Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for the High Plains. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

51°F

11°C

Humidity	97%
Wind Speed	SW 1 MPH
Barometer	NA
Dewpoint	50°F (10°C)
Visibility	NA
Last update	21 Apr 08:10 PM PDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles NNW Portola Valley CA

Tonight
Low: 47 °F
Partly Cloudy
then Showers
Likely
Wednesday
High: 65 °F
Showers
Likely
Wednesday Night
Low: 47 °F
Mostly Clear
Thursday
High: 70 °F
Sunny
Thursday Night
Low: 47 °F
Partly Cloudy
Friday
High: 67 °F
Partly Sunny
Friday Night
Low: 49 °F
Mostly Cloudy
Saturday
High: 65 °F
Partly Sunny
Saturday Night
Low: 48 °F
Partly Cloudy

Detailed Forecast

Tonight

A chance of rain between 3am and 5am, then showers likely after 5am. Partly cloudy, with a low around 47. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday

Showers and thunderstorms likely before 2pm, then a slight chance of rain between 2pm and 3pm. Partly sunny, with a high near 65. Calm wind becoming north northwest around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

Mostly clear, with a low around 47. West northwest wind around 5 mph becoming calm in the evening.

Thursday

Sunny, with a high near 70. Calm wind becoming northwest 5 to 7 mph in the afternoon.

Thursday Night

Partly cloudy, with a low around 47. West northwest wind 5 to 9 mph becoming calm in the evening.

Friday

Partly sunny, with a high near 67.

Friday Night

Mostly cloudy, with a low around 49.

Saturday

Partly sunny, with a high near 65.