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

Heavy to Excessive Rainfall and Flooding Threats in the Central and Eastern U.S.; Heat and Fire Weather Concerns in the West

Thunderstorms producing excessive rainfall and potential flooding concerns will continue through tonight from the Southern Plains to the East Coast. Areas of greatest concern for flooding are over central Texas and the Mid-Atlantic. Heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue through Monday. Read More >

Hazardous Weather Conditions

Current conditions at

LYONS VALLEY (COWC1)

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

NA

78°F

26°C

Humidity 31%
Wind Speed NW 11 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Heat Index78°F (26°C)
Last update 13 Jul 11:01 PM PDT
Extended Forecast for

4 Miles SE Hopland CA

Heat Advisory July 13, 11:43pm until July 14, 11:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 13, 11:43pm until July 14, 11:00pm

    NOW until 11:00pm Mon

    Heat Advisory

  • Tonight

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 96. Light south wind increasing to 5 to 10 mph in the afternoon.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 56. South wind 6 to 9 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 88 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 5am. Otherwise, mostly clear, with a low around 54. South southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 54 °F

    Clear then
    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 86.

    High: 86 °F

    Patchy Fog
    then Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. South wind 3 to 6 mph.
Monday
Sunny, with a high near 96. Light south wind increasing to 5 to 10 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 56. South wind 6 to 9 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Tuesday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 54. South southwest wind 5 to 8 mph becoming calm in the evening.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 86.
Thursday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 52.
Friday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Hopland CA
 38.94°N 123.06°W (Elev. 597 ft)
Last Update:
7:41 pm PDT Jul 13, 2025
Forecast Valid:
11pm PDT Jul 13, 2025-6pm PDT Jul 20, 2025
 
Forecast Discussion
 
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Additional Resources

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