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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

LYONS VALLEY (COWC1)

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

NA

80°F

27°C

Humidity 16%
Wind Speed N 6 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Heat Index78°F (26°C)
Last update 02 Aug 04:01 AM PDT
Extended Forecast for

5 Miles SE Hopland CA

Heat Advisory August 3, 11:00am until August 4, 11:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Patchy smoke. Sunny and hot, with a high near 100. Northeast wind 6 to 10 mph becoming northwest in the afternoon.

    High: 100 °F

    Patchy Smoke

  • Tonight

    Tonight: Patchy smoke before 11pm. Mostly clear, with a low around 62. Northwest wind 5 to 11 mph becoming northeast in the evening.

    Low: 62 °F

    Patchy Smoke
    then Mostly
    Clear

  • Monday

    Monday: Sunny and hot, with a high near 102. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 102 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 64. West southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 60. Southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

Detailed Forecast

Today
Patchy smoke. Sunny and hot, with a high near 100. Northeast wind 6 to 10 mph becoming northwest in the afternoon.
Tonight
Patchy smoke before 11pm. Mostly clear, with a low around 62. Northwest wind 5 to 11 mph becoming northeast in the evening.
Monday
Sunny and hot, with a high near 102. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Monday Night
Clear, with a low around 64. West southwest wind 5 to 8 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 100. Calm wind becoming south 5 to 7 mph in the afternoon.
Tuesday Night
Clear, with a low around 60. Southwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 98.
Thursday Night
Clear, with a low around 62.
Friday
Sunny and hot, with a high near 100.
Friday Night
Clear, with a low around 64.
Saturday
Sunny and hot, with a high near 100.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Hopland CA
 38.91°N 123.06°W (Elev. 889 ft)
Last Update:
2:21 am PDT Aug 2, 2026
Forecast Valid:
4am PDT Aug 2, 2026-6pm PDT Aug 8, 2026
 
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