Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

51°F

11°C

Humidity 46%
Wind Speed NNW 4 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 20 Jan 07:28 PM PST
Extended Forecast for

Brentwood CA

  • Tonight

    Tonight: Areas of dense fog before 4am, then widespread dense fog after 5am.  Otherwise, cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Dense Fog

  • Wednesday

    Wednesday: Widespread dense fog, mainly before 8am.  Otherwise, cloudy, with a high near 57. Calm wind.

    High: 57 °F

    Dense Fog
    then Cloudy

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 62. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 62 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 44. Light southwest wind.

    Low: 44 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Tonight
Areas of dense fog before 4am, then widespread dense fog after 5am. Otherwise, cloudy, with a low around 44. Calm wind.
Wednesday
Widespread dense fog, mainly before 8am. Otherwise, cloudy, with a high near 57. Calm wind.
Wednesday Night
Cloudy, with a low around 47. Calm wind.
Thursday
Mostly cloudy, with a high near 62. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 44. Light southwest wind.
Friday
Partly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 58.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Mostly cloudy, with a high near 57.
Sunday Night
Mostly cloudy, with a low around 40.
Monday
Mostly cloudy, with a high near 58.
Monday Night
Mostly cloudy, with a low around 39.
Tuesday
Mostly cloudy, with a high near 58.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood CA
 37.93°N 121.7°W (Elev. 75 ft)
7:24 pm PST Jan 20, 2026
7pm PST Jan 20, 2026-6pm PST Jan 27, 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