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

Alturas (KAAT)

Lat: 41.48362°NLon: 120.5615°WElev: 4383.0ft.

Overcast

39°F

4°C

Humidity	86%
Wind Speed	S 11 MPH
Barometer	29.6 in (1002.37 mb)
Dewpoint	36°F (2°C)
Visibility	10.00 mi
Wind Chill	32°F (0°C)
Last update	25 Dec 12:00 AM PST

More Information:

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

Extended Forecast for

8 Miles SSW Cedarville CA

Wind Advisory December 25, 01:00am until December 25, 01:00pm

Winter Storm Warning December 25, 12:22am until December 26, 10:00am

Click here for hazard details and duration

Wind Advisory

Winter Storm Warning

Winter Storm Warning December 25, 12:22am until December 26, 10:00am
NOW until 10:00am Fri
Winter Storm Warning
Overnight
Low: 27 °F
Chance Snow
Showers and
Breezy
Christmas Day
High: 29 °F
Snow Showers
and Windy
Thursday Night
Low: 20 °F
Heavy Snow
and Breezy
Friday
High: 26 °F
Snow Likely
and Breezy
Friday Night
Low: 21 °F
Snow Likely
then Chance
Snow
Saturday
High: 22 °F
Chance Snow
Saturday Night
Low: 16 °F
Partly Cloudy
Sunday
High: 24 °F
Mostly Sunny

Detailed Forecast

Overnight

A chance of snow showers before 1am, then a chance of snow showers after 4am. Partly cloudy, with a low around 27. Breezy, with a south wind 22 to 25 mph, with gusts as high as 38 mph. Chance of precipitation is 40%. Total nighttime snow accumulation of 1 to 2 inches possible.

Christmas Day

Snow showers. High near 29. Windy, with a south wind 32 to 37 mph decreasing to 25 to 30 mph in the morning. Winds could gust as high as 55 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Thursday Night

Snow showers before 3am, then a chance of snow showers after 4am. The snow could be heavy at times. Low around 20. Breezy, with a south wind 21 to 23 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

Friday

A chance of snow showers before 10am, then snow likely after 10am. Mostly cloudy, with a high near 26. Breezy, with a south southwest wind around 26 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

Friday Night

Snow likely, mainly before 10pm. Mostly cloudy, with a low around 21. West wind 18 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

Saturday

A 30 percent chance of snow, mainly before 10am. Partly sunny, with a high near 22. Little or no snow accumulation expected.

Saturday Night

Partly cloudy, with a low around 16.

Sunday

Mostly sunny, with a high near 24.

Sunday Night

Mostly clear, with a low around 18.

Monday

Sunny, with a high near 27.

Monday Night

Mostly clear, with a low around 23.