Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

72°F

22°C

Humidity 38%
Wind Speed NNW 4 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 20 Mar 06:28 AM PDT
Extended Forecast for

5 Miles N Discovery Bay CA

Heat Advisory March 20, 07:07am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 20, 07:07am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. Light and variable wind.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 88. West northwest wind 3 to 8 mph.

    High: 88 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54. West southwest wind 6 to 9 mph.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 87. Northwest wind 6 to 8 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 91. Light northwest wind.
Tonight
Mostly clear, with a low around 57. Light and variable wind.
Saturday
Mostly sunny, with a high near 88. West northwest wind 3 to 8 mph.
Saturday Night
Mostly clear, with a low around 54. West southwest wind 6 to 9 mph.
Sunday
Sunny, with a high near 87. Northwest wind 6 to 8 mph.
Sunday Night
Partly cloudy, with a low around 50.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 82.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles N Discovery Bay CA
 37.97°N 121.57°W (Elev. 3 ft)
2:22 am PDT Mar 20, 2026
7am PDT Mar 20, 2026-6pm PDT Mar 26, 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