Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

76°F

24°C

Humidity 36%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Heat Index78°F (26°C)
Last update 14 Mar 04:10 PM PDT
Extended Forecast for

3 Miles SSE Portola Valley CA

Heat Advisory March 16, 10:00am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Tonight

    Tonight: Mostly clear, with a low around 53. Northwest wind 5 to 10 mph, with gusts as high as 21 mph.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74. North wind around 6 mph.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 81. Calm wind becoming north around 5 mph in the afternoon.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 67. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 67 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 67.

    Low: 67 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 53. Northwest wind 5 to 10 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 74. North wind around 6 mph.
Sunday Night
Partly cloudy, with a low around 63. North northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 81. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
Clear, with a low around 67. North northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Clear, with a low around 67.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Sunny, with a high near 79.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Portola Valley CA
 37.33°N 122.18°W (Elev. 1998 ft)
1:26 pm PDT Mar 14, 2026
4pm PDT Mar 14, 2026-6pm PDT Mar 21, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database