Severe Thunderstorms and Heavy Rainfall Across the Midwest into the Great Lakes Region; Significant Heat in the Southwest

Strong to severe storms may produce damaging winds, isolated hail, and a few tornadoes from the Midwest into the lower Great Lakes. These storms may also produce areas of heavy rain and flash flooding. Significant heat will continue across parts of the Desert Southwest into western Texas and north Alaska. Dangerous heat will also build into the Eastern and Central U.S. and continue into next week. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

87°F

31°C

Humidity 36%
Wind Speed NE 3 MPH
Barometer NA
Dewpoint 57°F (14°C)
Visibility NA
Heat Index86°F (30°C)
Last update 18 Jun 03:10 PM PDT
Extended Forecast for

Portola Valley CA

  • Tonight

    Tonight: Mostly clear, with a low around 49. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 49 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 70. West wind 6 to 16 mph, with gusts as high as 28 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. West wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 71. West northwest wind 8 to 17 mph, with gusts as high as 30 mph.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 48. West northwest wind 13 to 21 mph, with gusts as high as 39 mph.

    Low: 48 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 48.

    Low: 48 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Sunday Night

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

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 49. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Juneteenth
Sunny, with a high near 70. West wind 6 to 16 mph, with gusts as high as 28 mph.
Thursday Night
Mostly clear, with a low around 48. West wind 10 to 15 mph, with gusts as high as 30 mph.
Friday
Sunny, with a high near 71. West northwest wind 8 to 17 mph, with gusts as high as 30 mph.
Friday Night
Clear, with a low around 48. West northwest wind 13 to 21 mph, with gusts as high as 39 mph.
Saturday
Sunny, with a high near 74.
Saturday Night
Clear, with a low around 48.
Sunday
Sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 49.
Monday
Sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.39°N 122.23°W (Elev. 397 ft)
2:30 pm PDT Jun 18, 2025
4pm PDT Jun 18, 2025-6pm PDT Jun 25, 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