Inclement Weather in the Pacific Northwest; Severe Thunderstorms in the Southeast; Impending Winter Storm

An approaching storm will bring rain and high elevation snow to Pacific Northwest through the weekend. Isolated severe thunderstorms are possible across parts of the Southeast today into this evening as a low strengthens over the Southeast. This system will form into a winter storm on Sunday that will bring heavy snow, high winds, and coastal flooding to the Mid-Atlantic and Northeast into Monday. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

Lat: 37.61961°NLon: 122.36558°WElev: 10.0ft.

Partly Cloudy

51°F

11°C

Humidity 76%
Wind Speed SSE 10 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 21 Feb 08:56 PM PST
Extended Forecast for

San Mateo CA

  • Tonight

    Tonight: Partly cloudy, with a low around 48. Southeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 64. Southeast wind around 8 mph.

    High: 64 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: A 10 percent chance of rain after 4pm.  Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 66. Light east northeast wind.

    High: 66 °F

    Patchy Fog
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain likely, mainly after 4am.  Mostly cloudy, with a low around 55. South wind 3 to 5 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain.  High near 62. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly before 10pm.  Low around 55. Chance of precipitation is 80%.

    Low: 55 °F

    Rain then
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain, mainly before 10am.  Mostly cloudy, with a high near 64.

    High: 64 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A slight chance of rain.  Mostly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 48. Southeast wind around 10 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 64. Southeast wind around 8 mph.
Sunday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 47. Calm wind.
Monday
A 10 percent chance of rain after 4pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 66. Light east northeast wind.
Monday Night
Rain likely, mainly after 4am. Mostly cloudy, with a low around 55. South wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain. High near 62. 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 55. Chance of precipitation is 80%.
Wednesday
A chance of rain, mainly before 10am. Mostly cloudy, with a high near 64.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 68.
Friday Night
Mostly cloudy, with a low around 54.
Saturday
A slight chance of rain. Partly sunny, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.58°N 122.33°W (Elev. 33 ft)
12:26 pm PST Feb 21, 2026
9pm PST Feb 21, 2026-6pm PST Feb 28, 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