Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Clear

75°F

24°C

Humidity 50%
Wind Speed NW 4 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 17 Aug 07:15 PM PDT
Extended Forecast for

Mercer Island WASimilar City Names

  • Tonight

    Tonight: Increasing clouds, with a low around 59. Light and variable wind.

    Low: 59 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 79. Light and variable wind becoming south around 5 mph.

    High: 79 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 59. Calm wind becoming southwest around 5 mph after midnight.

    Low: 59 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 78. Light south southwest wind.

    High: 78 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58. Light north wind.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 59. Light and variable wind.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 79. Light and variable wind becoming south around 5 mph.
Tuesday Night
Increasing clouds, with a low around 59. Calm wind becoming southwest around 5 mph after midnight.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 78. Light south southwest wind.
Wednesday Night
Partly cloudy, with a low around 58. Light north wind.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Partly sunny, with a high near 79.
Friday Night
Mostly cloudy, with a low around 59.
Saturday
A slight chance of rain. Mostly cloudy, with a high near 73.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 58.
Sunday
Mostly cloudy, with a high near 75.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WASimilar City Names
 47.58°N 122.22°W (Elev. 118 ft)
11:26 am PDT Aug 17, 2026
7pm PDT Aug 17, 2026-6pm PDT Aug 24, 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