Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Current conditions at

Berkeley Lab (LBNL1)

Lat: 37.8771°NLon: 122.2486°WElev: 888.0ft.

NA

50°F

10°C

Humidity 77%
Wind Speed WSW 1 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 10 Dec 10:00 AM PST
Extended Forecast for

Hercules CA

  • Today

    Today: Sunny, with a high near 48. East wind around 6 mph.

    High: 48 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 43. Calm wind becoming east around 5 mph after midnight.

    Low: 43 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 52. East northeast wind around 7 mph.

    High: 52 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. Northeast wind 3 to 5 mph.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 54. Northeast wind around 7 mph.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 2am.  Otherwise, partly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 48. East wind around 6 mph.
Tonight
Mostly clear, with a low around 43. Calm wind becoming east around 5 mph after midnight.
Thursday
Sunny, with a high near 52. East northeast wind around 7 mph.
Thursday Night
Mostly clear, with a low around 43. Northeast wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 54. Northeast wind around 7 mph.
Friday Night
Mostly clear, with a low around 42.
Saturday
Mostly sunny, with a high near 57.
Saturday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 57.
Sunday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 46.
Monday
A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 58.
Monday Night
A chance of rain. Mostly cloudy, with a low around 51.
Tuesday
A chance of rain. Mostly cloudy, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Hercules CA
 38°N 122.27°W (Elev. 377 ft)
12:26 am PST Dec 10, 2025
10am PST Dec 10, 2025-6pm PST Dec 16, 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