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

LYONS VALLEY (COWC1)

Lat: 39.12583°NLon: 123.07333°WElev: 3355.0ft.

41°F

5°C

Humidity	98%
Wind Speed	SSW 21 MPH
Barometer	NA
Dewpoint	40°F (4°C)
Visibility	NA
Wind Chill	32°F (0°C)
Last update	25 Dec 04:01 AM PST

More Information:

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

Extended Forecast for

5 Miles SW Lakeport CA

Flood Watch December 25, 04:30am until December 26, 10:00pm

Wind Advisory December 25, 04:30am until December 25, 10:00am

Click here for hazard details and duration

Flood Watch

Wind Advisory

Flood Watch December 25, 04:30am until December 26, 10:00pm
Wind Advisory December 25, 04:30am until December 25, 10:00am
NOW: Multiple hazards in effect
Click HERE for Details
Overnight
Low: 43 °F
Showers and
Windy
Christmas Day
High: 46 °F
Showers and
Windy
Thursday Night
Low: 41 °F
Showers and
Windy
Friday
High: 45 °F
Rain and
Windy
Friday Night
Low: 41 °F
Rain Likely
then Chance
Rain
Saturday
High: 45 °F
Slight Chance
Rain then
Sunny
Saturday Night
Low: 39 °F
Mostly Clear
Sunday
High: 50 °F
Mostly Sunny

Detailed Forecast

Overnight

Showers and possibly a thunderstorm. Low around 43. Windy, with a south wind around 25 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Christmas Day

Showers and possibly a thunderstorm before 10am, then rain between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 46. Windy, with a south southwest wind 22 to 25 mph, with gusts as high as 50 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 before 7pm, then rain after 7pm. Low around 41. Windy, with a south wind 18 to 24 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Friday

Rain and possibly a thunderstorm. High near 45. Windy, with a south wind 14 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night

Rain likely, mainly before 10pm. Mostly cloudy, with a low around 41. East southeast wind 10 to 14 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A 20 percent chance of rain before 10am. Mostly sunny, with a high near 45. North wind around 6 mph.

Saturday Night

Mostly clear, with a low around 39.

Sunday

Mostly sunny, with a high near 50.

Sunday Night

Mostly clear, with a low around 40.

Monday

Sunny, with a high near 55.

Monday Night

Mostly clear, with a low around 43.