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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

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Rain

53°F

12°C

Humidity 94%
Wind Speed N 0 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 51°F (11°C)
Visibility 5.00 mi
Last update 06 Sep 09:15 AM PDT
Extended Forecast for

4 Miles E Prosser WA

  • Today

    Today: A 40 percent chance of showers, mainly before 2pm. Mostly cloudy, with a high near 70. West wind 5 to 8 mph.

    High: 70 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. West wind around 6 mph.

    Low: 48 °F

    Mostly Cloudy

  • Labor Day

    Labor Day: Sunny, then becoming partly sunny during the afternoon, with a high near 73. West wind 5 to 7 mph.

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 47. Southwest wind around 5 mph becoming calm in the evening.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 75. Calm wind.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 50.

    Low: 50 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Today
A 40 percent chance of showers, mainly before 2pm. Mostly cloudy, with a high near 70. West wind 5 to 8 mph.
Tonight
Mostly cloudy, with a low around 48. West wind around 6 mph.
Labor Day
Sunny, then becoming partly sunny during the afternoon, with a high near 73. West wind 5 to 7 mph.
Monday Night
Partly cloudy, with a low around 47. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 75. Calm wind.
Tuesday Night
Clear, with a low around 50.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 84.
Thursday Night
Partly cloudy, with a low around 51.
Friday
Sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Prosser WA
 46.21°N 119.69°W (Elev. 1598 ft)
Last Update:
8:57 am PDT Sep 6, 2026
Forecast Valid:
9am PDT Sep 6, 2026-6pm PDT Sep 12, 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