Coastal and Marine Impacts from Imelda and Humberto as Both Track Away from the Southeast U.S.

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine and rip current conditions to the east coast of Florida and Georgia today, spreading north along much of the east coast of the U.S. this week. Heavy rainfall north and west of Imelda falling across coastal Florida and Georgia into the Carolinas could cause isolated flash and urban flooding through Tuesday. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.

NA

69°F

21°C

Humidity 53%
Wind Speed WSW 5 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 29 Sep 05:00 PM PDT
Extended Forecast for

20 Miles E Mount Hamilton CA

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 59. West southwest wind around 6 mph becoming calm  in the evening.

    Low: 59 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 73. Light west southwest wind becoming south southwest 5 to 10 mph in the morning.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. West southwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers after 11am.  Mostly sunny, with a high near 74. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 74 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 11pm.  Mostly cloudy, with a low around 62. West northwest wind around 6 mph becoming calm  in the evening.

    Low: 62 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

Detailed Forecast

Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 59. West southwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 73. Light west southwest wind becoming south southwest 5 to 10 mph in the morning.
Tuesday Night
Mostly clear, with a low around 59. West southwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
A 20 percent chance of showers after 11am. Mostly sunny, with a high near 74. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 62. West northwest wind around 6 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 76.
Friday Night
Clear, with a low around 60.
Saturday
Sunny, with a high near 80.
Saturday Night
Clear, with a low around 61.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 58.
Monday
Sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
20 Miles E Mount Hamilton CA
 37.38°N 121.28°W (Elev. 1401 ft)
4:22 pm PDT Sep 29, 2025
5pm PDT Sep 29, 2025-6pm PDT Oct 6, 2025
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database