Tracking Areas of Fire Weather, Winter Weather, and Severe Weather Thursday

Continuation of gusty winds and low relative humidity will bring additional periods of critical fire weather to the southern Plains Thursday and Friday. Another Pacific storm will continue gusty winds and heavy snow over the western mountains into Thursday. Severe thunderstorms are possible across parts of the middle Mississippi into lower Ohio Valleys Thursday afternoon into early evening. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

31°F

-1°C

Humidity 100%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 18 Feb 11:20 PM PST
Extended Forecast for

4 Miles SSE Clayton CA

Extreme Cold Warning February 20, 01:00am until February 20, 09:00am
Click here for hazard details and duration
Extreme Cold Warning
  • Tonight

    Tonight: Rain, possibly mixed with snow, becoming all rain after 4am.  Low around 35. Breezy, with a southeast wind 16 to 23 mph, with gusts as high as 39 mph.  Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 35 °F

    Rain/Snow and
    Breezy

  • Thursday

    Thursday: Rain and snow likely before 3pm, then a slight chance of snow after 4pm.  Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 34 by 10am. Windy, with a west northwest wind 24 to 30 mph, with gusts as high as 46 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 40 °F

    Windy.
    Rain/Snow
    Likely then
    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before 10pm.  Mostly clear, with a low around 33. West northwest wind 10 to 15 mph, with gusts as high as 31 mph.

    Low: 33 °F

    Slight Chance
    Snow then
    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 45. Calm wind becoming east around 6 mph in the morning.

    High: 45 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37. East southeast wind 7 to 9 mph, with gusts as high as 18 mph.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain after 4pm.  Partly sunny, with a high near 50.

    High: 50 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly after 10pm.  Mostly cloudy, with a low around 46. Breezy.  Chance of precipitation is 60%.

    Low: 46 °F

    Rain Likely
    and Breezy

  • Sunday

    Sunday: Rain.  Mostly cloudy, with a high near 55. Breezy.

    High: 55 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain.  Mostly cloudy, with a low around 53. Breezy.

    Low: 53 °F

    Rain and
    Breezy

Detailed Forecast

Tonight
Rain, possibly mixed with snow, becoming all rain after 4am. Low around 35. Breezy, with a southeast wind 16 to 23 mph, with gusts as high as 39 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than a half inch possible.
Thursday
Rain and snow likely before 3pm, then a slight chance of snow after 4pm. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 34 by 10am. Windy, with a west northwest wind 24 to 30 mph, with gusts as high as 46 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
A 20 percent chance of snow before 10pm. Mostly clear, with a low around 33. West northwest wind 10 to 15 mph, with gusts as high as 31 mph.
Friday
Partly sunny, with a high near 45. Calm wind becoming east around 6 mph in the morning.
Friday Night
Partly cloudy, with a low around 37. East southeast wind 7 to 9 mph, with gusts as high as 18 mph.
Saturday
A 30 percent chance of rain after 4pm. Partly sunny, with a high near 50.
Saturday Night
Rain likely, mainly after 10pm. Mostly cloudy, with a low around 46. Breezy. Chance of precipitation is 60%.
Sunday
Rain. Mostly cloudy, with a high near 55. Breezy.
Sunday Night
Rain. Mostly cloudy, with a low around 53. Breezy.
Monday
Rain. Mostly cloudy, with a high near 57. Breezy.
Monday Night
Rain. Mostly cloudy, with a low around 51.
Tuesday
Rain. Mostly cloudy, with a high near 56.
Tuesday Night
Rain. Mostly cloudy, with a low around 48.
Wednesday
Rain likely. Mostly cloudy, with a high near 53.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
5:13 pm PST Feb 18, 2026
11pm PST Feb 18, 2026-6pm PST Feb 25, 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