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

Boeing Field - King County International Airport (KBFI)

Lat: 47.54548°NLon: 122.3147°WElev: 20.0ft.

Clear

45°F

7°C

Humidity 73%
Wind Speed N 0 MPH
Barometer 30.31 in (1026.41 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 18 Jan 06:53 PM PST
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 51. Light north wind.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 49. Light north northeast wind.

    High: 49 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of rain before 4am, then a chance of rain and snow.  Mostly cloudy, with a low around 40.

    Low: 40 °F

    Slight Chance
    Rain then
    Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 36. Calm wind.
M.L.King Day
Sunny, with a high near 51. Light north wind.
Monday Night
Partly cloudy, with a low around 36. Calm wind.
Tuesday
Partly sunny, with a high near 49. Light north northeast wind.
Tuesday Night
Partly cloudy, with a low around 37. Calm wind.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
Mostly cloudy, with a low around 37.
Thursday
Mostly cloudy, with a high near 47.
Thursday Night
A slight chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 40.
Friday
A chance of rain and snow before 10am, then a chance of rain. Mostly cloudy, with a high near 47.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 39.
Saturday
A chance of rain and snow. Partly sunny, with a high near 46.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 40.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 48.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.25°W (Elev. 105 ft)
7:01 pm PST Jan 18, 2026
7pm PST Jan 18, 2026-6pm PST Jan 25, 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