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

32°F

0°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 30.35 in (1027.77 mb)
Dewpoint 30°F (-1°C)
Visibility 8.00 mi
Last update 19 Jan 03:35 AM PST
Extended Forecast for

Mercer Island WA

  • Overnight

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

    Low: 36 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Patchy dense fog before 9am.  Otherwise, sunny, with a high near 52. Calm wind.

    High: 52 °F

    Patchy Dense
    Fog then
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. Calm wind.

    High: 50 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 36. Calm wind.
M.L.King Day
Patchy dense fog before 9am. Otherwise, sunny, with a high near 52. Calm wind.
Monday Night
Mostly cloudy, with a low around 35. Calm wind.
Tuesday
Partly sunny, with a high near 50. Calm wind.
Tuesday Night
Partly cloudy, with a low around 35. Calm wind.
Wednesday
Mostly sunny, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
Partly sunny, with a high near 47.
Thursday Night
Partly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 48.
Friday Night
A chance of rain. Partly cloudy, with a low around 36.
Saturday
A chance of rain and snow. Partly sunny, with a high near 48.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 38.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.6°N 122.22°W (Elev. 3 ft)
1:25 am PST Jan 19, 2026
3am PST Jan 19, 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