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

Tracking Atmospheric River for California; Record Temperatures Further East

An atmospheric river will bring gusty to high winds, moderate to heavy rainfall, and potential flooding to California today through Saturday. Heavy snow will be possible over the Sierra Nevada mountains into Friday associated with this atmospheric river. East of these impacts dozens of record high maximum and high minimum temperatures may be broken or tied today and Friday. Read More >

Hazardous Weather Conditions

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

light rain,mist

61°F

16°C

Humidity 87%
Wind Speed W 4 MPH
Barometer 29.82 in (1009.82 mb)
Dewpoint 57°F (14°C)
Visibility 6.00 mi
Last update 13 Nov 01:35 PM PST
Extended Forecast for

Union City CA

Flood Advisory November 13, 01:59pm until November 13, 03:00pm
Click here for hazard details and duration
Flood Advisory
  •  
    Flood Advisory November 13, 01:59pm until November 13, 03:00pm

    NOW until 3:00pm Thu

    Flood Advisory

  • This Afternoon

    High: 65 °F

    Showers

  • Tonight

    Tonight: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 53. Light and variable wind becoming south 9 to 14 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Rain Likely

  • Friday

    Friday: A 30 percent chance of rain before 4pm. Mostly sunny, with a high near 65. Light and variable wind becoming north northeast around 6 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.

    High: 65 °F

    Chance Rain

  • Friday Night

    Friday Night: A 20 percent chance of rain after 10pm. Partly cloudy, with a low around 51. Light northeast wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A 30 percent chance of rain, mainly after 10am. Partly sunny, with a high near 63. Calm wind becoming west southwest around 5 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 54. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Chance Rain

  • Sunday

    Sunday: A 40 percent chance of rain. Mostly cloudy, with a high near 62.

    High: 62 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance Rain

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 4pm, then rain likely and possibly a thunderstorm after 4pm. High near 65. South wind 17 to 20 mph, with gusts as high as 43 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 53. Light and variable wind becoming south 9 to 14 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 30 percent chance of rain before 4pm. Mostly sunny, with a high near 65. Light and variable wind becoming north northeast around 6 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 20 percent chance of rain after 10pm. Partly cloudy, with a low around 51. Light northeast wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 30 percent chance of rain, mainly after 10am. Partly sunny, with a high near 63. Calm wind becoming west southwest around 5 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 54. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 62.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 52.
Monday
A chance of rain, mainly before 4pm. Partly sunny, with a high near 59.
Monday Night
A slight chance of rain before 10pm. Mostly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Union City CA
 37.61°N 122.02°W (Elev. 184 ft)
Last Update:
12:26 pm PST Nov 13, 2025
Forecast Valid:
1pm PST Nov 13, 2025-6pm PST Nov 19, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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