Tracking Late Season Winter Storms; Unusual Early-Season Heat Wave in the Southwest

Heavy snow and high winds continue in the Great Lakes and Northeast. A moderate atmospheric river will continue to bring heavy precipitation to the Pacific Northwest and northern Rockies. A major winter storm will develop across the northern High Plains tonight into Saturday and rapidly strengthen as it moves into the Great Lakes on Sunday. Above-average temperatures expected in the Southwest. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

67°F

19°C

Humidity 58%
Wind Speed ENE 1 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 13 Mar 11:10 AM PDT
Extended Forecast for

2 Miles NNE Portola Valley CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 73. North northwest wind 3 to 7 mph.

    High: 73 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 47. West southwest wind around 6 mph.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 73. West southwest wind 5 to 9 mph becoming north northwest in the morning.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49. West northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 73. North northwest wind 3 to 7 mph.
Tonight
Partly cloudy, with a low around 47. West southwest wind around 6 mph.
Saturday
Sunny, with a high near 73. West southwest wind 5 to 9 mph becoming north northwest in the morning.
Saturday Night
Mostly clear, with a low around 49. West northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Sunny, with a high near 88.
Monday Night
Clear, with a low around 59.
Tuesday
Sunny, with a high near 90.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Clear, with a low around 58.
Thursday
Sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Portola Valley CA
 37.4°N 122.2°W (Elev. 397 ft)
11:28 am PDT Mar 13, 2026
12pm PDT Mar 13, 2026-6pm PDT Mar 19, 2026
 
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Additional Resources

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Hourly Weather Forecast

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