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 this 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

79°F

26°C

Humidity 41%
Wind Speed WSW 3 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 09 Apr 01:47 PM PDT
Extended Forecast for

Mount Hamilton CA

  • This Afternoon

    This Afternoon: A 10 percent chance of showers after 5pm. Mostly sunny, with a high near 62. West southwest wind around 8 mph.

    High: 62 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 9pm, then a chance of showers after 3am. Mostly cloudy, with a low around 48. Southwest wind 5 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Chance
    Showers

  • Friday

    Friday: Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. High near 52. South southwest wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 52 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 46. South southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 2pm. High near 50. South wind 9 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 50 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 41. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 41 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 11am. High near 46. Chance of precipitation is 90%.

    High: 46 °F

    Showers

  • Sunday Night

    Sunday Night: Rain likely, mainly before 11pm. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Rain Likely

  • Monday

    Monday: A slight chance of rain. Mostly sunny, with a high near 52.

    High: 52 °F

    Slight Chance
    Rain

Detailed Forecast

This Afternoon
A 10 percent chance of showers after 5pm. Mostly sunny, with a high near 62. West southwest wind around 8 mph.
Tonight
A slight chance of showers before 9pm, then a chance of showers after 3am. Mostly cloudy, with a low around 48. Southwest wind 5 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. High near 52. South southwest wind 6 to 10 mph, with gusts as high as 21 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 and possibly a thunderstorm. Low around 46. South southwest wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers, with thunderstorms also possible after 2pm. High near 50. South wind 9 to 16 mph, with gusts as high as 30 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. Low around 41. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Showers, with thunderstorms also possible after 11am. High near 46. Chance of precipitation is 90%.
Sunday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 41.
Monday
A slight chance of rain. Mostly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 60.
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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:
1:26 pm PDT Apr 9, 2026
Forecast Valid:
2pm PDT Apr 9, 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