Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend
Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >
Current conditions at
LOS ALTOS (LOAC1)
Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.NA
62°F
17°C
| Humidity | 82% |
| Wind Speed | NW 0 MPH |
| Barometer | NA |
| Dewpoint | 56°F (13°C) |
| Visibility | NA |
| Last update | 09 Aug 03:10 AM PDT |
Extended Forecast for
Portola Valley CA
Today
High: 91 °F
Sunny
Tonight
Low: 56 °F
Mostly Clear
Sunday
High: 89 °F
Sunny
Sunday Night
Low: 55 °F
Clear
Monday
High: 86 °F
Sunny
Monday Night
Low: 55 °F
Mostly Clear
Tuesday
High: 83 °F
Sunny
Tuesday Night
Low: 55 °F
Mostly Clear
Wednesday
High: 80 °F
Mostly Sunny
Detailed Forecast
Today
Sunny, with a high near 91. Light and variable wind becoming southwest 8 to 13 mph in the afternoon.
Tonight
Mostly clear, with a low around 56. Southwest wind 9 to 14 mph becoming light west in the evening.
Sunday
Sunny, with a high near 89. Calm wind becoming north around 5 mph.
Sunday Night
Clear, with a low around 55. West southwest wind 8 to 13 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 86. Calm wind becoming west southwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 55.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Mostly sunny, with a high near 80.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 78.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Portola Valley CA
37.39°N 122.23°W (Elev. 397 ft)
37.39°N 122.23°W (Elev. 397 ft)
1:26 am PDT Aug 9, 2025
4am PDT Aug 9, 2025-6pm PDT Aug 15, 2025
Additional Resources
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