Very Cold Temperatures from the Northern Plains to Ohio Valley; Swath of Snow from the Midwest to Central Appalachians

Arctic air will bring very cold temperatures and dangerous wind chills from the Northern Plains to the Ohio Valley today, expanding into the Mid-South and Mid-Atlantic on Sunday. A swath of accumulating snow is expected today from the Midwest to Central Appalachians, expanding into portions of the Mid-Atlantic tonight into Sunday. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

51°F

11°C

Humidity 50%
Wind Speed WNW 2 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 14 Dec 09:28 AM PST
Extended Forecast for

3 Miles SSE Pittsburg CA

Dense Fog Advisory December 14, 09:51am until December 14, 11:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory December 14, 09:51am until December 14, 11:00am

    NOW until 11:00am Sun

    Dense Fog Advisory

  • Today

    High: 43 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Light and variable wind.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Patchy fog between 10am and 11am.  Otherwise, mostly cloudy, with a high near 55. Calm wind becoming north northwest around 5 mph.

    High: 55 °F

    Patchy Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 48. West southwest wind around 7 mph.

    Low: 48 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain after 4pm.  Mostly cloudy, with a high near 59. West wind around 7 mph.

    High: 59 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly between 10pm and 4am.  Cloudy, with a low around 56. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Rain Likely

  • Wednesday

    Wednesday: A 50 percent chance of rain, mainly before 10am.  Partly sunny, with a high near 60.

    High: 60 °F

    Chance Rain
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 4am.  Mostly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Today
Areas of dense fog before 11am. Otherwise, partly sunny, with a high near 43. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 40. Light and variable wind.
Monday
Patchy fog between 10am and 11am. Otherwise, mostly cloudy, with a high near 55. Calm wind becoming north northwest around 5 mph.
Monday Night
Mostly cloudy, with a low around 48. West southwest wind around 7 mph.
Tuesday
A 30 percent chance of rain after 4pm. Mostly cloudy, with a high near 59. West wind around 7 mph.
Tuesday Night
Rain likely, mainly between 10pm and 4am. Cloudy, with a low around 56. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 50 percent chance of rain, mainly before 10am. Partly sunny, with a high near 60.
Wednesday Night
A slight chance of rain after 4am. Mostly cloudy, with a low around 46.
Thursday
A chance of rain, mainly after 10am. Mostly cloudy, with a high near 57.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 50.
Friday
Rain likely. Cloudy, with a high near 56.
Friday Night
Rain likely. Cloudy, with a low around 51.
Saturday
A chance of rain. Cloudy, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Pittsburg CA
 37.97°N 121.86°W (Elev. 692 ft)
8:36 am PST Dec 14, 2025
9am PST Dec 14, 2025-6pm PST Dec 20, 2025
 
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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