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

BLACK DIAMOND (PIBC1)

Lat: 37.95°NLon: 121.88444°WElev: 1600.0ft.

NA

55°F

13°C

Humidity 78%
Wind Speed S 14 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 09 Apr 08:28 PM PDT
Extended Forecast for

2 Miles NNW Discovery Bay CA

  • Tonight

    Tonight: A slight chance of showers before 11pm, then a chance of showers after 3am. Mostly cloudy, with a low around 54. West wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Chance
    Showers

  • Friday

    Friday: Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 68. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. South 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: 53 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers, then showers and possibly a thunderstorm after 11am. High near 65. South southeast wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 48. South wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 11am. 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, mainly before 11pm. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance Rain

  • Monday

    Monday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Monday Night

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

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of showers before 11pm, then a chance of showers after 3am. Mostly cloudy, with a low around 54. West wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 68. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. South 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
A chance of showers, then showers and possibly a thunderstorm after 11am. High near 65. South southeast wind 6 to 15 mph, with gusts as high as 25 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 48. South wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers, with thunderstorms also possible after 11am. 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, mainly before 11pm. Mostly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 45.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Discovery Bay CA
 37.94°N 121.62°W (Elev. 10 ft)
Last Update:
4:46 pm PDT Apr 9, 2026
Forecast Valid:
8pm PDT Apr 9, 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