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.

Rain

32°F

0°C

Humidity	92%
Wind Speed	ENE 17 MPH
Barometer	29.9 in (1012.53 mb)
Dewpoint	30°F (-1°C)
Visibility	10.00 mi
Wind Chill	21°F (-6°C)
Last update	25 Dec 04:15 PM PST

More Information:

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

Extended Forecast for

10 Miles ENE Mammoth Lakes CA

Winter Storm Warning December 25, 04:37pm until December 26, 10:00am

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 25, 04:37pm until December 26, 10:00am
NOW until 10:00am Fri
Winter Storm Warning
Christmas Day
High: 39 °F
Snow and
Breezy
Tonight
Low: 21 °F
Snow and
Areas
Freezing Fog
Friday
High: 39 °F
Snow and
Dense
Freezing Fog
Friday Night
Low: 7 °F
Chance Snow
Saturday
High: 38 °F
Sunny
Saturday Night
Low: 7 °F
Mostly Clear
Sunday
High: 40 °F
Becoming
Sunny
Sunday Night
Low: 9 °F
Mostly Clear

Detailed Forecast

Christmas Day

Snow. High near 39. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. Total daytime snow accumulation of 2 to 4 inches possible.

Tonight

Snow. Patchy fog before midnight, then areas of fog after 2am. Areas of freezing fog between midnight and 2am. Low around 21. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

Friday

Snow, mainly before 4pm. Widespread dense freezing fog, mainly between 9am and 10am. High near 39. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Friday Night

A 40 percent chance of snow, mainly before 10pm. Partly cloudy, with a low around 7. West wind 5 to 10 mph. Little or no snow accumulation expected.

Saturday

Sunny, with a high near 38. Calm wind.

Saturday Night

Mostly clear, with a low around 7. West wind around 5 mph.

Sunday

Partly sunny, then gradually becoming sunny, with a high near 40.

Sunday Night

Mostly clear, with a low around 9.

Monday

Sunny, with a high near 44.