Extreme Heat in the Southwest; Severe Weather in the Northern Plains; Heavy Rain in the East

Extreme heat continues across the Southwest as temperatures may top 120 degrees. The heat may expand across the West and south-central U.S. into the middle of the month. Severe thunderstorms capable of severe wind gusts and large hail will be the primary hazards today across the northern Plains into the upper Midwest. Rainfall could be locally heavy across the Eastern U.S. today. Read More >

Hazardous Weather Conditions

Current conditions at

DIABLO GRANDE (DBLC1)

Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.

NA

94°F

34°C

Humidity 13%
Wind Speed E 5 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Heat Index89°F (32°C)
Last update 03 Aug 11:00 AM PDT
Extended Forecast for

14 Miles ENE Mount Hamilton CA

Heat Advisory August 3, 12:01pm until August 3, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 3, 12:01pm until August 3, 10:00pm

    NOW until 10:00pm Mon

    Heat Advisory

  • This Afternoon

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. Light and variable wind becoming southwest around 6 mph after midnight.

    Low: 75 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Light and variable wind becoming east southeast 5 to 7 mph in the morning.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73. Southeast wind around 5 mph becoming light and variable.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91. Light and variable wind becoming east southeast 5 to 7 mph in the afternoon.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 73.

    Low: 73 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 93. East wind 5 to 7 mph.
Tonight
Clear, with a low around 75. Light and variable wind becoming southwest around 6 mph after midnight.
Tuesday
Sunny, with a high near 92. Light and variable wind becoming east southeast 5 to 7 mph in the morning.
Tuesday Night
Clear, with a low around 73. Southeast wind around 5 mph becoming light and variable.
Wednesday
Sunny, with a high near 91. Light and variable wind becoming east southeast 5 to 7 mph in the afternoon.
Wednesday Night
Clear, with a low around 73.
Thursday
Sunny, with a high near 92.
Thursday Night
Clear, with a low around 75.
Friday
Sunny, with a high near 94.
Friday Night
Clear, with a low around 77.
Saturday
Sunny and hot, with a high near 96.
Saturday Night
Clear, with a low around 76.
Sunday
Sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
14 Miles ENE Mount Hamilton CA
 37.39°N 121.4°W (Elev. 2799 ft)
11:31 am PDT Aug 3, 2026
12pm PDT Aug 3, 2026-6pm PDT Aug 9, 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