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.

53°F

12°C

Humidity	74%
Wind Speed	SW 5 MPH
Barometer	NA
Dewpoint	45°F (7°C)
Visibility	NA
Last update	11 Apr 11:10 PM PDT

More Information:

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

Extended Forecast for

Cupertino CA

Overnight
Low: 46 °F
Chance
Showers
Sunday
High: 60 °F
Showers
Likely
Sunday Night
Low: 45 °F
Chance
Showers
Monday
High: 64 °F
Mostly Sunny
Monday Night
Low: 46 °F
Mostly Clear
Tuesday
High: 66 °F
Mostly Sunny
Tuesday Night
Low: 44 °F
Mostly Clear
Wednesday
High: 65 °F
Mostly Sunny
Wednesday Night
Low: 48 °F
Mostly Cloudy

Detailed Forecast

Overnight

A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. South southwest wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

Showers likely before 8am, then showers likely and possibly a thunderstorm between 8am and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 60. Southwest wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night

A chance of showers before 9pm, then a slight chance of showers after 11pm. Partly cloudy, with a low around 45. West southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.

Monday

Mostly sunny, with a high near 64. Calm wind becoming northwest 5 to 7 mph in the afternoon.

Monday Night

Mostly clear, with a low around 46. West northwest wind 5 to 9 mph becoming light after midnight.

Tuesday

Mostly sunny, with a high near 66.

Tuesday Night

Mostly clear, with a low around 44.

Wednesday

Mostly sunny, with a high near 65.

Wednesday Night

Mostly cloudy, with a low around 48.