Major Winter Storm in the North-Central U.S.; Severe Weather from the Mid-South to Ohio Valley

A major winter storm will bring a swath of heavy snowfall, strong winds, blizzard conditions and freezing rain to the Northern Plains into the Great Lakes region. 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. Critical fire weather concerns shift to the southern Rockies and Plains. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

56°F

13°C

Humidity 29%
Wind Speed N 24 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Last update 15 Mar 08:05 AM PDT
Extended Forecast for

5 Miles NNE San Ramon CA

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

    Today: Sunny, with a high near 84. North wind around 8 mph, with gusts as high as 18 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 54. North wind 5 to 7 mph becoming calm  after midnight.

    Low: 54 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 87. North wind 3 to 6 mph.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 56. North northwest wind around 5 mph becoming light and variable  after midnight.

    Low: 56 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 84. North wind around 8 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 54. North wind 5 to 7 mph becoming calm after midnight.
Monday
Sunny, with a high near 87. North wind 3 to 6 mph.
Monday Night
Clear, with a low around 56. North northwest wind around 5 mph becoming light and variable after midnight.
Tuesday
Sunny, with a high near 91. Calm wind becoming northeast around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 58.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Clear, with a low around 58.
Thursday
Sunny, with a high near 93.
Thursday Night
Clear, with a low around 60.
Friday
Sunny, with a high near 94.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNE San Ramon CA
 37.83°N 121.91°W (Elev. 1220 ft)
2:40 am PDT Mar 15, 2026
10am PDT Mar 15, 2026-6pm PDT Mar 21, 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