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

San Jose / Reid / Hillv (KRHV)

Lat: 37.33333°NLon: 121.81667°WElev: 135.0ft.

Partly Cloudy

77°F

25°C

Humidity 47%
Wind Speed NNW 12 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 08 Apr 05:47 PM PDT
Extended Forecast for

Mount Hamilton CA

  • Tonight

    Tonight: Mostly clear, with a low around 49. West wind 5 to 10 mph becoming light west southwest after midnight. Winds could gust as high as 18 mph.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers between 2pm and 4pm. Mostly sunny, with a high near 63. Light southwest wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 20%.

    High: 63 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, then showers and possibly a thunderstorm after 11am. High near 55. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 55 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. South wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 50. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 50 °F

    Showers

  • Saturday Night

    Saturday Night: Rain likely. Mostly cloudy, with a low around 41. Chance of precipitation is 70%.

    Low: 41 °F

    Rain Likely

  • Sunday

    Sunday: Rain likely. Mostly cloudy, with a high near 46.

    High: 46 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A chance of rain, mainly before 11pm. Partly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 49. West wind 5 to 10 mph becoming light west southwest after midnight. Winds could gust as high as 18 mph.
Thursday
A slight chance of showers between 2pm and 4pm. Mostly sunny, with a high near 63. Light southwest wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of showers, mainly after 11pm. Mostly cloudy, with a low around 48. Southwest wind 5 to 9 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of showers, then showers and possibly a thunderstorm after 11am. High near 55. South wind 5 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. 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. Mostly cloudy, with a low around 47. South wind 6 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 50. 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 41. Chance of precipitation is 70%.
Sunday
Rain likely. Mostly cloudy, with a high near 46.
Sunday Night
A chance of rain, mainly before 11pm. Partly cloudy, with a low around 40.
Monday
Sunny, with a high near 53.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Mostly sunny, with a high near 59.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Hamilton CA
 37.35°N 121.64°W (Elev. 2398 ft)
Last Update:
4:51 pm PDT Apr 8, 2026
Forecast Valid:
6pm 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