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

Atmospheric River to Begin to Impact the Northwest U.S.; Gusty Winds in the Northeast U.S.

A strong atmospheric river moving into northern California later Tuesday will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through at least Wednesday. Gusty winds and isolated rain and snow showers will continue in the Northeast U.S. Tuesday behind a cold front. Read More >

Hazardous Weather Conditions

Current conditions at

LYONS VALLEY (COWC1)

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

NA

50°F

10°C

Humidity 98%
Wind Speed WSW 13 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Wind Chill45°F (7°C)
Last update 03 Nov 07:01 PM PST
Extended Forecast for

11 Miles NNW Lakeport CA

Flood Watch November 5, 12:00am until November 5, 10:00am
Wind Advisory November 4, 07:00pm until November 5, 12:00pm
Click here for hazard details and duration
Flood Watch
Wind Advisory

  • Tonight

    Tonight: Rain likely, mainly after 10pm. Patchy fog between 10pm and 1am. Otherwise, cloudy, with a low around 48. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday

    Tuesday: Rain likely, mainly before 10am. Cloudy, with a high near 61. Southeast wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 61 °F

    Rain Likely
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly after 10pm. Low around 46. Breezy, with a south southeast wind 18 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.

    Low: 46 °F

    Rain and
    Breezy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 4pm, then rain likely and possibly a thunderstorm after 4pm. High near 58. Southwest wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 58 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43. South wind 3 to 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Rain Likely
    then Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 63. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 63 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Rain

  • Friday

    Friday: A chance of rain. Partly sunny, with a high near 62.

    High: 62 °F

    Chance Rain

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain likely, mainly after 10pm. Patchy fog between 10pm and 1am. Otherwise, cloudy, with a low around 48. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain likely, mainly before 10am. Cloudy, with a high near 61. Southeast wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain, mainly after 10pm. Low around 46. Breezy, with a south southeast wind 18 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.
Wednesday
Showers and possibly a thunderstorm before 4pm, then rain likely and possibly a thunderstorm after 4pm. High near 58. Southwest wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 43. South wind 3 to 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 63. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 44.
Friday
A chance of rain. Partly sunny, with a high near 62.
Friday Night
Mostly cloudy, with a low around 44.
Saturday
Partly sunny, with a high near 70.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 46.
Sunday
A chance of rain. Mostly cloudy, with a high near 67.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 47.
Monday
A chance of rain. Partly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles NNW Lakeport CA
 39.2°N 122.99°W (Elev. 1801 ft)
Last Update:
1:20 pm PST Nov 3, 2025
Forecast Valid:
7pm PST Nov 3, 2025-6pm PST Nov 10, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation