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.

22°F

-6°C

Humidity	96%
Wind Speed	SSE 26 MPH
Barometer	NA
Dewpoint	21°F (-6°C)
Visibility	NA
Wind Chill	5°F (-15°C)
Last update	25 Dec 07:25 AM PST

More Information:

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

Extended Forecast for

2 Miles NW Mammoth Lakes CA

Winter Storm Warning December 25, 07:39am until December 26, 10:00am

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 25, 07:39am until December 26, 10:00am
NOW until 10:00am Fri
Winter Storm Warning
Christmas Day
High: 34 °F
Heavy Snow
and Patchy
Freezing Fog
Tonight
Low: 24 °F
Heavy Snow
and Patchy
Dense
Freezing Fog
Friday
High: 33 °F
Heavy Snow
and Patchy
Dense
Freezing Fog
Friday Night
Low: 10 °F
Chance Snow
then Slight
Chance Snow
Saturday
High: 33 °F
Slight Chance
Snow
Saturday Night
Low: 8 °F
Mostly Clear
Sunday
High: 37 °F
Sunny
Sunday Night
Low: 14 °F
Mostly Clear

Detailed Forecast

Christmas Day

Snow. The snow could be heavy at times. Patchy freezing fog before 10am. High near 34. Breezy, with a southwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 13 to 19 inches possible.

Tonight

Snow showers before 10pm, then snow after 10pm. The snow could be heavy at times. Some thunder is also possible. Patchy fog after 5am. Patchy dense freezing fog between midnight and 1am. Low around 24. Breezy, with a southwest wind around 25 mph, with gusts as high as 60 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 16 inches possible.

Friday

Snow, mainly before 4pm. The snow could be heavy at times. Patchy dense freezing fog before 9am. High near 33. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 45 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

Friday Night

A 50 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 10. Southwest wind 5 to 10 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.

Saturday

A 20 percent chance of snow. Mostly sunny, with a high near 33. West wind around 5 mph becoming calm.

Saturday Night

Mostly clear, with a low around 8. West wind around 5 mph, with gusts as high as 20 mph.

Sunday

Sunny, with a high near 37.

Sunday Night

Mostly clear, with a low around 14.

Monday

Sunny, with a high near 43.

Monday Night

Mostly clear, with a low around 20.