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

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

55°F

13°C

Humidity 66%
Wind Speed SW 8 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 09 Apr 04:25 AM PDT
Extended Forecast for

3 Miles ESE Danville CA

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 72 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A slight chance of rain before 11pm, then a chance of showers and thunderstorms after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 50. West wind 5 to 7 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: 50 °F

    Slight Chance
    Rain then
    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Showers and possibly a thunderstorm. Patchy fog before 8am. High near 67. Calm wind becoming southwest 5 to 8 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: 67 °F

    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 11pm, then rain likely after 11pm. Low around 49. South southwest wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Showers

  • Saturday

    Saturday: Rain likely, then showers and possibly a thunderstorm after 11am. High near 61. South southwest wind 5 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 61 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm, mainly before 2am, then rain likely after 2am. Low around 43. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Showers

  • Sunday

    Sunday: Rain before 11am, then showers and possibly a thunderstorm after 11am. High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of rain before 11pm. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Tonight
A slight chance of rain before 11pm, then a chance of showers and thunderstorms after 2am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 50. West wind 5 to 7 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. Patchy fog before 8am. High near 67. Calm wind becoming southwest 5 to 8 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 and possibly a thunderstorm before 11pm, then rain likely after 11pm. Low around 49. South southwest wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain likely, then showers and possibly a thunderstorm after 11am. High near 61. South southwest wind 5 to 14 mph, with gusts as high as 28 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, mainly before 2am, then rain likely after 2am. Low around 43. 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 58. Chance of precipitation is 80%.
Sunday Night
A chance of rain before 11pm. Mostly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Mostly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Danville CA
 37.8°N 121.96°W (Elev. 604 ft)
Last Update:
1:26 am PDT Apr 9, 2026
Forecast Valid:
5am 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