Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

LA HONDA (LAHC1)

Lat: 37.30523°NLon: 122.25525°WElev: 804.0ft.

50°F

10°C

Humidity	98%
Wind Speed	ESE 1 MPH
Barometer	NA
Dewpoint	49°F (9°C)
Visibility	NA
Last update	11 Apr 07:07 AM PDT

More Information:

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

Extended Forecast for

Portola Valley CA

Today
High: 62 °F
Chance Rain
then Showers
Tonight
Low: 47 °F
Heavy Rain
Sunday
High: 59 °F
Showers
Sunday Night
Low: 45 °F
Slight Chance
Rain
Monday
High: 63 °F
Mostly Sunny
Monday Night
Low: 46 °F
Mostly Clear
Tuesday
High: 65 °F
Sunny
Tuesday Night
Low: 45 °F
Mostly Clear
Wednesday
High: 65 °F
Mostly Sunny

Detailed Forecast

Today

Rain and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 62. South southwest wind 6 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Some of the storms could produce heavy rainfall. Low around 47. Southwest wind 10 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Sunday

Showers and possibly a thunderstorm. High near 59. Southwest wind around 11 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 20 percent chance of rain. Partly cloudy, with a low around 45. West southwest wind 5 to 7 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

Monday

Mostly sunny, with a high near 63. Calm wind becoming west northwest around 6 mph in the afternoon.

Monday Night

Mostly clear, with a low around 46.

Tuesday

Sunny, with a high near 65.

Tuesday Night

Mostly clear, with a low around 45.

Wednesday

Mostly sunny, with a high near 65.

Wednesday Night

Partly cloudy, with a low around 47.