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

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

NA

51°F

11°C

Humidity 54%
Wind Speed WNW 2 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 28 Dec 12:28 PM PST
Extended Forecast for

Pittsburg CA

Cold Weather Advisory December 29, 01:00am until December 29, 09:00am
Click here for hazard details and duration
Cold Weather Advisory
  • This Afternoon

    This Afternoon: Sunny, with a high near 51. North northeast wind around 7 mph.

    High: 51 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Light and variable wind becoming east southeast 5 to 7 mph after midnight.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 49. East northeast wind 7 to 9 mph.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38. East northeast wind around 5 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 49. East northeast wind 7 to 9 mph.

    High: 49 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 10 percent chance of rain after 4pm.  Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain, mainly after 10pm.  Patchy fog between 10pm and 1am.  Otherwise, cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain
    and Patchy
    Fog

  • New Year's Day

    New Year's Day: Rain likely, mainly after 10am.  Cloudy, with a high near 50.

    High: 50 °F

    Rain Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 51. North northeast wind around 7 mph.
Tonight
Partly cloudy, with a low around 40. Light and variable wind becoming east southeast 5 to 7 mph after midnight.
Monday
Mostly sunny, with a high near 49. East northeast wind 7 to 9 mph.
Monday Night
Partly cloudy, with a low around 38. East northeast wind around 5 mph.
Tuesday
Partly sunny, with a high near 49. East northeast wind 7 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
A 10 percent chance of rain after 4pm. Mostly cloudy, with a high near 48.
Wednesday Night
A chance of rain, mainly after 10pm. Patchy fog between 10pm and 1am. Otherwise, cloudy, with a low around 45.
New Year's Day
Rain likely, mainly after 10am. Cloudy, with a high near 50.
Thursday Night
Rain likely. Cloudy, with a low around 49.
Friday
Rain likely. Mostly cloudy, with a high near 54.
Friday Night
A chance of rain. Mostly cloudy, with a low around 50.
Saturday
A chance of rain. Mostly cloudy, with a high near 53.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Pittsburg CA
 38.04°N 121.87°W (Elev. 3 ft)
12:27 pm PST Dec 28, 2025
1pm PST Dec 28, 2025-6pm PST Jan 3, 2026
 
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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