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

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

NA

81°F

27°C

Humidity 34%
Wind Speed S 14 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Heat Index80°F (27°C)
Last update 04 Aug 12:28 PM PDT
Extended Forecast for

Antioch CA

Heat Advisory until August 4, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until August 4, 10:00pm

    NOW until 10:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 98 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 64. West wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 64 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64. West wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 93. West wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 67.

    Low: 67 °F

    Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 98. West wind 11 to 14 mph, with gusts as high as 22 mph.
Tonight
Clear, with a low around 64. West wind 7 to 11 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 95. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Clear, with a low around 64. West wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 93. West wind 7 to 11 mph, with gusts as high as 20 mph.
Thursday Night
Clear, with a low around 65.
Friday
Sunny and hot, with a high near 100.
Friday Night
Clear, with a low around 67.
Saturday
Sunny and hot, with a high near 101.
Saturday Night
Clear, with a low around 68.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear, with a low around 68.
Monday
Sunny, with a high near 92.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Antioch CA
 38°N 121.81°W (Elev. 36 ft)
11:26 am 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