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Inclement Weather in the Pacific Northwest; Heavy Rain and Thunderstorms in Southern Texas

A series of cold fronts will continue to bring periods of gusty winds, low elevation rainfall, and high elevation snow to the Pacific Northwest this week. Heavy to excessive rainfall may produce areas of flooding over southern Texas through Monday morning. Read More >

Hazardous Weather Conditions

Current conditions at

LOS ALTOS (LOAC1)

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

NA

53°F

12°C

Humidity 86%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 49°F (9°C)
Visibility NA
Last update 09 Nov 03:10 AM PST
Extended Forecast for

Portola Valley CA

Coastal Flood Advisory November 9, 04:01am until November 13, 04:00pm
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory November 9, 04:01am until November 13, 04:00pm

    NOW until 4:00pm Fri

    Coastal Flood Advisory

  • Today

    High: 75 °F

    Patchy Dense
    Fog then
    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Southwest wind around 6 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, sunny, with a high near 77. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 77 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 79. Calm wind.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy dense fog between 7am and 8am. Otherwise, mostly sunny, with a high near 75. Calm wind becoming north 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 53. Southwest wind around 6 mph becoming calm in the evening.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 77. Calm wind becoming north northwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 50. Calm wind.
Veterans Day
Sunny, with a high near 79. Calm wind.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 51.
Saturday
A chance of rain. Patchy fog. Otherwise, mostly sunny, with a high near 69.
Saturday Night
Rain likely. Mostly cloudy, with a low around 50.
Sunday
Rain likely. Mostly cloudy, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.38°N 122.19°W (Elev. 597 ft)
Last Update:
1:26 am PST Nov 9, 2026
Forecast Valid:
4am PST Nov 9, 2026-6pm PST Nov 15, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation