Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

LYONS VALLEY (COWC1)

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

NA

57°F

14°C

Humidity 27%
Wind Speed NNW 8 MPH
Barometer NA
Dewpoint 23°F (-5°C)
Visibility NA
Last update 07 Dec 08:01 PM PST
Extended Forecast for

11 Miles NNW Lakeport CA

  • Tonight

    Tonight: Patchy fog after 1am.  Otherwise, mostly clear, with a low around 36. North northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 7am.  Otherwise, sunny, with a high near 66. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. North northwest wind 6 to 8 mph.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 67. Light north wind becoming west northwest 5 to 10 mph in the morning.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42. North wind around 6 mph.

    Low: 42 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. West northwest wind 3 to 6 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 44.

    Low: 44 °F

    Clear

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 36. North northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Patchy fog before 7am. Otherwise, sunny, with a high near 66. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 37. North northwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 67. Light north wind becoming west northwest 5 to 10 mph in the morning.
Tuesday Night
Mostly clear, with a low around 42. North wind around 6 mph.
Wednesday
Sunny, with a high near 70. West northwest wind 3 to 6 mph.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 73.
Thursday Night
Clear, with a low around 44.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 41.
Sunday
Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NNW Lakeport CA
 39.2°N 122.96°W (Elev. 1555 ft)
1:10 pm PST Dec 7, 2025
8pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database