Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

36°F

2°C

Humidity	70%
Wind Speed	S 12 MPH
Barometer	NA
Dewpoint	27°F (-3°C)
Visibility	NA
Wind Chill	28°F (-2°C)
Last update	08 Dec 09:15 PM MST

More Information:

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

Extended Forecast for

3 Miles WNW Mammoth Hot Springs WY

Winter Storm Warning until December 10, 05:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning until December 10, 05:00pm
NOW until 5:00pm Wed
Winter Storm Warning
Tonight
Low: 30 °F
Snow Showers
Likely and
Areas Blowing
Snow
Tuesday
High: 34 °F
Snow Showers
and Patchy
Blowing Snow
Tuesday Night
Low: 26 °F
Snow Showers
and Breezy
Wednesday
High: 38 °F
Rain/Snow and
Breezy
Wednesday Night
Low: 32 °F
Chance
Rain/Snow and
Windy
Thursday
High: 35 °F
Snow Showers
Likely and
Breezy
Thursday Night
Low: 32 °F
Chance Snow
Showers and
Breezy
Friday
High: 34 °F
Chance Snow
Showers

Detailed Forecast

Tonight

Snow showers likely, mainly after 3am. Areas of blowing snow. Mostly cloudy, with a steady temperature around 30. Windy, with a southwest wind 20 to 29 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

Tuesday

Snow showers, mainly before 3pm. Patchy blowing snow before 9am. High near 34. Breezy, with a southwest wind 11 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Tuesday Night

Snow showers, mainly after 11pm. Low around 26. Breezy, with a southwest wind 13 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

Wednesday

Snow showers before 11am, then rain and snow showers likely. High near 38. Breezy, with a west southwest wind 15 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Wednesday Night

A chance of rain and snow showers before 2am, then a chance of snow showers. Snow level 8100 feet. Mostly cloudy, with a low around 32. Windy, with a southwest wind 22 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

Thursday

Snow showers likely, mainly after 11am. Mostly cloudy, with a high near 35. Breezy, with a southwest wind 13 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

Thursday Night

A 50 percent chance of snow showers. Mostly cloudy, with a low around 32. Breezy, with a west southwest wind around 16 mph, with gusts as high as 25 mph.

Friday

A 40 percent chance of snow showers, mainly before 11am. Mostly cloudy, with a high near 34.

Friday Night

Mostly cloudy, with a low around 29. Breezy.

Saturday

Partly sunny, with a high near 33. Breezy.

Saturday Night

Partly cloudy, with a low around 23. Breezy.

Sunday

Partly sunny, with a high near 32. Breezy.

Sunday Night

Mostly cloudy, with a low around 24. Breezy.