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

4 Miles ENE Clayton CA

  • Today

    Today: Cloudy, with a high near 54. East wind around 6 mph becoming north in the morning.

    High: 54 °F

    Cloudy

  • Tonight

    Tonight: Cloudy, with a low around 47. West wind 3 to 6 mph.

    Low: 47 °F

    Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 58. West southwest wind around 6 mph.

    High: 58 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 5am.  Otherwise, partly cloudy, with a low around 45. Southwest wind around 9 mph.

    Low: 45 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 54. West wind around 6 mph becoming north in the morning.

    High: 54 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, with a high near 54. East wind around 6 mph becoming north in the morning.
Tonight
Cloudy, with a low around 47. West wind 3 to 6 mph.
Thursday
Partly sunny, with a high near 58. West southwest wind around 6 mph.
Thursday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 45. Southwest wind around 9 mph.
Friday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 54. West wind around 6 mph becoming north in the morning.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 55.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Partly sunny, with a high near 53.
Sunday Night
Mostly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 54.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Clayton CA
 37.95°N 121.88°W (Elev. 1358 ft)
2:13 am PST Jan 21, 2026
10am PST Jan 21, 2026-6pm PST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database