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

41°F

5°C

Humidity 98%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 09 Dec 09:00 AM PST
Extended Forecast for

19 Miles ENE Mount Hamilton CA

  • Today

    Today: Widespread haze before 11am. Sunny, with a high near 56. North wind 5 to 7 mph.

    High: 56 °F

    Haze then
    Sunny

  • Tonight

    Tonight: Mostly clear, with a steady temperature around 50. Calm wind becoming north northwest around 5 mph after midnight.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 57. North northeast wind 3 to 6 mph.

    High: 57 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 58. Calm wind becoming north around 6 mph in the morning.

    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 56.

    High: 56 °F

    Sunny

Detailed Forecast

Today
Widespread haze before 11am. Sunny, with a high near 56. North wind 5 to 7 mph.
Tonight
Mostly clear, with a steady temperature around 50. Calm wind becoming north northwest around 5 mph after midnight.
Wednesday
Sunny, with a high near 57. North northeast wind 3 to 6 mph.
Wednesday Night
Mostly clear, with a low around 49. Calm wind.
Thursday
Sunny, with a high near 58. Calm wind becoming north around 6 mph in the morning.
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 56.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
19 Miles ENE Mount Hamilton CA
 37.42°N 121.32°W (Elev. 2201 ft)
1:20 am PST Dec 9, 2025
10am PST Dec 9, 2025-6pm PST Dec 15, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database