Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

BLACK DIAMOND (PIBC1)

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

NA

55°F

13°C

Humidity 41%
Wind Speed WNW 0 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 19 Jan 11:28 PM PST
Extended Forecast for

Bethel Island CA

  • Overnight

    Overnight: Patchy dense fog.  Otherwise, mostly cloudy, with a low around 40. Light north northeast wind.

    Low: 40 °F

    Patchy Dense
    Fog

  • Tuesday

    Tuesday: Patchy dense fog before noon.  Otherwise, mostly cloudy, with a high near 55. North northeast wind 3 to 5 mph.

    High: 55 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Patchy fog before midnight, then patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am.  Otherwise, cloudy, with a high near 58. Light north wind.

    High: 58 °F

    Patchy Fog
    then Cloudy

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 47. Light west wind.

    Low: 47 °F

    Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 40. Light north northeast wind.
Tuesday
Patchy dense fog before noon. Otherwise, mostly cloudy, with a high near 55. North northeast wind 3 to 5 mph.
Tuesday Night
Patchy fog before midnight, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 44. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, cloudy, with a high near 58. Light north wind.
Wednesday Night
Cloudy, with a low around 47. Light west wind.
Thursday
Partly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 42.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 43.
Sunday
Partly sunny, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Partly sunny, with a high near 59.
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ABOUT THIS FORECAST

 
Point Forecast:
Bethel Island CA
 38.03°N 121.64°W (Elev. 3 ft)
1:15 pm PST Jan 19, 2026
12am PST Jan 20, 2026-6pm PST Jan 26, 2026
 
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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