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.

35°F

2°C

Humidity	98%
Wind Speed	NNW 1 MPH
Barometer	NA
Dewpoint	34°F (1°C)
Visibility	NA
Last update	26 Dec 12:52 AM PST

More Information:

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

Extended Forecast for

16 Miles NE Happy Camp CA

Winter Storm Warning December 26, 01:50am until December 26, 04:00pm

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning December 26, 01:50am until December 26, 04:00pm
NOW until 4:00pm Fri
Winter Storm Warning
Overnight
Low: 33 °F
Rain/Snow
Friday
High: 39 °F
Rain/Snow
Friday Night
Low: 29 °F
Rain/Snow
Likely then
Mostly Cloudy
Saturday
High: 36 °F
Chance Snow
Saturday Night
Low: 25 °F
Mostly Cloudy
Sunday
High: 42 °F
Mostly Sunny
Sunday Night
Low: 29 °F
Partly Cloudy
Monday
High: 46 °F
Sunny

Detailed Forecast

Overnight

Rain and snow, mainly after 4am. Snow level 3800 feet. Low around 33. South wind around 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.

Friday

Rain and snow. Snow level 3800 feet. High near 39. South southwest wind 7 to 10 mph becoming west northwest in the afternoon. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Friday Night

Rain and snow likely before 10pm, then a chance of snow between 10pm and midnight. Mostly cloudy, with a low around 29. North wind 6 to 8 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Saturday

A 40 percent chance of snow. Partly sunny, with a high near 36. North wind around 7 mph. Little or no snow accumulation expected.

Saturday Night

Mostly cloudy, with a low around 25. East wind around 6 mph.

Sunday

Mostly sunny, with a high near 42.

Sunday Night

Partly cloudy, with a low around 29.

Monday

Sunny, with a high near 46.

Monday Night

Partly cloudy, with a low around 33.