Threats of Heavy Rainfall, Severe Thunderstorms and Dangerous Heat

Several complexes of thunderstorms, some severe with heavy rainfall, will impact areas from the northern Plains, Great Lakes, Ohio Valley to the mid-Atlantic. This threat will shift toward the Carolinas on Friday. Heavy rainfall, remnants of Edouard, continues for portions of eastern Texas through today. In-between these systems, a dome of high pressure and heat for central and eastern states. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

70°F

21°C

Humidity 35%
Wind Speed N 0 MPH
Barometer 29.76 in (1007.79 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 03 Sep 04:35 PM PDT
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: A 10 percent chance of showers after 5am.  Mostly cloudy, with a low around 44. South wind around 5 mph becoming calm  in the evening.

    Low: 44 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 8am.  Partly sunny, then gradually becoming sunny, with a high near 73. Calm wind.

    High: 73 °F

    Slight Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers before 11am.  Mostly sunny, with a high near 73. Calm wind.

    High: 73 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46. Light and variable wind.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers.  Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

  • Labor Day

    Labor Day: A 30 percent chance of showers, mainly before 11am.  Partly sunny, with a high near 79.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

Detailed Forecast

Tonight
A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 44. South wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers before 8am. Partly sunny, then gradually becoming sunny, with a high near 73. Calm wind.
Friday Night
Partly cloudy, with a low around 44. Calm wind.
Saturday
A 40 percent chance of showers before 11am. Mostly sunny, with a high near 73. Calm wind.
Saturday Night
Partly cloudy, with a low around 46. Light and variable wind.
Sunday
Partly sunny, with a high near 77.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 48.
Labor Day
A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
2:57 pm PDT Sep 3, 2026
4pm PDT Sep 3, 2026-6pm PDT Sep 10, 2026
 
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Additional Resources

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