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

Hayward, Hayward Air Terminal (KHWD)

Lat: 37.66083°NLon: 122.11833°WElev: 46.0ft.

Clear

54°F

12°C

Humidity 74%
Wind Speed WSW 4 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Last update 11 Dec 02:54 PM PST
Extended Forecast for

Union City CA

  • Tonight

    Tonight: Clear, with a low around 44. Northeast wind 3 to 6 mph.

    Low: 44 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 63. East northeast wind around 6 mph becoming light and variable  in the afternoon.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. East wind 3 to 6 mph.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64. Light and variable wind.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of rain after 4am.  Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Tonight
Clear, with a low around 44. Northeast wind 3 to 6 mph.
Friday
Sunny, with a high near 63. East northeast wind around 6 mph becoming light and variable in the afternoon.
Friday Night
Mostly clear, with a low around 44. East wind 3 to 6 mph.
Saturday
Sunny, with a high near 64. Light and variable wind.
Saturday Night
Mostly clear, with a low around 44. Calm wind.
Sunday
Sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 64.
Monday Night
A slight chance of rain after 4am. Mostly cloudy, with a low around 51.
Tuesday
A chance of rain, mainly after 10am. Mostly cloudy, with a high near 65.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 54.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 61.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 50.
Thursday
A chance of rain. Mostly cloudy, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
Union City CA
 37.61°N 122.02°W (Elev. 184 ft)
12:26 pm PST Dec 11, 2025
3pm PST Dec 11, 2025-6pm PST Dec 18, 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