Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

Santa Rosa, Santa Rosa Sonoma County Airport (KSTS)

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

Rain

59°F

15°C

Humidity	87%
Wind Speed	S 13 MPH
Barometer	29.48 in (998.31 mb)
Dewpoint	55°F (13°C)
Visibility	9.00 mi
Last update	24 Dec 04:00 AM PST

More Information:

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

Extended Forecast for

4 Miles NE Calistoga CA

Flood Watch December 24, 04:23am until December 26, 10:00pm

Wind Advisory December 24, 04:23am until December 24, 08:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 24, 04:23am until December 26, 10:00pm
Wind Advisory December 24, 04:23am until December 24, 08:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 47 °F
Showers and
Breezy
Wednesday
High: 52 °F
Showers
Likely then
Severe
Thunderstorms
Wednesday Night
Low: 49 °F
Breezy.
Severe
Thunderstorms
then Showers
Christmas Day
High: 49 °F
Heavy Rain
and Breezy
Thursday Night
Low: 44 °F
Heavy Rain
Friday
High: 48 °F
Showers
Friday Night
Low: 43 °F
Showers
Likely
Saturday
High: 50 °F
Slight Chance
Showers then
Mostly Sunny

Detailed Forecast

Overnight

Showers. Low around 47. Breezy, with a south southwest wind around 28 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 52. Southwest wind 8 to 14 mph becoming southeast in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

Showers and possibly a thunderstorm. Some of the storms could be severe. Steady temperature around 49. Breezy, with a south wind 17 to 22 mph increasing to 24 to 29 mph after midnight. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Christmas Day

Showers and possibly a thunderstorm before 8am, then showers between 8am and 1pm, then showers and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. High near 49. Breezy, with a southwest wind 18 to 26 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 44. South southwest wind around 14 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Friday

Showers, with thunderstorms also possible after 10am. High near 48. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Friday Night

Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

Saturday

A slight chance of showers before 10am. Mostly sunny, with a high near 50.

Saturday Night

Mostly clear, with a low around 38.

Sunday

Sunny, with a high near 52.

Sunday Night

Mostly clear, with a low around 38.

Monday

Sunny, with a high near 54.

Monday Night

Mostly clear, with a low around 41.