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

Current conditions at

Top of 22 (MTH02)

Lat: 37.63707°NLon: 119.0174°WElev: 10100.0ft.

23°F

-5°C

Humidity	97%
Wind Speed	SSE 36 MPH
Barometer	NA
Dewpoint	22°F (-6°C)
Visibility	NA
Wind Chill	4°F (-16°C)
Last update	25 Dec 04:25 PM PST

More Information:

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

Extended Forecast for

3 Miles NW Mammoth Lakes CA

Winter Storm Warning December 25, 04:39pm until December 26, 10:00am

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 25, 04:39pm until December 26, 10:00am
NOW until 10:00am Fri
Winter Storm Warning
Christmas Day
High: 30 °F
Heavy Snow
and Windy
Tonight
Low: 25 °F
Heavy Snow
and Windy
Friday
High: 29 °F
Heavy Snow
and Breezy
Friday Night
Low: 13 °F
Chance Snow
then Slight
Chance Snow
Saturday
High: 29 °F
Sunny
Saturday Night
Low: 14 °F
Mostly Clear
Sunday
High: 32 °F
Sunny
Sunday Night
Low: 19 °F
Mostly Clear

Detailed Forecast

Christmas Day

Snow showers. The snow could be heavy at times. Some thunder is also possible. High near 30. Windy, with a southwest wind around 30 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 16 to 22 inches possible.

Tonight

Snow showers before 7pm, then snow between 7pm and 10pm, then snow showers after 10pm. The snow could be heavy at times. Some thunder is also possible. Low around 25. Windy, with a southwest wind around 30 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New snow accumulation of 13 to 19 inches possible.

Friday

Snow, mainly before 4pm. The snow could be heavy at times. High near 29. Breezy, with a southwest wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of 8 to 12 inches possible.

Friday Night

A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 13. Southwest wind 5 to 10 mph. New snow accumulation of less than one inch possible.

Saturday

Sunny, with a high near 29. Northwest wind around 5 mph.

Saturday Night

Mostly clear, with a low around 14. West wind 5 to 10 mph.

Sunday

Sunny, with a high near 32.

Sunday Night

Mostly clear, with a low around 19.

Monday

Sunny, with a high near 37.

Monday Night

Mostly clear, with a low around 25.