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

Heavy Rain and Flooding Concerns in Hawaii; Severe Weather in the Plains

A storm system is expected to bring strong winds, widespread heavy rainfall, and flooding concerns to the Hawaiian Islands through the weekend. Strong to severe thunderstorms are forecast from the Southern Plains to the Mid-Missouri Valley Thursday afternoon and evening. Large hail and strong winds are the primary threats. Read More >

Current conditions at

Hayward, Hayward Air Terminal (KHWD)

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

Mostly Cloudy

57°F

14°C

Humidity 89%
Wind Speed NW 5 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 08 Apr 10:06 PM PDT
Extended Forecast for

2 Miles NNW Castro Valley CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. West southwest wind 3 to 6 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers between 1pm and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 71. Light south southwest wind becoming west 5 to 10 mph in the afternoon. Chance of precipitation is 20%.

    High: 71 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 54. West wind 5 to 9 mph becoming light south southwest after midnight. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 67. Light south southwest wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 53. South southwest wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 62. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Showers

  • Saturday Night

    Saturday Night: Rain likely. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Rain Likely

  • Sunday

    Sunday: A chance of rain. Partly sunny, with a high near 60.

    High: 60 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain, mainly before 11pm. Partly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. West southwest wind 3 to 6 mph.
Thursday
A slight chance of showers between 1pm and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 71. Light south southwest wind becoming west 5 to 10 mph in the afternoon. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 54. West wind 5 to 9 mph becoming light south southwest after midnight. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 67. Light south southwest wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 53. South southwest wind 6 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 62. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Rain likely. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.
Sunday
A chance of rain. Partly sunny, with a high near 60.
Sunday Night
A chance of rain, mainly before 11pm. Partly cloudy, with a low around 44.
Monday
Sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 47.
Wednesday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Castro Valley CA
 37.73°N 122.08°W (Elev. 614 ft)
Last Update:
4:51 pm PDT Apr 8, 2026
Forecast Valid:
10pm PDT Apr 8, 2026-6pm PDT Apr 15, 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