National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rain and Flooding Concerns in Hawaii; Severe Weather this Weekend in the Plains; Pacific Storm in the West

A storm system near the Hawaiian Islands is expected to bring periods of heavy rainfall, strong winds, and isolated strong to severe thunderstorms through Friday. Several rounds of severe thunderstorms are forecast to impact parts of the Great Plains into the Midwest this weekend into next week. Moderate to heavy rainfall and high elevation snow is expected this weekend over California and Oregon. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

54°F

12°C

Humidity 88%
Wind Speed W 1 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Last update 10 Apr 03:10 AM PDT
Extended Forecast for

Cupertino CA

  • Overnight

    Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 52. Light south southeast wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 66. Light southeast wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 66 °F

    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 11pm, then rain likely, mainly between 11pm and midnight. Mostly cloudy, with a low around 51. South southeast wind 5 to 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Showers
    Likely

  • Saturday

    Saturday: Rain, mainly between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 63. South wind 5 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 46. South wind 9 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 46 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 59. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

  • Monday

    Monday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 52. Light south southeast wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 66. Light southeast wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms likely before 11pm, then rain likely, mainly between 11pm and midnight. Mostly cloudy, with a low around 51. South southeast wind 5 to 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain, mainly between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 63. South wind 5 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm. Low around 46. South wind 9 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Showers and possibly a thunderstorm. High near 59. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Mostly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cupertino CA
 37.31°N 122.06°W (Elev. 610 ft)
Last Update:
2:51 am PDT Apr 10, 2026
Forecast Valid:
3am PDT Apr 10, 2026-6pm PDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation