Powerful Winter Storm from the Upper Midwest into the Northeast; Severe Thunderstorms in the Midwest and Ohio Valley

A rapidly-intensifying storm is expected to bring heavy snow, blizzard conditions, and icing from the Upper Midwest through the Great Lakes and Northeast. Scattered severe thunderstorms may produce severe/damaging wind gusts and a couple of tornadoes across parts of the Midwest and lower Ohio Valley through the evening. Arctic air will expand across the central and southern U.S.. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

41°F

5°C

Humidity 74%
Wind Speed NNW 4 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 28 Dec 09:00 PM PST
Extended Forecast for

14 Miles NE Mount Hamilton CA

Frost Advisory December 29, 01:00am until December 29, 09:00am
Click here for hazard details and duration
Frost Advisory
  • Tonight

    Tonight: Widespread frost.  Otherwise, mostly clear, with a low around 29. Light and variable wind.

    Low: 29 °F

    Frost

  • Monday

    Monday: Widespread frost before 9am.  Otherwise, sunny, with a high near 55. Light and variable wind becoming east northeast around 6 mph.

    High: 55 °F

    Frost then
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. Light and variable wind.

    Low: 33 °F

    Mostly Clear

  • Tuesday

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

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. Light east southeast wind.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of rain after 10am.  Partly sunny, with a high near 53.

    High: 53 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely.  Mostly cloudy, with a low around 40. Chance of precipitation is 60%.

    Low: 40 °F

    Rain Likely

  • New Year's Day

    New Year's Day: Rain likely.  Mostly cloudy, with a high near 53.

    High: 53 °F

    Rain Likely

  • Thursday Night

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

    Low: 42 °F

    Rain Likely

Detailed Forecast

Tonight
Widespread frost. Otherwise, mostly clear, with a low around 29. Light and variable wind.
Monday
Widespread frost before 9am. Otherwise, sunny, with a high near 55. Light and variable wind becoming east northeast around 6 mph.
Monday Night
Mostly clear, with a low around 33. Light and variable wind.
Tuesday
Mostly sunny, with a high near 57. South southeast wind around 6 mph becoming east northeast in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 37. Light east southeast wind.
Wednesday
A 30 percent chance of rain after 10am. Partly sunny, with a high near 53.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
New Year's Day
Rain likely. Mostly cloudy, with a high near 53.
Thursday Night
Rain likely. Mostly cloudy, with a low around 42.
Friday
Rain likely. Mostly cloudy, with a high near 55.
Friday Night
Rain likely. Mostly cloudy, with a low around 41.
Saturday
Rain likely. Mostly cloudy, with a high near 52.
Saturday Night
Rain likely. Mostly cloudy, with a low around 40.
Sunday
A chance of rain. Partly sunny, with a high near 53.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles NE Mount Hamilton CA
 37.49°N 121.48°W (Elev. 2799 ft)
1:21 pm PST Dec 28, 2025
9pm PST Dec 28, 2025-6pm PST Jan 4, 2026
 
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