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

Critical Fire Weather in the Plains; Severe Thunderstorms in the Upper Mississippi Valley and Great Lakes

Anomalously warm, dry and breezy conditions will bring elevated to critical fire weather conditions across portions of the Intermountain West into the central and southern Plains today. Strong to severe thunderstorms are possible across portions of the upper Mississippi River Valley to the Great Lakes tonight through the day Tuesday. Damaging gusts, hail, and heavy rainfall are likely. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Clear

50°F

10°C

Humidity 43%
Wind Speed NW 9 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 30 Mar 05:00 PM PDT
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Increasing clouds, with a low around 37. North wind 5 to 7 mph becoming calm in the evening.

    Low: 37 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 58. Light and variable wind.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain after 11pm. Mostly cloudy, with a low around 43. South wind 3 to 5 mph.

    Low: 43 °F

    Chance Rain

  • Wednesday

    Wednesday: Rain. High near 52. South wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain. Low around 41. South southwest wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 41 °F

    Rain then
    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before 11am. Mostly cloudy, with a high near 54. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 37. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 58. Light and variable wind.
Tuesday Night
A 30 percent chance of rain after 11pm. Mostly cloudy, with a low around 43. South wind 3 to 5 mph.
Wednesday
Rain. High near 52. South wind 3 to 7 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain. Low around 41. South southwest wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Rain likely, mainly before 11am. Mostly cloudy, with a high near 54. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly cloudy, with a low around 42.
Friday
Partly sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 61.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 61.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
A slight chance of rain. Partly sunny, with a high near 63.
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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:
11:27 am PDT Mar 30, 2026
Forecast Valid:
5pm PDT Mar 30, 2026-6pm PDT Apr 6, 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