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.

55°F

13°C

Humidity	86%
Wind Speed	SW 6 MPH
Barometer	NA
Dewpoint	51°F (11°C)
Visibility	NA
Last update	11 Apr 12:07 PM PDT

More Information:

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

Extended Forecast for

4 Miles S Portola Valley CA

This Afternoon
High: 56 °F
Heavy Rain
Tonight
Low: 47 °F
Heavy Rain
Sunday
High: 54 °F
Showers
Likely
Sunday Night
Low: 46 °F
Chance
Showers
Monday
High: 60 °F
Mostly Sunny
Monday Night
Low: 48 °F
Mostly Clear
Tuesday
High: 61 °F
Mostly Sunny
Tuesday Night
Low: 46 °F
Mostly Clear
Wednesday
High: 61 °F
Mostly Sunny

Detailed Forecast

This Afternoon

A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then showers and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 56. South wind around 11 mph, with gusts as high as 30 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 thunderstorms, mainly before 2am, then showers likely and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 47. Southwest wind 8 to 10 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Sunday

A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 54. Southwest wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 30 percent chance of showers. Mostly cloudy, with a low around 46. West southwest wind around 6 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 60. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

Monday Night

Mostly clear, with a low around 48.

Tuesday

Mostly sunny, with a high near 61.

Tuesday Night

Mostly clear, with a low around 46.

Wednesday

Mostly sunny, with a high near 61.

Wednesday Night

Partly cloudy, with a low around 49.