Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

41°F

5°C

Humidity	67%
Wind Speed	SSW 13 MPH
Barometer	NA
Dewpoint	31°F (-1°C)
Visibility	NA
Wind Chill	34°F (1°C)
Last update	09 Dec 12:15 PM MST

More Information:

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

Extended Forecast for

Mammoth WY

Winter Storm Warning December 9, 01:17pm until December 10, 05:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 9, 01:17pm until December 10, 05:00pm
NOW until 5:00pm Wed
Winter Storm Warning
This Afternoon
High: 45 °F
Scattered
Rain/Snow and
Breezy
Tonight
Low: 33 °F
Scattered
Snow Showers
then
Rain/Snow
Wednesday
High: 47 °F
Rain/Snow
Likely then
Scattered
Showers and
Breezy
Wednesday Night
Low: 39 °F
Slight Chance
Showers then
Mostly Cloudy
Thursday
High: 45 °F
Chance
Showers
Thursday Night
Low: 38 °F
Chance
Showers
Friday
High: 44 °F
Chance
Showers then
Slight Chance
Showers
Friday Night
Low: 32 °F
Mostly Cloudy

Detailed Forecast

This Afternoon

Scattered rain and snow showers. Snow level 6900 feet lowering to 5900 feet. Mostly cloudy, with a high near 45. Breezy, with a west wind 13 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.

Tonight

Snow showers likely before 3am, then rain and snow showers. Low around 33. West southwest wind 8 to 10 mph becoming south southeast after midnight. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Wednesday

Rain showers likely before 7am, then rain and snow showers likely between 7am and 8am, then rain showers likely after 8am. Mostly cloudy, with a high near 47. Breezy, with a southwest wind 11 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Wednesday Night

A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 39. South southwest wind 11 to 13 mph.

Thursday

A 30 percent chance of showers, mainly after 11am. Mostly cloudy, with a high near 45. Southwest wind around 10 mph.

Thursday Night

A 50 percent chance of showers. Mostly cloudy, with a low around 38. Southwest wind around 9 mph.

Friday

A 50 percent chance of showers, mainly before 11am. Mostly cloudy, with a high near 44. Southwest wind 8 to 10 mph.

Friday Night

Mostly cloudy, with a low around 32.

Saturday

A slight chance of rain and snow showers before 11am. Snow level rising to 6300 feet in the afternoon. Partly sunny, with a high near 43. Chance of precipitation is 20%.

Saturday Night

Partly cloudy, with a low around 27.

Sunday

Mostly sunny, with a high near 44.

Sunday Night

Partly cloudy, with a low around 27.

Monday

Mostly sunny, with a high near 43.