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	37%
Wind Speed	W 4 MPH
Barometer	NA
Dewpoint	14°F (-10°C)
Visibility	NA
Wind Chill	35°F (2°C)
Last update	09 Dec 08:15 PM MST

More Information:

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

Extended Forecast for

2 Miles NE Norris WY

Winter Storm Warning December 9, 08:50pm until December 10, 05:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 9, 08:50pm until December 10, 05:00pm
NOW until 5:00pm Wed
Winter Storm Warning
Tonight
Low: 26 °F
Scattered
Snow Showers
then Snow
Showers
Wednesday
High: 40 °F
Rain/Snow
Wednesday Night
Low: 29 °F
Slight Chance
Rain/Snow
then Slight
Chance Snow
Showers
Thursday
High: 36 °F
Chance Snow
Showers
Thursday Night
Low: 29 °F
Chance Snow
Showers
Friday
High: 36 °F
Chance Snow
Showers
Friday Night
Low: 22 °F
Mostly Cloudy
Saturday
High: 36 °F
Slight Chance
Snow Showers
then Mostly
Sunny

Detailed Forecast

Tonight

Snow showers, mainly after midnight. Low around 26. Southwest wind 6 to 8 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 3 inches possible.

Wednesday

Rain and snow showers before 5pm, then scattered rain showers. Snow level rising to 8400 feet in the afternoon. High near 40. Southwest wind 10 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Wednesday Night

A slight chance of rain showers before 9pm, then a slight chance of rain and snow showers between 9pm and midnight, then a slight chance of snow showers after midnight. Snow level 8300 feet lowering to 7600 feet after midnight . Mostly cloudy, with a low around 29. Southwest wind around 10 mph. Chance of precipitation is 20%.

Thursday

A 30 percent chance of snow showers, mainly after 11am. Mostly cloudy, with a high near 36. Southwest wind 8 to 10 mph.

Thursday Night

A 50 percent chance of snow showers. Cloudy, with a low around 29. Southwest wind 6 to 8 mph. New snow accumulation of around an inch possible.

Friday

A 40 percent chance of snow showers, mainly before 11am. Mostly cloudy, with a high near 36. Southwest wind 6 to 10 mph.

Friday Night

Mostly cloudy, with a low around 22. Southwest wind 7 to 9 mph.

Saturday

A 20 percent chance of snow showers before 11am. Partly sunny, with a high near 36.

Saturday Night

Partly cloudy, with a low around 19.