Heavy Rain and Thunderstorms in the Lower Ohio Valley and Southeast; Flooding Continues Along the East Coast of Florida

An approaching cold front may produce isolated heavy rainfall and severe weather today over portions of the Lower Ohio Valley and Southeast. While the heavy rainfall is ending across east Florida, significant river flooding is forecast along the St. John’s and the Peace rivers through the end of the week as flood waters will be slow to recede. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

70°F

21°C

Humidity 44%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 04 Nov 02:10 PM PST
Extended Forecast for

Portola Valley CA

Coastal Flood Advisory November 4, 03:07pm until November 9, 01:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory November 4, 03:07pm until November 9, 01:00pm

    NOW until 1:00pm Mon

    Coastal Flood Advisory

  • Tonight

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 9am.  Otherwise, sunny, with a high near 72. Light and variable wind.

    High: 72 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. Light and variable wind.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 74. Light north wind.

    High: 74 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 50. Calm wind.

    Low: 50 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. West northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 21 mph.
Thursday
Patchy fog before 9am. Otherwise, sunny, with a high near 72. Light and variable wind.
Thursday Night
Mostly clear, with a low around 49. Light and variable wind.
Friday
Sunny, with a high near 74. Light north wind.
Friday Night
Clear, with a low around 50. Calm wind.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 52.
Veterans Day
A slight chance of rain. Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.39°N 122.23°W (Elev. 397 ft)
1:01 pm PST Nov 4, 2026
3pm PST Nov 4, 2026-6pm PST Nov 11, 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