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

Lake-Effect Snow through Friday; Strong Winds in the Northern and Central Plains

A clipper-like system will drop down from Canada on Thursday, bringing wintry weather from the Upper Midwest to the Great Lakes through Friday. This system is expected to bring strong northerly winds to much of the northern and central High Plains Thursday afternoon through Friday, with gusts up to 60 mph expected. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Overcast

50°F

10°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.54 in (1034.2 mb)
Dewpoint 46°F (8°C)
Visibility 9.00 mi
Last update 14 Jan 11:20 PM PST
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Patchy fog. Otherwise, mostly cloudy, with a steady temperature around 47. Light north wind.

    Low: 47 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy dense fog before 9am. Otherwise, partly sunny, with a steady temperature around 48. North wind 5 to 7 mph.

    High: 48 °F

    Patchy Dense
    Fog then
    Partly Sunny

  • Thursday Night

    Thursday Night: Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 39. North northeast wind 3 to 6 mph.

    Low: 39 °F

    Patchy Fog

  • Friday

    Friday: Sunny, with a high near 53. North northeast wind 3 to 5 mph.

    High: 53 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 38. Light northeast wind.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog. Otherwise, mostly cloudy, with a steady temperature around 47. Light north wind.
Thursday
Patchy dense fog before 9am. Otherwise, partly sunny, with a steady temperature around 48. North wind 5 to 7 mph.
Thursday Night
Patchy fog before 3am, then patchy fog after 4am. Otherwise, partly cloudy, with a low around 39. North northeast wind 3 to 6 mph.
Friday
Sunny, with a high near 53. North northeast wind 3 to 5 mph.
Friday Night
Mostly clear, with a low around 38. Light northeast wind.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 37.
M.L.King Day
Sunny, with a high near 51.
Monday Night
Patchy fog. Otherwise, partly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 38.
Wednesday
Patchy fog. Otherwise, mostly cloudy, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.6°N 122.22°W (Elev. 3 ft)
Last Update:
7:01 pm PST Jan 14, 2026
Forecast Valid:
11pm PST Jan 14, 2026-6pm PST Jan 21, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation