Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

56°F

13°C

Humidity 36%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 21 Jan 10:28 AM PST
Extended Forecast for

2 Miles NNW Discovery Bay CA

  • Today

    Today: Areas of fog before noon.  Otherwise, cloudy, with a high near 54. Calm wind.

    High: 54 °F

    Areas Fog

  • Tonight

    Tonight: Patchy dense fog before 10pm, then widespread dense fog after midnight.  Otherwise, cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Dense Fog

  • Thursday

    Thursday: Patchy fog before 9am.  Otherwise, partly sunny, with a high near 63. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 63 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 45. Light southwest wind.

    Low: 45 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 10am.  Otherwise, partly sunny, with a high near 58. Calm wind becoming north around 5 mph in the afternoon.

    High: 58 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 56.

    High: 56 °F

    Mostly Cloudy

Detailed Forecast

Today
Areas of fog before noon. Otherwise, cloudy, with a high near 54. Calm wind.
Tonight
Patchy dense fog before 10pm, then widespread dense fog after midnight. Otherwise, cloudy, with a low around 46. Calm wind.
Thursday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 63. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 45. Light southwest wind.
Friday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 58. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Mostly cloudy, with a high near 56.
Sunday Night
Mostly cloudy, with a low around 40.
Monday
Partly sunny, with a high near 58.
Monday Night
Mostly cloudy, with a low around 39.
Tuesday
Mostly cloudy, with a high near 58.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Discovery Bay CA
 37.92°N 121.61°W (Elev. 7 ft)
2:13 am PST Jan 21, 2026
11am PST Jan 21, 2026-6pm PST Jan 27, 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