Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

38°F

3°C

Humidity	51%
Wind Speed	SW 2 MPH
Barometer	NA
Dewpoint	22°F (-6°C)
Visibility	NA
Last update	09 Dec 06:15 PM MST

More Information:

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

Extended Forecast for

10 Miles WNW Mount Holmes WY

Winter Storm Warning December 9, 06:42pm until December 10, 05:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 9, 06:42pm until December 10, 05:00pm
NOW until 5:00pm Wed
Winter Storm Warning
Tonight
Low: 27 °F
Scattered
Snow Showers
then Snow
Showers
Wednesday
High: 38 °F
Rain/Snow
Likely and
Breezy
Wednesday Night
Low: 31 °F
Slight Chance
Rain/Snow
then Mostly
Cloudy
Thursday
High: 36 °F
Chance Snow
Showers then
Chance
Rain/Snow
Thursday Night
Low: 31 °F
Chance
Rain/Snow
Friday
High: 35 °F
Chance
Rain/Snow
then Slight
Chance
Rain/Snow
Friday Night
Low: 25 °F
Mostly Cloudy
Saturday
High: 35 °F
Slight Chance
Snow Showers
then Mostly
Sunny

Detailed Forecast

Tonight

Snow showers, mainly after midnight. Low around 27. West southwest wind 7 to 11 mph becoming south in the evening. Chance of precipitation is 80%. Total nighttime snow accumulation of 2 to 4 inches possible.

Wednesday

Rain and snow showers likely before 5pm, then scattered rain showers. Snow level rising to 8200 feet in the afternoon. Mostly cloudy, with a high near 38. Breezy, with a south southwest wind around 15 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Wednesday Night

A slight chance of rain showers, mixing with snow after 9pm, then gradually ending. Snow level 8100 feet lowering to 7200 feet after midnight . Mostly cloudy, with a low around 31. South southwest wind 11 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Thursday

A chance of snow showers before 2pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 36. Southwest wind 10 to 13 mph. Chance of precipitation is 30%.

Thursday Night

A chance of rain and snow showers. Snow level 7400 feet. Cloudy, with a low around 31. Southwest wind around 9 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

Friday

A chance of snow showers before 11am, then a slight chance of rain and snow showers. Mostly cloudy, with a high near 35. South southwest wind 9 to 11 mph. Chance of precipitation is 50%.

Friday Night

Mostly cloudy, with a low around 25. South southwest wind around 11 mph.

Saturday

A 20 percent chance of snow showers before 11am. Partly sunny, with a high near 35.

Saturday Night

Partly cloudy, with a low around 21.

Sunday

Mostly sunny, with a high near 35.

Sunday Night

Mostly cloudy, with a low around 21.

Monday

Partly sunny, with a high near 34.