Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

45°F

7°C

Humidity 97%
Wind Speed E 3 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 09 Dec 11:00 AM PST
Extended Forecast for

18 Miles ENE Mount Hamilton CA

  • Today

    Today: Sunny, with a steady temperature around 55. North northwest wind around 6 mph.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 52. Northwest wind 3 to 5 mph.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 59. North wind around 6 mph.

    High: 59 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49. Light west northwest wind.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 58. North wind 3 to 6 mph.

    High: 58 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

Detailed Forecast

Today
Sunny, with a steady temperature around 55. North northwest wind around 6 mph.
Tonight
Mostly clear, with a steady temperature around 52. Northwest wind 3 to 5 mph.
Wednesday
Sunny, with a high near 59. North wind around 6 mph.
Wednesday Night
Mostly clear, with a low around 49. Light west northwest wind.
Thursday
Sunny, with a high near 58. North wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 58.
Friday Night
Mostly clear, with a low around 47.
Saturday
Sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 56.
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ABOUT THIS FORECAST

 
Point Forecast:
18 Miles ENE Mount Hamilton CA
 37.46°N 121.36°W (Elev. 2451 ft)
1:20 am PST Dec 9, 2025
11am PST Dec 9, 2025-6pm PST Dec 15, 2025
 
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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