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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

52°F

11°C

Humidity 100%
Wind Speed SSE 3 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Last update 01 Jan 12:28 PM PST
Extended Forecast for

5 Miles SSW Antioch CA

Wind Advisory January 2, 01:00pm until January 3, 01:00pm
Click here for hazard details and duration
Wind Advisory

  • New Year's Day

    New Year's Day: A 40 percent chance of rain. Mostly cloudy, with a high near 57. South wind 15 to 20 mph decreasing to 9 to 14 mph. Winds could gust as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Chance Rain

  • Tonight

    Tonight: A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 49. South southeast wind 7 to 10 mph, with gusts as high as 23 mph.

    Low: 49 °F

    Chance Rain
    then Mostly
    Cloudy

  • Friday

    Friday: Rain likely after 4pm. Mostly cloudy, with a high near 55. East southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Mostly Cloudy
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain. Low around 54. South southeast wind around 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Rain

  • Saturday

    Saturday: Rain before 1pm, then showers and possibly a thunderstorm after 1pm. High near 57. South wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 57 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 7pm, then rain after 7pm. Low around 53. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Showers

  • Sunday

    Sunday: Rain. High near 54. Chance of precipitation is 100%.

    High: 54 °F

    Rain

  • Sunday Night

    Sunday Night: Rain. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Rain

  • Monday

    Monday: Rain likely. Cloudy, with a high near 51.

    High: 51 °F

    Rain Likely

Detailed Forecast

New Year's Day
A 40 percent chance of rain. Mostly cloudy, with a high near 57. South wind 15 to 20 mph decreasing to 9 to 14 mph. Winds could gust as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 49. South southeast wind 7 to 10 mph, with gusts as high as 23 mph.
Friday
Rain likely after 4pm. Mostly cloudy, with a high near 55. East southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Low around 54. South southeast wind around 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain before 1pm, then showers and possibly a thunderstorm after 1pm. High near 57. South wind 14 to 18 mph, with gusts as high as 30 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 before 7pm, then rain after 7pm. Low around 53. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Rain. High near 54. Chance of precipitation is 100%.
Sunday Night
Rain. Mostly cloudy, with a low around 48.
Monday
Rain likely. Cloudy, with a high near 51.
Monday Night
A chance of rain, mainly before 4am. Mostly cloudy, with a low around 44.
Tuesday
A slight chance of rain. Mostly cloudy, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
A slight chance of rain. Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Antioch CA
 37.94°N 121.82°W (Elev. 600 ft)
Last Update:
12:32 pm PST Jan 1, 2026
Forecast Valid:
1pm PST Jan 1, 2026-6pm PST Jan 7, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation