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.

49°F

9°C

Humidity	82%
Wind Speed	SSW 9 MPH
Barometer	NA
Dewpoint	44°F (7°C)
Visibility	NA
Wind Chill	45°F (7°C)
Last update	25 Dec 02:26 AM PST

More Information:

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

Extended Forecast for

20 Miles NNE Lakeport CA

Flood Watch December 25, 03:05am 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, 03:05am until December 26, 04:00pm
Winter Storm Warning until December 26, 10:00pm
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 37 °F
Rain/Snow and
Windy
Christmas Day
High: 36 °F
Snow and
Windy
Thursday Night
Low: 33 °F
Heavy Snow
and Windy
Friday
High: 36 °F
Snow and
Windy
Friday Night
Low: 32 °F
Chance Snow
Saturday
High: 35 °F
Slight Chance
Snow
Saturday Night
Low: 32 °F
Mostly Clear
Sunday
High: 40 °F
Mostly Sunny

Detailed Forecast

Overnight

Rain and snow showers. The rain could be heavy at times. Some thunder is also possible. Steady temperature around 37. Windy, with a south southeast wind around 43 mph, with gusts as high as 65 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of less than one inch possible.

Christmas Day

Snow. Some thunder is also possible. High near 36. Windy, with a south southwest wind 34 to 41 mph, with gusts as high as 60 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

Thursday Night

Snow showers before 1am, then snow after 1am. The snow could be heavy at times. Some thunder is also possible. Low around 33. Windy, with a south southwest wind 34 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 7 inches possible.

Friday

Snow. High near 36. Windy, with a south southwest wind 25 to 33 mph, with gusts as high as 47 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

Friday Night

A 50 percent chance of snow. Mostly cloudy, with a low around 32. West wind around 14 mph, with gusts as high as 21 mph. New snow accumulation of less than a half inch possible.

Saturday

A 20 percent chance of snow. Mostly sunny, with a high near 35.

Saturday Night

Mostly clear, with a low around 32.

Sunday

Mostly sunny, with a high near 40.

Sunday Night

Clear, with a low around 34.

Monday

Sunny, with a high near 45.

Monday Night

Clear, with a low around 39.