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

50°F

10°C

Humidity 72%
Wind Speed S 0 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 04 Aug 05:52 AM PDT
Extended Forecast for

8 Miles NW Cave Junction OR

Heat Advisory August 4, 11:00am until August 6, 11:00pm
Red Flag Warning August 4, 06:06am 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, 06:06am until August 4, 09:00pm

    NOW until 9:00pm Tue

    Red Flag Warning

  • Today

    High: 91 °F

    Areas Smoke

  • Tonight

    Tonight: Patchy smoke. Clear, with a low around 65. Northeast wind 3 to 8 mph.

    Low: 65 °F

    Patchy Smoke

  • Wednesday

    Wednesday: Sunny, with a high near 91. Light and variable wind becoming west northwest around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 66. West wind 5 to 9 mph becoming calm  in the evening.

    Low: 66 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 88. Calm wind becoming west around 6 mph in the afternoon.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

Detailed Forecast

Today
Areas of smoke before 2pm. Sunny, with a high near 91. East northeast wind 5 to 7 mph.
Tonight
Patchy smoke. Clear, with a low around 65. Northeast wind 3 to 8 mph.
Wednesday
Sunny, with a high near 91. Light and variable wind becoming west northwest around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 66. West wind 5 to 9 mph becoming calm in the evening.
Thursday
Sunny, with a high near 88. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 64.
Friday
Sunny, with a high near 88.
Friday Night
Clear, with a low around 64.
Saturday
Sunny, with a high near 83.
Saturday Night
Clear, with a low around 59.
Sunday
Sunny, with a high near 77.
Sunday Night
Clear, with a low around 56.
Monday
Sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles NW Cave Junction OR
 42.26°N 123.73°W (Elev. 3543 ft)
4:40 am PDT Aug 4, 2026
6am 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