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

Tracking Late Season Winter Storms; Unusual Early-Season Heat Wave in the Southwest

Heavy snow and high winds continue in the Great Lakes and Northeast. A moderate atmospheric river will continue to bring heavy precipitation to the Pacific Northwest and northern Rockies. A major winter storm will develop across the northern High Plains tonight into Saturday and rapidly strengthen as it moves into the Great Lakes on Sunday. Above-average temperatures expected in the Southwest. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Mist

34°F

1°C

Humidity 100%
Wind Speed SE 6 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 34°F (1°C)
Visibility 3.50 mi
Wind Chill29°F (-2°C)
Last update 14 Mar 02:35 AM PDT
Extended Forecast for

Mercer Island WA

  • Overnight

    Overnight: Rain likely, possibly mixed with snow showers. Mostly cloudy, with a low around 35. Calm wind. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain/Snow
    Likely

  • Saturday

    Saturday: A chance of rain and snow showers before 2pm, then a slight chance of rain showers after 3pm. Mostly sunny, with a high near 45. Light and variable wind. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 45 °F

    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely after 11am. Mostly cloudy, with a high near 48. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain. Low around 42. Light southeast wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain then
    Rain Likely

  • Monday

    Monday: Rain. High near 54. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Rain

  • Monday Night

    Monday Night: Rain. Low around 47. Chance of precipitation is 80%.

    Low: 47 °F

    Rain

  • Tuesday

    Tuesday: Rain. Cloudy, with a high near 55.

    High: 55 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Cloudy, with a low around 50.

    Low: 50 °F

    Rain

Detailed Forecast

Overnight
Rain likely, possibly mixed with snow showers. Mostly cloudy, with a low around 35. Calm wind. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday
A chance of rain and snow showers before 2pm, then a slight chance of rain showers after 3pm. Mostly sunny, with a high near 45. Light and variable wind. Chance of precipitation is 30%. Little or no snow accumulation expected.
Saturday Night
Mostly cloudy, with a low around 32. Calm wind.
Sunday
Rain likely after 11am. Mostly cloudy, with a high near 48. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain. Low around 42. Light southeast wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain. High near 54. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Rain. Low around 47. Chance of precipitation is 80%.
Tuesday
Rain. Cloudy, with a high near 55.
Tuesday Night
Rain. Cloudy, with a low around 50.
Wednesday
Rain. Cloudy, with a high near 57.
Wednesday Night
Rain. Cloudy, with a low around 51.
Thursday
Rain. Cloudy, with a high near 60.
Thursday Night
Rain likely. Mostly cloudy, with a low around 50.
Friday
Rain likely. Mostly cloudy, with a high near 61.
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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:
2:25 am PDT Mar 14, 2026
Forecast Valid:
2am PDT Mar 14, 2026-6pm PDT Mar 20, 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