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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Partly Cloudy

54°F

12°C

Humidity 71%
Wind Speed S 12 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 26 Dec 08:20 AM PST
Extended Forecast for

2 Miles WSW Union City CA

Flood Watch December 26, 08:40am until December 26, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch December 26, 08:40am until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Today

    High: 57 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers between 8pm and 9pm. Mostly cloudy, with a low around 45. West wind 5 to 7 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 54. North northwest wind 3 to 6 mph.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 37. Light north northeast wind.

    Low: 37 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 53. Calm wind becoming north northeast around 6 mph in the morning.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Today
A 40 percent chance of showers between 11am and 5pm. Partly sunny, with a high near 57. South wind around 14 mph, with gusts as high as 23 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
A 20 percent chance of showers between 8pm and 9pm. Mostly cloudy, with a low around 45. West wind 5 to 7 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Mostly sunny, with a high near 54. North northwest wind 3 to 6 mph.
Saturday Night
Increasing clouds, with a low around 37. Light north northeast wind.
Sunday
Sunny, with a high near 53. Calm wind becoming north northeast around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
Mostly sunny, with a high near 56.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 42.
New Year's Day
A chance of showers. Mostly cloudy, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Union City CA
 37.58°N 122.04°W (Elev. 121 ft)
Last Update:
3:07 am PST Dec 26, 2025
Forecast Valid:
8am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation