National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

53°F

12°C

Humidity 61%
Wind Speed N 3 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 08 Dec 11:28 AM PST
Extended Forecast for

Antioch CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 51. Light east wind.

    High: 51 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy dense fog. Otherwise, mostly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Dense
    Fog

  • Tuesday

    Tuesday: Areas of fog before 10am. Otherwise, partly sunny, with a high near 51. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 51 °F

    Areas Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog before 9pm, then patchy fog after 1am. Otherwise, partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Patchy Fog

  • Wednesday

    Wednesday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 60. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 60 °F

    Areas Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear
    then Patchy
    Fog

  • Thursday

    Thursday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 59.

    High: 59 °F

    Areas Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 58.

    High: 58 °F

    Patchy Fog
    then Mostly
    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 51. Light east wind.
Tonight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 42. Calm wind.
Tuesday
Areas of fog before 10am. Otherwise, partly sunny, with a high near 51. Calm wind becoming north northeast around 5 mph in the afternoon.
Tuesday Night
Patchy fog before 9pm, then patchy fog after 1am. Otherwise, partly cloudy, with a low around 44. Calm wind.
Wednesday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 60. Calm wind becoming north northeast around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 45.
Thursday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 59.
Thursday Night
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 44.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 58.
Friday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 43.
Saturday
Areas of fog. Otherwise, mostly sunny, with a high near 59.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Sunday
Patchy fog. Otherwise, partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Antioch CA
 38°N 121.81°W (Elev. 36 ft)
Last Update:
6:22 am PST Dec 8, 2025
Forecast Valid:
12pm PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

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