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.

37°F

3°C

Humidity	71%
Wind Speed	S 15 MPH
Barometer	NA
Dewpoint	28°F (-2°C)
Visibility	NA
Wind Chill	28°F (-2°C)
Last update	09 Dec 02:15 AM MST

More Information:

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

Extended Forecast for

5 Miles N Mount Holmes 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
Overnight
Low: 27 °F
Heavy Snow
and Blowing
Snow
Tuesday
High: 31 °F
Heavy Snow
and Areas
Blowing Snow
Tuesday Night
Low: 24 °F
Breezy.
Chance Snow
then Heavy
Snow
Wednesday
High: 33 °F
Breezy. Snow
then Chance
Snow
Wednesday Night
Low: 26 °F
Chance Snow
and Windy
Thursday
High: 30 °F
Chance Snow
and Breezy
Thursday Night
Low: 27 °F
Chance Snow
and Breezy
Friday
High: 29 °F
Chance Snow
and Breezy

Detailed Forecast

Overnight

Snow, mainly after 4am. The snow could be heavy at times. Widespread blowing snow, mainly after 5am. Steady temperature around 27. Windy, with a west southwest wind around 30 mph, with gusts as high as 49 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 2 to 4 inches possible.

Tuesday

Snow, mainly before 2pm. The snow could be heavy at times. Areas of blowing snow before 4pm. High near 31. Windy, with a west southwest wind 20 to 28 mph, with gusts as high as 47 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.

Tuesday Night

Snow, mainly after 1am. The snow could be heavy at times. Low around 24. Breezy, with a west southwest wind 15 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Wednesday

Snow, mainly before noon. High near 33. Breezy, with a southwest wind 21 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

Wednesday Night

A 30 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 26. Windy, with a southwest wind 24 to 28 mph, with gusts as high as 46 mph.

Thursday

A 40 percent chance of snow. Mostly cloudy, with a high near 30. Breezy, with a southwest wind 18 to 24 mph, with gusts as high as 39 mph.

Thursday Night

A 50 percent chance of snow. Cloudy, with a low around 27. Breezy, with a southwest wind 17 to 21 mph, with gusts as high as 36 mph.

Friday

A 40 percent chance of snow. Mostly cloudy, with a high near 29. Breezy.

Friday Night

Mostly cloudy, with a low around 24. Breezy.

Saturday

Partly sunny, with a high near 27. Breezy.

Saturday Night

Mostly cloudy, with a low around 18. Breezy.