Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

70°F

21°C

Humidity 29%
Wind Speed S 8 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 15 Mar 07:28 PM PDT
Extended Forecast for

Clayton CA

Heat Advisory March 16, 10:00am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Tonight

    Tonight: Partly cloudy, with a low around 56. Southwest wind around 6 mph becoming calm  after midnight.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the morning.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 57. West wind around 5 mph becoming calm  after midnight.

    Low: 57 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 59. North wind around 6 mph becoming calm  in the evening.

    Low: 59 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 56. Southwest wind around 6 mph becoming calm after midnight.
Monday
Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the morning.
Monday Night
Clear, with a low around 57. West wind around 5 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 91. Calm wind becoming northeast around 6 mph in the afternoon.
Tuesday Night
Clear, with a low around 59. North wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 94.
Thursday Night
Clear, with a low around 61.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 60.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 82.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.94°N 121.94°W (Elev. 400 ft)
1:25 pm PDT Mar 15, 2026
8pm PDT Mar 15, 2026-6pm PDT Mar 22, 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