Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

40°F

4°C

Humidity 99%
Wind Speed ENE 5 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill36°F (2°C)
Last update 08 Dec 10:00 AM PST
Extended Forecast for

19 Miles ENE Mount Hamilton CA

  • Today

    Today: Sunny, with a high near 53. North northeast wind around 6 mph.

    High: 53 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 46. Light north northwest wind.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 56. North wind 5 to 7 mph.

    High: 56 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Light northwest wind.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 58. North wind 3 to 7 mph.

    High: 58 °F

    Sunny

  • Wednesday Night

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

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 53. North northeast wind around 6 mph.
Tonight
Mostly clear, with a low around 46. Light north northwest wind.
Tuesday
Sunny, with a high near 56. North wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 47. Light northwest wind.
Wednesday
Sunny, with a high near 58. North wind 3 to 7 mph.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 58.
Friday Night
Mostly clear, with a low around 48.
Saturday
Sunny, with a high near 58.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 56.
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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 8, 2025
10am PST Dec 8, 2025-6pm PST Dec 14, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database