, then 3400-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Lows in the lower 40s. Northeast
winds around 10 mph.
.SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the
lower 70s. Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows around 50. Highs in the mid 70s.
Southwest winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows around 50. Highs in the mid 70s.
$$
WYZ300-051200-
Casper Mountain-
346 AM MDT Thu Sep 4 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke through the day.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......2 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....Northwest around 10 mph until 1200, then north
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1200, then around
25 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....38-43.
24 hr trend......14 degrees cooler.
Max humidity........61-67 percent.
24 hr trend......18 percent wetter.
Humidity recovery...Good.
20-foot winds.......Northeast winds 15 to 20 mph with gusts to
around 30 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northeast around 20 mph until 2400, then around
10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 20 mph until 2400, then around
10 mph.
Mixing Height.......800-2800 ft agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......12 degrees cooler.
Min humidity........34-40 percent.
24 hr trend......10 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 10 mph.
Ridge top winds.....North 5 to 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3800-5000 ft
agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Clear. Lows around 40. Winds generally less than
10 mph.
.SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the upper
60s. Winds generally less than 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
Southwest winds around 10 mph.
.MONDAY...Partly cloudy. Lows around 50. Highs in the lower 70s.
Southwest winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
.WEDNESDAY...Partly cloudy. Highs in the lower 70s.
$$