Critical Fire Weather in the Southern High Plains; Heavy Snow in the Great Lakes and Northeast U.S.

Gusty winds and low relative humidity will bring elevated to critical fire weather conditions to the southern High Plains through the weekend. A winter storm will track across the Great Lakes and Northeast U.S. into Saturday with areas of wintry mix and heavy snow from northern New York through southern Maine. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Clear

37°F

3°C

Humidity 86%
Wind Speed NE 5 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 20 Feb 06:00 AM PST
Extended Forecast for

Castro Valley CA

Cold Weather Advisory until February 20, 09:00am
Click here for hazard details and duration
...
  •  
    Cold Weather Advisory until February 20, 09:00am

    NOW until 9:00am Fri

    Cold Weather Advisory

  • Today

    High: 52 °F

    Areas Frost
    then Partly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 38. East southeast wind 3 to 6 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 58. East wind 7 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.

    High: 58 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: A 30 percent chance of rain, mainly after 4am.  Partly cloudy, with a low around 46. South southeast wind 11 to 13 mph, with gusts as high as 24 mph.

    Low: 46 °F

    Chance Rain

  • Sunday

    Sunday: A 30 percent chance of rain, mainly before 10am.  Partly sunny, with a high near 66. South wind 11 to 13 mph, with gusts as high as 24 mph.

    High: 66 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 20 percent chance of rain before 4am.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Slight Chance
    Rain

  • Monday

    Monday: A 30 percent chance of rain, mainly after 4pm.  Mostly cloudy, with a high near 67.

    High: 67 °F

    Chance Rain

  • Monday Night

    Monday Night: Rain, mainly after 10pm.  Cloudy, with a low around 54.

    Low: 54 °F

    Rain

Detailed Forecast

Today
Areas of frost before 8am. Otherwise, partly sunny, with a high near 52. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 38. East southeast wind 3 to 6 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 58. East wind 7 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
A 30 percent chance of rain, mainly after 4am. Partly cloudy, with a low around 46. South southeast wind 11 to 13 mph, with gusts as high as 24 mph.
Sunday
A 30 percent chance of rain, mainly before 10am. Partly sunny, with a high near 66. South wind 11 to 13 mph, with gusts as high as 24 mph.
Sunday Night
A 20 percent chance of rain before 4am. Mostly cloudy, with a low around 50.
Monday
A 30 percent chance of rain, mainly after 4pm. Mostly cloudy, with a high near 67.
Monday Night
Rain, mainly after 10pm. Cloudy, with a low around 54.
Tuesday
Rain. Cloudy, with a high near 62.
Tuesday Night
Rain. Cloudy, with a low around 52.
Wednesday
Rain likely. Mostly cloudy, with a high near 64.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 51.
Thursday
A chance of rain. Mostly cloudy, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Castro Valley CA
 37.72°N 122.05°W (Elev. 397 ft)
12:32 am PST Feb 20, 2026
6am PST Feb 20, 2026-6pm PST Feb 26, 2026
 
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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