Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

46°F

8°C

Humidity 100%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 27 Dec 10:28 AM PST
Extended Forecast for

Brentwood CA

  • Today

    Today: Mostly sunny, with a high near 51. North northwest wind around 7 mph.

    High: 51 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Light west northwest wind.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 51. North wind 3 to 6 mph.

    High: 51 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 50. Northeast wind 3 to 5 mph.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Patchy fog after 2am. Patchy frost after 4am.  Otherwise, partly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Frost and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 10am. Patchy frost before 7am.  Otherwise, partly sunny, with a high near 51.

    High: 51 °F

    Patchy Frost
    and Patchy
    Fog then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog before 9pm, then patchy fog after 2am.  Otherwise, partly cloudy, with a low around 38.

    Low: 38 °F

    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of rain after 4pm.  Patchy fog before 10am.  Otherwise, mostly cloudy, with a high near 51.

    High: 51 °F

    Patchy Fog
    then Slight
    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 51. North northwest wind around 7 mph.
Tonight
Partly cloudy, with a low around 40. Light west northwest wind.
Sunday
Sunny, with a high near 51. North wind 3 to 6 mph.
Sunday Night
Partly cloudy, with a low around 38. Calm wind.
Monday
Mostly sunny, with a high near 50. Northeast wind 3 to 5 mph.
Monday Night
Patchy fog after 2am. Patchy frost after 4am. Otherwise, partly cloudy, with a low around 36.
Tuesday
Patchy fog before 10am. Patchy frost before 7am. Otherwise, partly sunny, with a high near 51.
Tuesday Night
Patchy fog before 9pm, then patchy fog after 2am. Otherwise, partly cloudy, with a low around 38.
Wednesday
A slight chance of rain after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 51.
Wednesday Night
A chance of rain, mainly after 10pm. Patchy fog before 10pm, then patchy fog after midnight. Otherwise, cloudy, with a low around 43.
New Year's Day
Rain likely. Cloudy, with a high near 51.
Thursday Night
Rain likely. Cloudy, with a low around 45.
Friday
A chance of rain. Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
Brentwood CA
 37.93°N 121.7°W (Elev. 75 ft)
11:05 am PST Dec 27, 2025
11am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database