Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

59°F

15°C

Humidity 23%
Wind Speed SSE 4 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 18 Apr 03:28 AM PDT
Extended Forecast for

Brentwood CA

  • Overnight

    Overnight: Partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79. Light and variable wind.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 53. West wind 3 to 5 mph.

    Low: 53 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 78. West wind 3 to 7 mph.

    High: 78 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 48. West wind 5 to 10 mph becoming light southwest  after midnight. Winds could gust as high as 18 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers, mainly after 11am.  Mostly sunny, with a high near 75. New precipitation amounts of less than a tenth of an inch possible.

    High: 75 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers, mainly after 11pm.  Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 11am.  Cloudy, with a high near 64.

    High: 64 °F

    Showers

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 11pm.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Rain Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 46. Calm wind.
Saturday
Sunny, with a high near 79. Light and variable wind.
Saturday Night
Mostly cloudy, with a low around 53. West wind 3 to 5 mph.
Sunday
Partly sunny, with a high near 78. West wind 3 to 7 mph.
Sunday Night
Partly cloudy, with a low around 48. West wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 18 mph.
Monday
A 30 percent chance of showers, mainly after 11am. Mostly sunny, with a high near 75. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Showers, mainly after 11pm. Low around 53. Chance of precipitation is 80%.
Tuesday
Showers, with thunderstorms also possible after 11am. Cloudy, with a high near 64.
Tuesday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 50.
Wednesday
A chance of rain. Mostly sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 73.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood CA
 37.93°N 121.7°W (Elev. 75 ft)
1:41 am PDT Apr 18, 2026
3am PDT Apr 18, 2026-6pm PDT Apr 24, 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