Winter Storm in the Central Appalachians through the Northeast; Heavy Snow in the Great Basin and Rockies

A winter storm will impact the central Appalachians to the Northeast through the night. Accumulating snow is expected for interior New England and the northern Mid-Atlantic. Scattered showers and occasional thunderstorms will persist across Florida and the Southeast coast. Locally heavy mountain snow is expected in the Great Basin and Rockies over the next couple of days. Read More >

Current conditions at

LOS ALTOS (LOAC1)

Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.

NA

46°F

8°C

Humidity 95%
Wind Speed SW 2 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 03 Dec 02:10 AM PST
Extended Forecast for

2 Miles N Portola Valley CA

Coastal Flood Advisory December 3, 03:03am until December 7, 03:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory December 3, 03:03am until December 7, 03:00pm

    NOW until 3:00pm Sun

    Coastal Flood Advisory

  • Overnight

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. East southeast wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 18 mph.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 40. Calm wind becoming northwest around 5 mph after midnight.

    Low: 40 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 62. Light and variable wind.

    High: 62 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. West northwest wind 3 to 5 mph.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

Detailed Forecast

Overnight
Partly cloudy, with a low around 42. North northwest wind around 7 mph.
Wednesday
Mostly sunny, with a high near 61. East southeast wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Partly cloudy, with a low around 40. Calm wind becoming northwest around 5 mph after midnight.
Thursday
Mostly sunny, with a high near 62. Light and variable wind.
Thursday Night
Mostly clear, with a low around 43. West northwest wind 3 to 5 mph.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 46.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 48.
Sunday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 65.
Sunday Night
Patchy fog. Otherwise, partly cloudy, with a low around 47.
Monday
Patchy fog. Otherwise, mostly sunny, with a high near 67.
Monday Night
Patchy fog. Otherwise, mostly clear, with a low around 46.
Tuesday
Patchy fog. Otherwise, mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Portola Valley CA
 37.39°N 122.23°W (Elev. 397 ft)
12:39 am PST Dec 3, 2025
3am PST Dec 3, 2025-6pm PST Dec 9, 2025
 
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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