Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

53°F

12°C

Humidity 59%
Wind Speed N 5 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 11 Dec 10:28 AM PST
Extended Forecast for

Antioch CA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 48. East southeast wind around 6 mph becoming calm  in the afternoon.

    High: 48 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Calm wind becoming southeast around 5 mph after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 50. East wind 3 to 6 mph.

    High: 50 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. Light southeast wind.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 53. Light northeast wind.

    High: 53 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am.  Otherwise, mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 57.

    High: 57 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 48. East southeast wind around 6 mph becoming calm in the afternoon.
Tonight
Mostly cloudy, with a low around 40. Calm wind becoming southeast around 5 mph after midnight.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 50. East wind 3 to 6 mph.
Friday Night
Partly cloudy, with a low around 41. Light southeast wind.
Saturday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 53. Light northeast wind.
Saturday Night
Patchy fog after 4am. Otherwise, mostly clear, with a low around 42.
Sunday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 57.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Mostly cloudy, with a high near 58.
Monday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 50.
Tuesday
A chance of rain. Mostly cloudy, with a high near 61.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 54.
Wednesday
A chance of rain. Mostly cloudy, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
Antioch CA
 38°N 121.81°W (Elev. 36 ft)
10:56 am PST Dec 11, 2025
11am PST Dec 11, 2025-6pm PST Dec 17, 2025
 
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Additional Resources

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Hourly Weather Forecast

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