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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Hazardous Weather Conditions

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

46°F

8°C

Humidity 100%
Wind Speed S 10 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 26 Dec 06:28 PM PST
Extended Forecast for

2 Miles WNW Oakley CA

Flood Watch December 26, 06:45pm until December 26, 10:00pm
Click here for hazard details and duration
...
  •  
    Flood Watch December 26, 06:45pm until December 26, 10:00pm

    NOW until 10:00pm Fri

    Flood Watch

  • Tonight

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 50. West wind 6 to 8 mph becoming north northwest in the afternoon.

    High: 50 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 40. Northwest wind around 7 mph.

    Low: 40 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 48. North wind around 8 mph.

    High: 48 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. North wind 3 to 5 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 46. Southwest wind 7 to 9 mph.
Saturday
Mostly sunny, with a high near 50. West wind 6 to 8 mph becoming north northwest in the afternoon.
Saturday Night
Increasing clouds, with a low around 40. Northwest wind around 7 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 48. North wind around 8 mph.
Sunday Night
Mostly clear, with a low around 39. North wind 3 to 5 mph.
Monday
Sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 42.
New Year's Day
A slight chance of showers. Cloudy, with a high near 50.
Thursday Night
A chance of showers. Cloudy, with a low around 46.
Friday
A chance of showers. Partly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Oakley CA
 38.01°N 121.75°W (Elev. 13 ft)
Last Update:
12:27 pm PST Dec 26, 2025
Forecast Valid:
6pm PST Dec 26, 2025-6pm PST Jan 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation