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

Mammoth Yosemite Airport (KMMH)

Lat: 37.6241°NLon: 118.8423°WElev: 7112.0ft.

heavy snow,freezing fog

30°F

-1°C

Humidity	100%
Wind Speed	NE 4 MPH
Barometer	29.94 in (1013.89 mb)
Dewpoint	30°F (-1°C)
Visibility	-0.25 mi
Wind Chill	26°F (-3°C)
Last update	25 Dec 09:55 AM PST

More Information:

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

Extended Forecast for

6 Miles ESE Mammoth Lakes CA

Winter Storm Warning December 25, 10:17am until December 26, 10:00am

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 25, 10:17am until December 26, 10:00am
NOW until 10:00am Fri
Winter Storm Warning
Christmas Day
High: 38 °F
Heavy Snow
and Breezy
Tonight
Low: 26 °F
Heavy Snow
and Breezy
Friday
High: 38 °F
Heavy Snow
and Breezy
Friday Night
Low: 11 °F
Chance Snow
Saturday
High: 36 °F
Slight Chance
Snow
Saturday Night
Low: 8 °F
Mostly Clear
Sunday
High: 40 °F
Sunny
Sunday Night
Low: 11 °F
Mostly Clear

Detailed Forecast

Christmas Day

Snow. The snow could be heavy at times. High near 38. Breezy, with a south wind around 25 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 4 to 8 inches possible.

Tonight

Snow. The snow could be heavy at times. Low around 26. Breezy, with a south wind 20 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

Friday

Snow, mainly before 4pm. The snow could be heavy at times. High near 38. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday Night

A 40 percent chance of snow, mainly before 10pm. Partly cloudy, with a low around 11. Southwest wind 5 to 10 mph. Little or no snow accumulation expected.

Saturday

A 20 percent chance of snow. Mostly sunny, with a high near 36. West wind around 5 mph becoming north in the afternoon.

Saturday Night

Mostly clear, with a low around 8. West wind around 5 mph.

Sunday

Sunny, with a high near 40.

Sunday Night

Mostly clear, with a low around 11.

Monday

Sunny, with a high near 46.

Monday Night

Mostly clear, with a low around 16.