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.

36°F

2°C

Humidity	98%
Wind Speed	WSW 1 MPH
Barometer	NA
Dewpoint	35°F (2°C)
Visibility	NA
Last update	25 Dec 11:52 PM PST

More Information:

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

Extended Forecast for

13 Miles NE Happy Camp CA

Winter Storm Warning December 26, 12:19am until December 26, 04:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 26, 12:19am until December 26, 04:00pm
NOW until 4:00pm Fri
Winter Storm Warning
Overnight
Low: 28 °F
Snow Showers
Friday
High: 30 °F
Snow Showers
Friday Night
Low: 25 °F
Snow then
Chance Snow
Saturday
High: 27 °F
Chance Snow
Saturday Night
Low: 21 °F
Mostly Cloudy
Sunday
High: 33 °F
Mostly Sunny
Sunday Night
Low: 25 °F
Partly Cloudy
Monday
High: 37 °F
Sunny

Detailed Forecast

Overnight

Snow showers. Low around 28. South southwest wind around 21 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 2 to 4 inches possible.

Friday

Snow showers before 4pm, then snow after 4pm. High near 30. South southeast wind 10 to 16 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Friday Night

Snow, mainly before 10pm. Low around 25. North northwest wind 10 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 30 percent chance of snow. Partly sunny, with a high near 27. North wind around 10 mph. Little or no snow accumulation expected.

Saturday Night

Mostly cloudy, with a low around 21. East wind 8 to 10 mph.

Sunday

Mostly sunny, with a high near 33.

Sunday Night

Partly cloudy, with a low around 25.

Monday

Sunny, with a high near 37.

Monday Night

Partly cloudy, with a low around 30.