Severe Thunderstorms in the Southern Plains; Heavy to Excessive Rainfall in South Central Texas

Widespread rain may produce flash flooding across the Southern Plains into the Ozarks today. Numerous instances of flash flooding are expected in south-central Texas, including the Hill Country. There will also be a risk of isolated severe thunderstorms across the southern Plains today, where an instance or two of severe wind, hail, or a brief tornado may occur. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

52°F

11°C

Humidity 97%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 20 Nov 10:10 AM PST
Extended Forecast for

Portola Valley CA

  • Today

    Today: A 30 percent chance of rain.  Partly sunny, with a high near 58. Northwest wind 7 to 15 mph, with gusts as high as 21 mph.  New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Chance Rain

  • Tonight

    Tonight: Partly cloudy, with a low around 44. North wind 7 to 13 mph.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 61. North wind 5 to 9 mph.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 44. Calm wind becoming north northwest around 6 mph.

    Low: 44 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 65. North wind 5 to 8 mph.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Sunday Night

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

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
A 30 percent chance of rain. Partly sunny, with a high near 58. Northwest wind 7 to 15 mph, with gusts as high as 21 mph. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Partly cloudy, with a low around 44. North wind 7 to 13 mph.
Friday
Sunny, with a high near 61. North wind 5 to 9 mph.
Friday Night
Clear, with a low around 44. Calm wind becoming north northwest around 6 mph.
Saturday
Sunny, with a high near 65. North wind 5 to 8 mph.
Saturday Night
Clear, with a low around 46.
Sunday
Sunny, with a high near 64.
Sunday Night
Mostly clear, with a low around 46.
Monday
Mostly sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Mostly sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Mostly sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.37°N 122.22°W (Elev. 597 ft)
7:40 am PST Nov 20, 2025
11am PST Nov 20, 2025-6pm PST Nov 26, 2025
 
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Additional Resources

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Hourly Weather Forecast

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