Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

60°F

16°C

Humidity 53%
Wind Speed WSW 4 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 15 Mar 11:10 PM PDT
Extended Forecast for

2 Miles SE 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: Partly cloudy, with a steady temperature around 60. Calm wind.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 60. Calm wind.

    Low: 60 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Calm wind.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 62. Light and variable wind.

    Low: 62 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a steady temperature around 60. Calm wind.
Monday
Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
Clear, with a low around 60. Calm wind.
Tuesday
Sunny, with a high near 88. Calm wind.
Tuesday Night
Clear, with a low around 62. Light and variable wind.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Clear, with a low around 62.
Thursday
Sunny, with a high near 88.
Thursday Night
Clear, with a low around 62.
Friday
Sunny, with a high near 89.
Friday Night
Mostly clear, with a low around 59.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Mostly cloudy, with a low around 52.
Sunday
Partly sunny, with a high near 72.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Portola Valley CA
 37.35°N 122.19°W (Elev. 1220 ft)
1:25 pm PDT Mar 15, 2026
11pm PDT Mar 15, 2026-6pm PDT Mar 22, 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