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

45°F

7°C

Humidity 67%
Wind Speed NW 1 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 28 Dec 04:28 PM PST
Extended Forecast for

4 Miles SW Discovery Bay CA

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

    Tonight: Patchy fog before 2am, then patchy fog after 3am.  Otherwise, partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Patchy Fog

  • Monday

    Monday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 50. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 50 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Patchy fog after midnight.  Otherwise, partly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 10am.  Otherwise, partly sunny, with a high near 50. Calm wind becoming east northeast around 5 mph in the morning.

    High: 50 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog.  Otherwise, mostly cloudy, with a low around 39. Calm wind.

    Low: 39 °F

    Patchy Fog

  • Wednesday

    Wednesday: A 10 percent chance of rain after 4pm.  Patchy fog before 10am.  Otherwise, mostly cloudy, with a high near 50.

    High: 50 °F

    Patchy Fog
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain, mainly after 10pm.  Patchy fog.  Otherwise, mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain
    and Patchy
    Fog

  • New Year's Day

    New Year's Day: Rain likely, mainly between 10am and 4pm.  Cloudy, with a high near 50.

    High: 50 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly after 10pm.  Cloudy, with a low around 48.

    Low: 48 °F

    Rain Likely

Detailed Forecast

Tonight
Patchy fog before 2am, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 37. Calm wind.
Monday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 50. Calm wind becoming northeast around 5 mph in the afternoon.
Monday Night
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 36. Calm wind.
Tuesday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 50. Calm wind becoming east northeast around 5 mph in the morning.
Tuesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 39. Calm wind.
Wednesday
A 10 percent chance of rain after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 50.
Wednesday Night
A 40 percent chance of rain, mainly after 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 44.
New Year's Day
Rain likely, mainly between 10am and 4pm. Cloudy, with a high near 50.
Thursday Night
Rain likely, mainly after 10pm. Cloudy, with a low around 48.
Friday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 55.
Friday Night
A chance of rain. Mostly cloudy, with a low around 48.
Saturday
A chance of rain. Mostly cloudy, with a high near 54.
Saturday Night
A chance of rain. Cloudy, with a low around 48.
Sunday
A chance of rain. Partly sunny, with a high near 54.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Discovery Bay CA
 37.87°N 121.63°W (Elev. 16 ft)
12:27 pm PST Dec 28, 2025
5pm PST Dec 28, 2025-6pm PST Jan 4, 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