Storms and Heavy Rainfall in the Plains and Southern Appalachians; Hazardous Heat in the South and Southeast

Severe thunderstorms with heavy rainfall will be possible across the southern Appalachians through this evening. Thunderstorms are also expected from the northern/central Plains into portions of the Midwest through Tuesday, and severe storms may produce large hail and damaging wind gusts. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

80°F

27°C

Humidity 52%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 61°F (16°C)
Visibility NA
Heat Index81°F (27°C)
Last update 17 Aug 02:10 PM PDT
Extended Forecast for

2 Miles ESE Portola Valley CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 78. West wind 3 to 5 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 56. Light west wind.

    Low: 56 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 81. Light and variable wind.

    High: 81 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82. Light west northwest wind.

    High: 82 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 78. West wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around 56. Light west wind.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 81. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 57. Calm wind.
Wednesday
Mostly sunny, with a high near 82. Light west northwest wind.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 56.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Portola Valley CA
 37.35°N 122.19°W (Elev. 1220 ft)
1:26 pm PDT Aug 17, 2026
2pm PDT Aug 17, 2026-6pm PDT Aug 23, 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