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

54°F

12°C

Humidity 62%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 04 Aug 03:52 AM PDT
Extended Forecast for

5 Miles NNW Cave Junction OR

Heat Advisory August 4, 11:00am until August 6, 11:00pm
Red Flag Warning August 4, 04:02am until August 4, 09:00pm
Red Flag Warning August 5, 02:00pm until August 5, 09:00pm
Click here for hazard details and duration
Heat Advisory
Red Flag Warning
Red Flag Warning
  •  
    Red Flag Warning August 4, 04:02am until August 4, 09:00pm

    NOW until 9:00pm Tue

    Red Flag Warning

  • Today

    High: 98 °F

    Areas Smoke

  • Tonight

    Tonight: Patchy smoke. Mostly clear, with a low around 63. North northeast wind 3 to 7 mph.

    Low: 63 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Light and variable wind.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 62. West wind 5 to 9 mph becoming calm  in the evening.

    Low: 62 °F

    Clear

  • Thursday

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

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

Detailed Forecast

Today
Areas of smoke before 2pm. Sunny and hot, with a high near 98. Northeast wind 5 to 7 mph.
Tonight
Patchy smoke. Mostly clear, with a low around 63. North northeast wind 3 to 7 mph.
Wednesday
Sunny and hot, with a high near 99. Light and variable wind.
Wednesday Night
Clear, with a low around 62. West wind 5 to 9 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 98. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 62.
Friday
Sunny, with a high near 95.
Friday Night
Clear, with a low around 60.
Saturday
Sunny, with a high near 90.
Saturday Night
Clear, with a low around 56.
Sunday
Sunny, with a high near 85.
Sunday Night
Clear, with a low around 54.
Monday
Sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Cave Junction OR
 42.25°N 123.67°W (Elev. 3409 ft)
11:15 pm PDT Aug 3, 2026
4am 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