Major Winter Storm to Impact the Mid-Atlantic and Northeast; Inclement Weather in the Pacific Northwest

A major winter storm is expected to bring heavy snow, strong winds, and coastal flooding across the Mid-Atlantic and Northeast that may cause impossible travel conditions and power outages. Blizzard conditions are possible along coastal areas from the DelMarVa Peninsula through southeastern New England. Wet weather and strong winds return to the Pacific Northwest and north-central California. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

28°F

-2°C

Humidity 99%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 20 Feb 03:25 AM PST
Extended Forecast for

4 Miles ENE San Ramon CA

  • Tonight

    Tonight: Patchy fog after 1am.  Otherwise, partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 67. Calm wind.

    High: 67 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: A 40 percent chance of rain after 10pm.  Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain, mainly after 10am.  High near 64. South wind 5 to 8 mph, with gusts as high as 20 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly before 10pm.  Low around 52. South southwest wind 3 to 6 mph.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 52 °F

    Rain then
    Chance Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain before 10am.  Patchy fog before 10am.  Otherwise, partly sunny, with a high near 67.

    High: 67 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 5am.  Otherwise, partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 69.

    High: 69 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 42. Calm wind.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 67. Calm wind.
Monday Night
A 40 percent chance of rain after 10pm. Mostly cloudy, with a low around 51. Calm wind.
Tuesday
Rain, mainly after 10am. High near 64. South wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain, mainly before 10pm. Low around 52. South southwest wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 20 percent chance of rain before 10am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 67.
Wednesday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 48.
Thursday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Partly sunny, with a high near 71.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
A slight chance of rain. Partly sunny, with a high near 71.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 49.
Sunday
Partly sunny, with a high near 67.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE San Ramon CA
 37.79°N 121.9°W (Elev. 725 ft)
12:26 pm PST Feb 22, 2026
5pm PST Feb 22, 2026-6pm PST Mar 1, 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