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 15%
Wind Speed NNW 9 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Heat Index78°F (26°C)
Last update 02 Aug 03:01 AM PDT
Extended Forecast for

2 Miles N Hopland CA

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

  • Overnight

    Overnight: Patchy smoke. Mostly clear, with a low around 56. Northwest wind around 5 mph.

    Low: 56 °F

    Patchy Smoke

  • Sunday

    Sunday: Patchy smoke. Sunny and hot, with a high near 100. Light northwest wind becoming west northwest 6 to 11 mph in the morning.

    High: 100 °F

    Patchy Smoke

  • Sunday Night

    Sunday Night: Patchy smoke before 11pm. Mostly clear, with a low around 59. West northwest wind 6 to 11 mph becoming light northwest in the evening.

    Low: 59 °F

    Patchy Smoke
    then Mostly
    Clear

  • Monday

    Monday: Sunny and hot, with a high near 105. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 105 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 64. West wind 5 to 9 mph becoming calm in the evening.

    Low: 64 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 103. Calm wind becoming south southwest 5 to 8 mph in the afternoon.

    High: 103 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

Detailed Forecast

Overnight
Patchy smoke. Mostly clear, with a low around 56. Northwest wind around 5 mph.
Sunday
Patchy smoke. Sunny and hot, with a high near 100. Light northwest wind becoming west northwest 6 to 11 mph in the morning.
Sunday Night
Patchy smoke before 11pm. Mostly clear, with a low around 59. West northwest wind 6 to 11 mph becoming light northwest in the evening.
Monday
Sunny and hot, with a high near 105. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Monday Night
Clear, with a low around 64. West wind 5 to 9 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 103. Calm wind becoming south southwest 5 to 8 mph in the afternoon.
Tuesday Night
Clear, with a low around 61.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Clear, with a low around 62.
Friday
Sunny and hot, with a high near 102.
Friday Night
Clear, with a low around 63.
Saturday
Sunny and hot, with a high near 102.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Hopland CA
 39°N 123.11°W (Elev. 489 ft)
Last Update:
2:21 am PDT Aug 2, 2026
Forecast Valid:
3am PDT Aug 2, 2026-6pm PDT Aug 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation