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Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

Boeing Field - King County International Airport (KBFI)

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

Overcast

48°F

9°C

Humidity 87%
Wind Speed S 8 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 45°F (7°C)
Visibility 8.00 mi
Wind Chill44°F (7°C)
Last update 13 Apr 03:35 AM PDT
Extended Forecast for

Mercer Island WA

  • Overnight

    Overnight: Rain likely. Cloudy, with a steady temperature around 50. South wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 7am. Mostly cloudy, with a high near 55. Southwest wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Rain Likely
    then Chance
    Rain

  • Monday Night

    Monday Night: A 50 percent chance of rain after 4am. Mostly cloudy, with a low around 46. South wind around 8 mph.

    Low: 46 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain. High near 51. South wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 40. South wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Rain then
    Rain Likely

  • Wednesday

    Wednesday: Rain, mainly between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 52. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 52 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain likely before 11pm. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain likely. Cloudy, with a steady temperature around 50. South wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely, mainly before 7am. Mostly cloudy, with a high near 55. Southwest wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A 50 percent chance of rain after 4am. Mostly cloudy, with a low around 46. South wind around 8 mph.
Tuesday
Rain. High near 51. South wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain. Low around 40. South wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain, mainly between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 52. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain likely before 11pm. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Partly sunny, with a high near 58.
Friday Night
Mostly cloudy, with a low around 42.
Saturday
Mostly cloudy, with a high near 62.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 46.
Sunday
A chance of rain. 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:
11:27 pm PDT Apr 12, 2026
Forecast Valid:
3am PDT Apr 13, 2026-6pm PDT Apr 19, 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