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

Hayward, Hayward Air Terminal (KHWD)

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

Mist

43°F

6°C

Humidity 93%
Wind Speed NNE 3 MPH
Barometer 30.33 in (1027.09 mb)
Dewpoint 41°F (5°C)
Visibility 4.00 mi
Last update 08 Dec 06:20 AM PST
Extended Forecast for

Union City CA

  • Today

    Today: Patchy fog before 10am.  Otherwise, sunny, with a high near 58. Light and variable wind.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Tonight

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

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog between 8am and 9am.  Otherwise, sunny, with a high near 61. Light north northwest wind.

    High: 61 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy fog before 8am.  Otherwise, sunny, with a high near 67. Calm wind becoming north around 5 mph in the afternoon.

    High: 67 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, sunny, with a high near 58. Light and variable wind.
Tonight
Mostly clear, with a low around 44. Calm wind.
Tuesday
Patchy fog between 8am and 9am. Otherwise, sunny, with a high near 61. Light north northwest wind.
Tuesday Night
Mostly clear, with a low around 45. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 67. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 66.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Patchy fog. Otherwise, partly sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
Union City CA
 37.61°N 122.02°W (Elev. 184 ft)
6:22 am PST Dec 8, 2025
6am PST Dec 8, 2025-6pm PST Dec 14, 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