Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

32°F

0°C

Humidity	69%
Wind Speed	S 8 MPH
Barometer	NA
Dewpoint	23°F (-5°C)
Visibility	NA
Wind Chill	25°F (-4°C)
Last update	08 Dec 03:15 AM MST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

14 Miles NW Mount Holmes WY

Winter Storm Warning December 8, 05:00pm until December 10, 05:00pm

Click here for hazard details and duration

Winter Storm Warning

Today
High: 29 °F
Mostly Cloudy
then Chance
Snow
Tonight
Low: 24 °F⇑
Snow Likely
and Breezy
Tuesday
High: 34 °F
Snow
Tuesday Night
Low: 27 °F
Snow
Wednesday
High: 37 °F
Rain/Snow
Wednesday Night
Low: 32 °F
Rain/Snow
Likely
Thursday
High: 37 °F
Chance Snow
Thursday Night
Low: 29 °F
Chance Snow
Friday
High: 36 °F
Chance Snow

Detailed Forecast

Today

A 30 percent chance of snow, mainly after 3pm. Mostly cloudy, with a high near 29. South wind 7 to 11 mph.

Tonight

Snow likely, mainly after 8pm. Cloudy, with a temperature rising to around 29 by 2am. Breezy, with a south southwest wind around 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

Tuesday

Snow. High near 34. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Tuesday Night

Snow. Low around 27. South southwest wind 7 to 9 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Wednesday

Snow before 8am, then rain, possibly mixed with snow. Snow level rising to 8100 feet in the afternoon. High near 37. Southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

Wednesday Night

Rain and snow likely before 11pm, then a chance of snow between 11pm and 2am, then a chance of rain and snow after 2am. Snow level 7900 feet. Mostly cloudy, with a low around 32. West southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

Thursday

A 50 percent chance of snow. Mostly cloudy, with a high near 37. Southwest wind 8 to 10 mph.

Thursday Night

A 40 percent chance of snow. Mostly cloudy, with a low around 29.

Friday

A 30 percent chance of snow, mainly before 11am. Partly sunny, with a high near 36.

Friday Night

Mostly cloudy, with a low around 24.

Saturday

Partly sunny, with a high near 36.

Saturday Night

Partly cloudy, with a low around 21.