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

BLACK DIAMOND (PIBC1)

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

NA

46°F

8°C

Humidity 50%
Wind Speed NNW 5 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill44°F (7°C)
Last update 29 Dec 08:28 AM PST
Extended Forecast for

Pittsburg CA

  • Today

    Today: Sunny, with a high near 53. East northeast wind 5 to 9 mph.

    High: 53 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 38. Calm wind becoming east around 6 mph after midnight.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. Light east northeast wind increasing to 5 to 9 mph in the morning.

    High: 47 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46. East wind 5 to 7 mph.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 4pm. Cloudy, with a high near 48. East wind around 7 mph becoming north in the morning. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: Rain. Low around 48. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Rain

  • New Year's Day

    New Year's Day: Rain. High near 53. Chance of precipitation is 80%.

    High: 53 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely. Cloudy, with a low around 50.

    Low: 50 °F

    Rain Likely

  • Friday

    Friday: Rain likely. Cloudy, with a high near 54.

    High: 54 °F

    Rain Likely

Detailed Forecast

Today
Sunny, with a high near 53. East northeast wind 5 to 9 mph.
Tonight
Partly cloudy, with a low around 38. Calm wind becoming east around 6 mph after midnight.
Tuesday
Mostly cloudy, with a high near 47. Light east northeast wind increasing to 5 to 9 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 46. East wind 5 to 7 mph.
Wednesday
Rain likely, mainly after 4pm. Cloudy, with a high near 48. East wind around 7 mph becoming north in the morning. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 48. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
New Year's Day
Rain. High near 53. Chance of precipitation is 80%.
Thursday Night
Rain likely. Cloudy, with a low around 50.
Friday
Rain likely. Cloudy, with a high near 54.
Friday Night
Rain likely. Cloudy, with a low around 50.
Saturday
Rain likely. Mostly cloudy, with a high near 53.
Saturday Night
Rain likely. Mostly cloudy, with a low around 50.
Sunday
A chance of rain. Mostly cloudy, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pittsburg CA
 38.04°N 121.87°W (Elev. 3 ft)
Last Update:
6:44 am PST Dec 29, 2025
Forecast Valid:
8am 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