Atmospheric River Continues to Impact the Northwest U.S.; Gusty to High Winds in the Northeast U.S.

A strong atmospheric river will continue moderate to heavy rainfall with possible flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. into Thursday. Additional impacts are likely into Friday with a cold front. A fast-moving storm system will cross the Northeast U.S. Wednesday into Thursday with gusty to high winds and areas of rain and high elevation snow showers. Read More >

Hazardous Weather Conditions

Current conditions at

LOS ALTOS (LOAC1)

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

63°F

17°C

Humidity	74%
Wind Speed	W 2 MPH
Barometer	NA
Dewpoint	55°F (13°C)
Visibility	NA
Last update	04 Nov 06:10 PM PST

More Information:

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

Extended Forecast for

3 Miles NW Portola Valley CA

Coastal Flood Advisory November 4, 06:47pm 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

Coastal Flood Advisory November 4, 06:47pm until November 8, 02:00pm
NOW until 2:00pm Sat
Coastal Flood Advisory
Tonight
Low: 54 °F
Chance Rain
then Rain and
Breezy
Wednesday
High: 65 °F
Showers and
Breezy
Wednesday Night
Low: 52 °F
Chance Rain
Thursday
High: 70 °F
Areas Fog
then Sunny
Thursday Night
Low: 52 °F
Partly Cloudy
Friday
High: 71 °F
Patchy Fog
then Mostly
Sunny
Friday Night
Low: 52 °F
Partly Cloudy
then Patchy
Fog
Saturday
High: 74 °F
Patchy Fog
then Mostly
Sunny

Detailed Forecast

Tonight

Rain, mainly after 4am. Low around 54. Breezy, with a south wind 18 to 26 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday

Rain before 10am, then showers and possibly a thunderstorm between 10am and 4pm, then a chance of rain and thunderstorms after 4pm. High near 65. Breezy, with a south wind 23 to 28 mph decreasing to 16 to 21 mph in the afternoon. Winds could gust as high as 43 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday Night

A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 52. South southwest wind 3 to 8 mph. Winds could gust as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.

Thursday

Areas of fog before 9am. Otherwise, mostly sunny, with a high near 70. Calm wind becoming north around 6 mph in the morning.

Thursday Night

Partly cloudy, with a low around 52. West wind 5 to 9 mph becoming calm in the evening.

Friday

Patchy fog before 9am. Otherwise, partly sunny, with a high near 71.

Friday Night

Patchy fog after 5am. Otherwise, partly cloudy, with a low around 52.

Saturday

Patchy fog before 8am. Otherwise, mostly sunny, with a high near 74.

Saturday Night

Partly cloudy, with a low around 52.