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

LOS ALTOS (LOAC1)

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

54°F

12°C

Humidity	100%
Wind Speed	WNW 0 MPH
Barometer	NA
Dewpoint	54°F (12°C)
Visibility	NA
Last update	10 Apr 11:10 PM PDT

More Information:

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

Extended Forecast for

5 Miles WSW Cupertino CA

Tonight
Low: 53 °F
Chance Rain
Saturday
High: 55 °F
Chance Rain
then Heavy
Rain
Saturday Night
Low: 47 °F
Heavy Rain
Sunday
High: 52 °F
Showers
Sunday Night
Low: 48 °F
Chance Rain
Monday
High: 58 °F
Mostly Sunny
Monday Night
Low: 48 °F
Mostly Clear
Tuesday
High: 60 °F
Mostly Sunny
Tuesday Night
Low: 48 °F
Mostly Clear

Detailed Forecast

Tonight

A chance of rain before 3am, then a slight chance of rain after 4am. Mostly cloudy, with a steady temperature around 53. Southwest wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

Saturday

A chance of rain and thunderstorms, then showers and possibly a thunderstorm after 3pm. Some of the storms could produce heavy rainfall. High near 55. South wind 9 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

Showers and thunderstorms before midnight, then showers and possibly a thunderstorm, mainly after midnight. Some of the storms could produce heavy rainfall. Low around 47. Southwest wind 11 to 15 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Sunday

Showers and possibly a thunderstorm. High near 52. Southwest wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 30 percent chance of rain. Mostly cloudy, with a low around 48. West southwest wind 3 to 7 mph. Winds could gust as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.

Monday

Mostly sunny, with a high near 58.

Monday Night

Mostly clear, with a low around 48.

Tuesday

Mostly sunny, with a high near 60.

Tuesday Night

Mostly clear, with a low around 48.

Wednesday

Mostly sunny, with a high near 61.

Wednesday Night

Partly cloudy, with a low around 49.