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

76°F

24°C

Humidity 44%
Wind Speed S 13 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Heat Index78°F (26°C)
Last update 04 Aug 11:28 AM PDT
Extended Forecast for

4 Miles SW Discovery Bay 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: 103 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 63. West wind 5 to 8 mph becoming calm  after midnight.

    Low: 63 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101. Light and variable wind becoming west northwest 5 to 8 mph in the morning.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 63. West southwest wind 3 to 7 mph.

    Low: 63 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 100 °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 104.

    High: 104 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 65.

    Low: 65 °F

    Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 103. West wind 5 to 9 mph.
Tonight
Clear, with a low around 63. West wind 5 to 8 mph becoming calm after midnight.
Wednesday
Sunny and hot, with a high near 101. Light and variable wind becoming west northwest 5 to 8 mph in the morning.
Wednesday Night
Clear, with a low around 63. West southwest wind 3 to 7 mph.
Thursday
Sunny and hot, with a high near 100. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Thursday Night
Clear, with a low around 63.
Friday
Sunny and hot, with a high near 104.
Friday Night
Clear, with a low around 65.
Saturday
Sunny and hot, with a high near 107.
Saturday Night
Clear, with a low around 66.
Sunday
Sunny and hot, with a high near 103.
Sunday Night
Clear, with a low around 66.
Monday
Sunny and hot, with a high near 98.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Discovery Bay CA
 37.87°N 121.63°W (Elev. 16 ft)
11:26 am PDT Aug 4, 2026
12pm PDT Aug 4, 2026-6pm PDT Aug 10, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database