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 this 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.

Overcast

59°F

15°C

Humidity 83%
Wind Speed W 6 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 09 Apr 09:54 AM PDT
Extended Forecast for

2 Miles SW Castro Valley CA

  • Today

    Today: Mostly sunny, with a high near 73. Calm wind becoming west 5 to 9 mph in the afternoon.

    High: 73 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of rain, then a chance of showers and thunderstorms after 2am.  Mostly cloudy, with a low around 56. West wind 5 to 8 mph becoming calm  in the evening.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Slight Chance
    Rain then
    Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm.  High near 69. Calm wind becoming southwest 5 to 9 mph in the afternoon.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 11pm, then rain likely after 11pm.  Mostly cloudy, with a low around 55. South southwest wind 6 to 10 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Showers
    Likely

  • Saturday

    Saturday: Rain, mainly before 2pm, then showers and possibly a thunderstorm after 2pm.  High near 63. South southwest wind 6 to 15 mph, with gusts as high as 24 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 2am, then rain after 2am.  Low around 48. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Showers

  • Sunday

    Sunday: Rain before 11am, then showers and possibly a thunderstorm after 11am.  High near 61. Chance of precipitation is 80%.

    High: 61 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of rain before 11pm.  Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 73. Calm wind becoming west 5 to 9 mph in the afternoon.
Tonight
A slight chance of rain, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 56. West wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and possibly a thunderstorm. High near 69. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 11pm, then rain likely after 11pm. Mostly cloudy, with a low around 55. South southwest wind 6 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain, mainly before 2pm, then showers and possibly a thunderstorm after 2pm. High near 63. South southwest wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 2am, then rain after 2am. Low around 48. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 61. Chance of precipitation is 80%.
Sunday Night
A chance of rain before 11pm. Mostly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Castro Valley CA
 37.69°N 122.07°W (Elev. 197 ft)
1:26 am PDT Apr 9, 2026
10am PDT Apr 9, 2026-6pm PDT Apr 15, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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