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Severe Thunderstorms and Heavy Rainfall; Typhoon Watch in Guam and CNMI

Heavy to excessive rainfall will continue through tonight from the Texas Big Bend region into southern Oklahoma. Scattered damaging wind gusts and a few tornadoes may accompany a line of severe thunderstorms that is expected across the Mid-Atlantic into New England Friday. A Typhoon Watch continues for Guam and CNMI as Tropical Storm Champi will strengthen and approach the islands this weekend. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Clear

55°F

13°C

Humidity 82%
Wind Speed N 0 MPH
Barometer 30.26 in (1024.72 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 15 Oct 09:15 PM PDT
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Mostly clear, with a low around 52. Light and variable wind.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 74. Light and variable wind.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of rain after 2am. Increasing clouds, with a low around 56. Light south southwest wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 21 mph.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: Rain likely, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 63. South southwest wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Rain Likely
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. Northeast wind 3 to 5 mph.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Monday

    Monday: Cloudy, with a high near 58.

    High: 58 °F

    Cloudy

  • Monday Night

    Monday Night: A slight chance of rain before 11pm. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Slight Chance
    Rain then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 52. Light and variable wind.
Friday
Mostly sunny, with a high near 74. Light and variable wind.
Friday Night
A 50 percent chance of rain after 2am. Increasing clouds, with a low around 56. Light south southwest wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 21 mph.
Saturday
Rain likely, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 63. South southwest wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Partly cloudy, with a low around 45. Northeast wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 59.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Cloudy, with a high near 58.
Monday Night
A slight chance of rain before 11pm. Mostly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 59.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 48.
Thursday
A chance of rain. Mostly cloudy, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.58°N 122.22°W (Elev. 118 ft)
Last Update:
1:20 pm PDT Oct 15, 2026
Forecast Valid:
9pm PDT Oct 15, 2026-6pm PDT Oct 22, 2026
 
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Additional Resources

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation