National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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

KONOCTI (KELC1)

Lat: 38.91189°NLon: 122.70631°WElev: 2163.0ft.

NA

47°F

8°C

Humidity 75%
Wind Speed SW 20 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Wind Chill40°F (4°C)
Last update 25 Dec 11:57 AM PST
Extended Forecast for

Clearlake CA

Flood Watch December 25, 01:03pm until December 26, 10:00pm
Wind Advisory December 25, 01:03pm until December 26, 10:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 25, 01:03pm until December 26, 10:00pm
    Wind Advisory December 25, 01:03pm until December 26, 10:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Christmas Day

    High: 51 °F

    Showers and
    Breezy

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 39. Breezy, with a south southwest wind 10 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 39 °F

    Showers and
    Breezy

  • Friday

    Friday: Showers, with thunderstorms also possible after 4pm. High near 51. South wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 51 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 35. South southeast wind 5 to 9 mph becoming northeast after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 35 °F

    Chance
    Showers then
    Slight Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 51. Calm wind becoming north around 5 mph in the afternoon.

    High: 51 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

Detailed Forecast

Christmas Day
Showers and possibly a thunderstorm. High near 51. Breezy, with a south wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 39. Breezy, with a south southwest wind 10 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Showers, with thunderstorms also possible after 4pm. High near 51. South wind 11 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A chance of showers and thunderstorms. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 35. South southeast wind 5 to 9 mph becoming northeast after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 20 percent chance of showers before 10am. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 51. Calm wind becoming north around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 32. Calm wind.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Mostly clear, with a low around 37.
Wednesday
Sunny, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clearlake CA
 38.96°N 122.63°W (Elev. 1348 ft)
Last Update:
12:30 pm PST Dec 25, 2025
Forecast Valid:
1pm PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation