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

Heavy Rain and Flooding Concerns in Hawaii; Severe Weather this Weekend in the Plains; Pacific Storm in the West

A storm system near the Hawaiian Islands is expected to bring periods of heavy rainfall, strong winds, and isolated strong to severe thunderstorms through Friday. Several rounds of severe thunderstorms are forecast to impact parts of the Great Plains into the Midwest this weekend into next week. Moderate to heavy rainfall and high elevation snow is expected this weekend over California and Oregon. Read More >

Current conditions at

Renton Municipal Airport (KRNT)

Lat: 47.49509°NLon: 122.21437°WElev: 23.0ft.

Clear

55°F

13°C

Humidity 66%
Wind Speed NNW 9 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 09 Apr 11:20 PM PDT
Extended Forecast for

Mercer Island WA

  • Tonight

    Tonight: Partly cloudy, with a low around 44. Light north northeast wind.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: A 10 percent chance of showers after 5pm. Partly sunny, with a high near 69. Light and variable wind.

    High: 69 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers before 8pm, then a chance of showers after midnight. Mostly cloudy, with a low around 50. Light and variable wind. Chance of precipitation is 30%.

    Low: 50 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly before 11am. Cloudy, with a high near 58. South wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 48. South southwest wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 11am. Mostly cloudy, with a high near 61.

    High: 61 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 57.

    High: 57 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of rain. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Partly cloudy, with a low around 44. Light north northeast wind.
Friday
A 10 percent chance of showers after 5pm. Partly sunny, with a high near 69. Light and variable wind.
Friday Night
A slight chance of showers before 8pm, then a chance of showers after midnight. Mostly cloudy, with a low around 50. Light and variable wind. Chance of precipitation is 30%.
Saturday
Showers likely, mainly before 11am. Cloudy, with a high near 58. South wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 48. South southwest wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers after 11am. Mostly cloudy, with a high near 61.
Sunday Night
A 40 percent chance of showers, mainly before 11pm. Mostly cloudy, with a low around 47.
Monday
A chance of showers. Mostly cloudy, with a high near 57.
Monday Night
A slight chance of rain. Mostly cloudy, with a low around 45.
Tuesday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 51.
Tuesday Night
Rain. Mostly cloudy, with a low around 41.
Wednesday
A chance of rain. Partly sunny, with a high near 53.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 38.
Thursday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercer Island WA
 47.56°N 122.21°W (Elev. 121 ft)
Last Update:
11:26 pm PDT Apr 9, 2026
Forecast Valid:
11pm PDT Apr 9, 2026-6pm PDT Apr 16, 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