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

Current conditions at

STONYFORD (SYWC1)

Lat: 39.35523°NLon: 122.65831°WElev: 1540.0ft.

46°F

8°C

Humidity	81%
Wind Speed	SW 10 MPH
Barometer	NA
Dewpoint	40°F (4°C)
Visibility	NA
Wind Chill	41°F (5°C)
Last update	25 Dec 07:26 AM PST

More Information:

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

Extended Forecast for

20 Miles N Clearlake CA

Flood Watch December 25, 07:47am until December 26, 04:00pm

Winter Storm Warning until December 26, 10:00pm

Click here for hazard details and duration

Flood Watch

Winter Storm Warning

Flood Watch December 25, 07:47am until December 26, 04:00pm
Winter Storm Warning until December 26, 10:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Christmas Day
High: 43 °F
Windy. Rain
Likely then
Showers
Tonight
Low: 41 °F
Rain and
Windy
Friday
High: 41 °F
Rain and
Breezy
Friday Night
Low: 36 °F
Chance Rain
then Slight
Chance
Rain/Snow
Saturday
High: 42 °F
Slight Chance
Rain/Snow
then Slight
Chance Rain
Saturday Night
Low: 35 °F
Mostly Clear
Sunday
High: 46 °F
Mostly Sunny
Sunday Night
Low: 37 °F
Clear

Detailed Forecast

Christmas Day

Rain, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 43. Windy, with a south wind 26 to 33 mph, with gusts as high as 47 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Tonight

Rain and thunderstorms before 1am, then rain likely. Steady temperature around 41. Windy, with a south southwest wind 28 to 30 mph, with gusts as high as 44 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

Friday

Rain, mainly before 4pm. High near 41. Breezy, with a south wind 21 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night

A chance of rain before 1am, then a slight chance of rain and snow. Mostly cloudy, with a low around 36. Southwest wind 8 to 10 mph becoming northwest after midnight. Chance of precipitation is 50%. Little or no snow accumulation expected.

Saturday

A slight chance of rain and snow before 10am, then a slight chance of rain. Mostly sunny, with a high near 42. North wind around 10 mph. Chance of precipitation is 20%.

Saturday Night

Mostly clear, with a low around 35.

Sunday

Mostly sunny, with a high near 46.

Sunday Night

Clear, with a low around 37.

Monday

Sunny, with a high near 50.

Monday Night

Clear, with a low around 39.

Tuesday

Sunny, with a high near 52.