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

57°F

14°C

Humidity 33%
Wind Speed N 4 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 18 Jan 07:28 PM PST
Extended Forecast for

2 Miles WSW Bethel Island CA

  • Tonight

    Tonight: Patchy dense fog.  Otherwise, mostly cloudy, with a low around 41. Light and variable wind.

    Low: 41 °F

    Patchy Dense
    Fog

  • M.L.King Day

    M.L.King Day: Patchy fog before noon.  Otherwise, mostly sunny, with a high near 57. North northeast wind 3 to 5 mph.

    High: 57 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 10pm.  Otherwise, increasing clouds, with a low around 42. Light and variable wind.

    Low: 42 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 11am.  Otherwise, partly sunny, with a high near 59. North northeast wind around 5 mph.

    High: 59 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

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

    Low: 44 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 10am.  Otherwise, mostly cloudy, with a high near 58.

    High: 58 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 60.

    High: 60 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 9pm.  Otherwise, partly cloudy, with a low around 45.

    Low: 45 °F

    Patchy Fog

Detailed Forecast

Tonight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 41. Light and variable wind.
M.L.King Day
Patchy fog before noon. Otherwise, mostly sunny, with a high near 57. North northeast wind 3 to 5 mph.
Monday Night
Patchy fog after 10pm. Otherwise, increasing clouds, with a low around 42. Light and variable wind.
Tuesday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 59. North northeast wind around 5 mph.
Tuesday Night
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 44. Calm wind.
Wednesday
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 58.
Wednesday Night
Mostly cloudy, with a low around 46.
Thursday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 60.
Thursday Night
Patchy fog after 9pm. Otherwise, partly cloudy, with a low around 45.
Friday
Patchy fog before noon. Otherwise, mostly sunny, with a high near 58.
Friday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Saturday
Patchy fog. Otherwise, partly sunny, with a high near 58.
Saturday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 44.
Sunday
Patchy fog. Otherwise, mostly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Bethel Island CA
 38.02°N 121.7°W (Elev. 3 ft)
12:26 pm PST Jan 18, 2026
8pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database