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

Flood Watch until December 26, 10:00 PM PST

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

Lat: 38.5°NLon: 122.81667°WElev: 125.0ft.

Mostly Cloudy

51°F

11°C

Humidity	82%
Wind Speed	SSE 9 MPH
Barometer	29.84 in (1010.5 mb)
Dewpoint	46°F (8°C)
Visibility	10.00 mi
Last update	26 Dec 03:53 AM PST

More Information:

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

Extended Forecast for

5 Miles SSW Saint Helena CA

Flood Watch December 26, 04:01am until December 26, 10:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch December 26, 04:01am until December 26, 10:00pm
NOW until 10:00pm Fri
Flood Watch
Overnight
Low: 45 °F
Chance
Showers
Friday
High: 48 °F
Showers
Likely
Friday Night
Low: 42 °F
Chance
Showers
Saturday
High: 48 °F
Sunny
Saturday Night
Low: 40 °F
Mostly Clear
Sunday
High: 50 °F
Sunny
Sunday Night
Low: 39 °F
Mostly Clear
Monday
High: 52 °F
Sunny

Detailed Forecast

Overnight

A 30 percent chance of showers after 5am. Mostly cloudy, with a low around 45. South wind 11 to 13 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.

Friday

Showers likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 48. South wind 8 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night

A 40 percent chance of showers before 1am. Partly cloudy, with a low around 42. West northwest wind around 7 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday

Sunny, with a high near 48. North wind around 6 mph.

Saturday Night

Mostly clear, with a low around 40. North wind around 6 mph.

Sunday

Sunny, with a high near 50.

Sunday Night

Mostly clear, with a low around 39.

Monday

Sunny, with a high near 52.

Monday Night

Clear, with a low around 40.