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

Winter Storm Warning until December 26, 04:00 PM PST

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10375°NLon: 123.68508°WElev: 1389.0ft.

41°F

5°C

Humidity	98%
Wind Speed	SW 5 MPH
Barometer	NA
Dewpoint	40°F (4°C)
Visibility	NA
Wind Chill	38°F (3°C)
Last update	25 Dec 09:52 PM PST

More Information:

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

Extended Forecast for

12 Miles W Happy Camp CA

Winter Storm Warning December 25, 10:45pm until December 26, 04:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 25, 10:45pm until December 26, 04:00pm
NOW until 4:00pm Fri
Winter Storm Warning
Tonight
Low: 30 °F
Snow Showers
Friday
High: 33 °F
Snow Showers
Friday Night
Low: 27 °F
Snow then
Chance Snow
Saturday
High: 32 °F
Chance Snow
Saturday Night
Low: 25 °F
Mostly Cloudy
Sunday
High: 37 °F
Mostly Sunny
Sunday Night
Low: 29 °F
Partly Cloudy
Monday
High: 42 °F
Sunny

Detailed Forecast

Tonight

Snow showers. Low around 30. South wind around 21 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 5 inches possible.

Friday

Snow showers, mainly before 2pm, then snow after 4pm. High near 33. South southeast wind 9 to 17 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday Night

Snow, mainly before 10pm. Low around 27. Northwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

Saturday

A 40 percent chance of snow. Partly sunny, with a high near 32. North wind 6 to 8 mph. Little or no snow accumulation expected.

Saturday Night

Mostly cloudy, with a low around 25. East wind 11 to 13 mph, with gusts as high as 20 mph.

Sunday

Mostly sunny, with a high near 37.

Sunday Night

Partly cloudy, with a low around 29.

Monday

Sunny, with a high near 42.

Monday Night

Partly cloudy, with a low around 33.