National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Winter Storm Bringing Widespread Hazardous Weather to the Eastern U.S.

A rapidly-intensifying winter storm continues to bring heavy snow, high winds, and blizzard conditions over the Upper Midwest and Great Lakes through today. An Arctic front will lead in a period of gusty to high winds and sharply colder temperatures over the entire eastern U.S. Heavy lake effect snow is then expected from Lakes Erie and Ontario through New Year's Day. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

53°F

12°C

Humidity 67%
Wind Speed ENE 4 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 29 Dec 12:00 PM PST
Extended Forecast for

14 Miles NE Mount Hamilton CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 57. North northwest wind 3 to 6 mph.

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 34. Light and variable wind.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. South wind around 6 mph becoming east in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40. East wind 3 to 5 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 53. Southeast wind around 7 mph. Chance of precipitation is 60%.

    High: 53 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain. Low around 40. Chance of precipitation is 80%.

    Low: 40 °F

    Rain

  • New Year's Day

    New Year's Day: Rain. High near 54. Chance of precipitation is 80%.

    High: 54 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Rain Likely

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 54.

    High: 54 °F

    Rain Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 57. North northwest wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 34. Light and variable wind.
Tuesday
Mostly sunny, with a high near 57. South wind around 6 mph becoming east in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 40. East wind 3 to 5 mph.
Wednesday
Rain likely, mainly after 4pm. Mostly cloudy, with a high near 53. Southeast wind around 7 mph. Chance of precipitation is 60%.
Wednesday Night
Rain. Low around 40. Chance of precipitation is 80%.
New Year's Day
Rain. High near 54. Chance of precipitation is 80%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 42.
Friday
Rain likely. Mostly cloudy, with a high near 54.
Friday Night
Rain likely. Mostly cloudy, with a low around 42.
Saturday
Rain likely. Mostly cloudy, with a high near 52.
Saturday Night
Rain likely. Mostly cloudy, with a low around 39.
Sunday
A chance of rain. Partly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles NE Mount Hamilton CA
 37.49°N 121.48°W (Elev. 2799 ft)
Last Update:
8:51 am PST Dec 29, 2025
Forecast Valid:
1pm PST Dec 29, 2025-6pm PST Jan 4, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation