Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. 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.

44°F

7°C

Humidity	62%
Wind Speed	S 9 MPH
Barometer	NA
Dewpoint	32°F (0°C)
Visibility	NA
Wind Chill	39°F (4°C)
Last update	25 Dec 11:15 AM MST

More Information:

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

Extended Forecast for

14 Miles NW Mount Holmes WY

Christmas Day
High: 37 °F
Scattered
Snow Showers
and Breezy
Tonight
Low: 28 °F
Heavy Snow
and Patchy
Blowing Snow
Friday
High: 31 °F
Heavy Snow
and Patchy
Blowing Snow
Friday Night
Low: 16 °F
Snow Showers
Likely and
Breezy
Saturday
High: 22 °F
Snow
Saturday Night
Low: -4 °F
Slight Chance
Snow then
Mostly Clear
Sunday
High: 16 °F
Sunny
Sunday Night
Low: 2 °F
Partly Cloudy
Monday
High: 22 °F
Sunny

Detailed Forecast

Christmas Day

Scattered snow showers, mainly before 2pm. Partly sunny, with a high near 37. Breezy, with a south southwest wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%. Total daytime snow accumulation of less than one inch possible.

Tonight

Snow showers. The snow could be heavy at times. Patchy blowing snow before 2am, then patchy blowing snow after 5am. Low around 28. Breezy, with a south southwest wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

Friday

Snow showers, mainly before 1pm. The snow could be heavy at times. Patchy blowing snow between 9am and 4pm. High near 31. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

Friday Night

Snow showers likely, mainly between 9pm and 11pm, then snow likely after 11pm. Mostly cloudy, with a low around 16. Breezy, with a south southwest wind 10 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

Saturday

Snow. High near 22. Southwest wind 7 to 10 mph becoming west northwest in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Saturday Night

A 20 percent chance of snow before 11pm. Partly cloudy, with a low around -4. Northwest wind around 5 mph becoming calm in the evening.

Sunday

Sunny, with a high near 16. Calm wind becoming south southwest around 6 mph in the afternoon.

Sunday Night

Partly cloudy, with a low around 2.

Monday

Sunny, with a high near 22.

Monday Night

Mostly cloudy, with a low around 9.

Tuesday

Partly sunny, with a high near 29.