Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Hazardous Weather Conditions

Current conditions at

LOS ALTOS (LOAC1)

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

52°F

11°C

Humidity	97%
Wind Speed	WSW 2 MPH
Barometer	NA
Dewpoint	51°F (11°C)
Visibility	NA
Last update	03 Nov 05:10 AM PST

More Information:

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

Extended Forecast for

2 Miles NNW Portola Valley CA

Coastal Flood Advisory November 4, 08:00am until November 8, 02:00pm

Wind Advisory November 4, 10:00pm until November 5, 04:00pm

Click here for hazard details and duration

Coastal Flood Advisory

Wind Advisory

Today
High: 73 °F
Sunny
Tonight
Low: 51 °F
Mostly Clear
Tuesday
High: 74 °F
Partly Sunny
Tuesday Night
Low: 56 °F
Chance Rain
then Rain
Wednesday
High: 68 °F
Rain
Wednesday Night
Low: 52 °F
Chance Rain
then Patchy
Fog
Thursday
High: 71 °F
Areas Fog
then Sunny
Thursday Night
Low: 52 °F
Partly Cloudy
Friday
High: 74 °F
Mostly Sunny

Detailed Forecast

Today

Sunny, with a high near 73. Calm wind becoming north around 5 mph.

Tonight

Mostly clear, with a low around 51. Calm wind.

Tuesday

Partly sunny, with a high near 74. Calm wind becoming south 5 to 7 mph in the afternoon.

Tuesday Night

Rain, mainly after 4am. Low around 56. South wind 11 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday

Rain, mainly before 4pm. High near 68. South wind 18 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Night

A 40 percent chance of rain before 10pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 52. New precipitation amounts of less than a tenth of an inch possible.

Thursday

Areas of fog before 8am. Otherwise, mostly sunny, with a high near 71.

Thursday Night

Partly cloudy, with a low around 52.

Friday

Mostly sunny, with a high near 74.

Friday Night

Partly cloudy, with a low around 54.

Saturday

Mostly sunny, with a high near 76.

Saturday Night

A slight chance of rain. Partly cloudy, with a low around 54.