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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

59°F

15°C

Humidity 72%
Wind Speed NNE 19 MPH
Barometer NA
Dewpoint 50°F (10°C)
Visibility NA
Last update 24 Dec 12:28 AM PST
Extended Forecast for

Bethel Island CA

Flood Watch December 24, 01:24am until December 26, 10:00pm
Wind Advisory until December 24, 04:00am
Click here for hazard details and duration
Flood Watch
Wind Advisory
  •  
    Flood Watch December 24, 01:24am until December 26, 10:00pm
    Wind Advisory until December 24, 04:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 56 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers likely before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 60. South southwest wind 5 to 10 mph becoming southeast 11 to 16 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 60 °F

    Chance
    Showers then
    Severe
    Thunderstorms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 3am, then showers between 3am and 4am, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe. Steady temperature around 57. Breezy, with a southeast wind 20 to 25 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Breezy.
    Severe
    Thunderstorms
    then Showers

  • Christmas Day

    Christmas Day: Showers and possibly a thunderstorm. High near 56. Breezy, with a south wind 20 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 48. South wind around 17 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Showers

  • Friday

    Friday: Showers, with thunderstorms also possible after 4pm. High near 54. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 54 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers before 10am. Mostly cloudy, with a high near 52.

    High: 52 °F

    Slight Chance
    Showers then
    Partly Sunny

Detailed Forecast

Overnight
Showers. Low around 56. Breezy, with a southeast wind around 26 mph, with gusts as high as 48 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers likely before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 60. South southwest wind 5 to 10 mph becoming southeast 11 to 16 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms before 3am, then showers between 3am and 4am, then showers and possibly a thunderstorm after 4am. Some of the storms could be severe. Steady temperature around 57. Breezy, with a southeast wind 20 to 25 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Christmas Day
Showers and possibly a thunderstorm. High near 56. Breezy, with a south wind 20 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers and possibly a thunderstorm. Low around 48. South wind around 17 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Showers, with thunderstorms also possible after 4pm. High near 54. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms, mainly between 10pm and 4am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Saturday
A slight chance of showers before 10am. Mostly cloudy, with a high near 52.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Mostly sunny, with a high near 48.
Sunday Night
Patchy fog. Otherwise, partly cloudy, with a low around 38.
Monday
Areas of fog. Otherwise, partly sunny, with a high near 48.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 38.
Tuesday
Areas of fog. Otherwise, partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bethel Island CA
 38.03°N 121.64°W (Elev. 3 ft)
Last Update:
12:27 am PST Dec 24, 2025
Forecast Valid:
1am PST Dec 24, 2025-6pm PST Dec 30, 2025
 
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Additional Resources

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