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Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Current conditions at

Seattle, Seattle-Tacoma International Airport (KSEA)

Lat: 47.44472°NLon: 122.31361°WElev: 427.0ft.

Clear

72°F

22°C

Humidity 40%
Wind Speed WNW 10 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 06 Sep 04:00 PM PDT
Extended Forecast for

Des Moines WA

  • Tonight

    Tonight: Increasing clouds, with a low around 55. Calm wind becoming south around 5 mph after midnight.

    Low: 55 °F

    Increasing
    Clouds

  • Labor Day

    Labor Day: Cloudy, with a high near 72. South southwest wind 3 to 7 mph.

    High: 72 °F

    Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 75. Calm wind becoming north 5 to 8 mph in the afternoon.

    High: 75 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55. North northeast wind 3 to 8 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 55. Calm wind becoming south around 5 mph after midnight.
Labor Day
Cloudy, with a high near 72. South southwest wind 3 to 7 mph.
Monday Night
Mostly cloudy, with a low around 53. Calm wind.
Tuesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 75. Calm wind becoming north 5 to 8 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 55. North northeast wind 3 to 8 mph.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Partly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 70.
Friday Night
A slight chance of rain. Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
A slight chance of rain. Mostly clear, with a low around 54.
Sunday
A slight chance of rain. Mostly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Des Moines WA
 47.39°N 122.32°W (Elev. 75 ft)
Last Update:
3:20 pm PDT Sep 6, 2026
Forecast Valid:
4pm PDT Sep 6, 2026-6pm PDT Sep 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation