Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

31°F

-1°C

Humidity	75%
Wind Speed	SSE 2 MPH
Barometer	NA
Dewpoint	24°F (-4°C)
Visibility	NA
Last update	07 Dec 09:15 PM MST

More Information:

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

Extended Forecast for

Mammoth Hot Springs WY

Tonight
Low: 28 °F
Scattered
Snow Showers
Monday
High: 39 °F
Mostly Cloudy
then Isolated
Snow Showers
and Breezy
Monday Night
Low: 37 °F
Rain/Snow
Likely and
Breezy
Tuesday
High: 42 °F
Rain/Snow and
Breezy
Tuesday Night
Low: 33 °F
Rain/Snow
Wednesday
High: 47 °F
Rain/Snow
then Showers
and Breezy
Wednesday Night
Low: 36 °F
Rain/Snow
Likely and
Breezy
Thursday
High: 43 °F
Rain/Snow
Likely
Thursday Night
Low: 31 °F
Chance
Rain/Snow

Detailed Forecast

Tonight

Scattered snow showers, mainly before 11pm. Mostly cloudy, with a low around 28. Southeast wind around 11 mph becoming southwest after midnight. Chance of precipitation is 30%.

Monday

Isolated snow showers after 2pm. Mostly cloudy, with a high near 39. Breezy, with a south wind 10 to 15 mph becoming west southwest in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 10%.

Monday Night

Snow showers likely before 8pm, then rain likely, possibly mixed with snow showers. Snow level rising to 6300 feet after midnight. Cloudy, with a low around 37. Breezy, with a southwest wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

Tuesday

Rain likely, possibly mixed with snow showers before 11am, then rain showers between 11am and 2pm, then rain, possibly mixed with snow showers after 2pm. Snow level 6400 feet. High near 42. Breezy, with a southwest wind 11 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Tuesday Night

Rain, possibly mixed with snow showers. Snow level 6000 feet rising to 6700 feet after midnight. Low around 33. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Wednesday

Rain, possibly mixed with snow showers, becoming all rain after 11am. High near 47. Breezy, with a west southwest wind 13 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 90%.

Wednesday Night

Rain and snow showers likely. Mostly cloudy, with a low around 36. Breezy, with a west wind around 15 mph, with gusts as high as 32 mph. Chance of precipitation is 70%.

Thursday

Rain and snow showers likely, mainly before 11am. Snow level 6600 feet. Mostly cloudy, with a high near 43. Chance of precipitation is 60%.

Thursday Night

A chance of rain and snow showers. Snow level 6200 feet. Mostly cloudy, with a low around 31. Chance of precipitation is 40%.

Friday

A chance of rain and snow showers, mainly before 11am. Snow level 6100 feet rising to 7000 feet in the afternoon. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.

Friday Night

Mostly cloudy, with a low around 32.

Saturday

Mostly sunny, with a high near 45.

Saturday Night

Partly cloudy, with a low around 28.

Sunday

Mostly sunny, with a high near 44.