Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

37°F

3°C

Humidity 100%
Wind Speed NNE 8 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill31°F (-1°C)
Last update 08 Dec 12:28 AM PST
Extended Forecast for

5 Miles SW Brentwood CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 54. Calm wind becoming northeast around 5 mph.

    High: 54 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 56. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 56 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 43. Calm wind.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 54. Calm wind becoming northeast around 5 mph.
Monday Night
Partly cloudy, with a low around 42. Calm wind.
Tuesday
Mostly sunny, with a high near 56. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 45. Calm wind.
Wednesday
Mostly sunny, with a high near 60.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Mostly clear, with a low around 44.
Friday
Mostly sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
Partly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Brentwood CA
 37.87°N 121.77°W (Elev. 758 ft)
12:26 am PST Dec 8, 2025
12am PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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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