Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10386°NLon: 123.68519°WElev: 1389.0ft.

NA

93°F

34°C

Humidity 19%
Wind Speed ESE 5 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Heat Index89°F (32°C)
Last update 04 Aug 12:52 PM PDT
Extended Forecast for

7 Miles NNE Happy Camp CA

Heat Advisory until August 6, 11:00pm
Red Flag Warning August 5, 02:00pm until August 5, 09:00pm
Click here for hazard details and duration
Heat Advisory
Red Flag Warning
  •  
    Heat Advisory until August 6, 11:00pm

    NOW until 11:00pm Thu

    Heat Advisory

  • This Afternoon

    High: 100 °F

    Hot

  • Tonight

    Tonight: Patchy smoke after 9pm. Clear, with a low around 63. North wind 5 to 7 mph becoming light and variable  after midnight.

    Low: 63 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke before noon. Sunny and hot, with a high near 98. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 98 °F

    Patchy Smoke
    then Sunny

  • Wednesday Night

    Wednesday Night: Patchy smoke between 1am and 3am. Clear, with a low around 63. West wind 5 to 9 mph becoming light and variable  in the evening.

    Low: 63 °F

    Clear then
    Patchy Smoke

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. Light and variable wind becoming west around 5 mph.
Tonight
Patchy smoke after 9pm. Clear, with a low around 63. North wind 5 to 7 mph becoming light and variable after midnight.
Wednesday
Patchy smoke before noon. Sunny and hot, with a high near 98. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Wednesday Night
Patchy smoke between 1am and 3am. Clear, with a low around 63. West wind 5 to 9 mph becoming light and variable in the evening.
Thursday
Sunny and hot, with a high near 98. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 63.
Friday
Sunny and hot, with a high near 98.
Friday Night
Clear, with a low around 61.
Saturday
Sunny, with a high near 93.
Saturday Night
Clear, with a low around 58.
Sunday
Sunny, with a high near 89.
Sunday Night
Clear, with a low around 57.
Monday
Sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles NNE Happy Camp CA
 41.89°N 123.29°W (Elev. 3491 ft)
1:01 pm PDT Aug 4, 2026
1pm PDT Aug 4, 2026-6pm PDT Aug 10, 2026
 
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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