Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

San Jose / Reid / Hillv (KRHV)

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

Mostly Cloudy

63°F

17°C

Humidity 59%
Wind Speed SSW 17 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 11 Apr 01:47 PM PDT
Extended Forecast for

Mount Hamilton CA

  • This Afternoon

    This Afternoon: A 30 percent chance of showers, mainly after 4pm.  Mostly cloudy, with a high near 49. South southwest wind around 17 mph, with gusts as high as 30 mph.  New precipitation amounts between a tenth and quarter of an inch possible.

    High: 49 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 2am, then showers likely after 2am. Some of the storms could produce heavy rainfall.  Low around 41. Southwest wind 14 to 18 mph, with gusts as high as 33 mph.  Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 41 °F

    Heavy Rain
    then Showers
    Likely

  • Sunday

    Sunday: Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm.  High near 46. Southwest wind 11 to 15 mph, with gusts as high as 28 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 46 °F

    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 11pm.  Mostly cloudy, with a low around 41. West southwest wind 6 to 11 mph becoming light southwest  after midnight. Winds could gust as high as 20 mph.  New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 52. West wind 3 to 8 mph.

    High: 52 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers, mainly after 4pm. Mostly cloudy, with a high near 49. South southwest wind around 17 mph, with gusts as high as 30 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 2am, then showers likely after 2am. Some of the storms could produce heavy rainfall. Low around 41. Southwest wind 14 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Sunday
Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 46. Southwest wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 30 percent chance of showers before 11pm. Mostly cloudy, with a low around 41. West southwest wind 6 to 11 mph becoming light southwest after midnight. Winds could gust as high as 20 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly sunny, with a high near 52. West wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 58.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Sunny, with a high near 59.
Thursday Night
Clear, with a low around 43.
Friday
Sunny, with a high near 64.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Hamilton CA
 37.35°N 121.64°W (Elev. 2398 ft)
1:26 pm PDT Apr 11, 2026
2pm PDT Apr 11, 2026-6pm PDT Apr 17, 2026
 
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Additional Resources

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