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

Severe Thunderstorm and Flash Flood Threats Continue into the Weekend

Severe thunderstorms are expected from the southern Plains to the Midwest through Friday night. Severe storm hazards may include large hail, severe winds, and tornadoes, some of which may be strong. There will be another chance for severe thunderstorms on Saturday for portions of Texas, the Lower Mississippi Valley, and the Ohio Valley. Storms could result in locally heavy rain and flash flooding. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Rain

48°F

9°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.24 in (1024.04 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 06 Mar 11:15 PM PST
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 46. South wind around 6 mph.

    Low: 46 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 68. Southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 68 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. Southwest wind 7 to 9 mph.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 63. Southwest wind 10 to 20 mph, with gusts as high as 29 mph.

    High: 63 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33. West wind 8 to 13 mph, with gusts as high as 23 mph.

    Low: 33 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 10 percent chance of rain after 4pm. Snow level rising to 1500 feet in the afternoon. Partly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

    Low: 33 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 46. South wind around 6 mph.
Saturday
Partly sunny, with a high near 68. Southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 45. Southwest wind 7 to 9 mph.
Sunday
Partly sunny, with a high near 63. Southwest wind 10 to 20 mph, with gusts as high as 29 mph.
Sunday Night
Partly cloudy, with a low around 33. West wind 8 to 13 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 29.
Tuesday
A 10 percent chance of rain after 4pm. Snow level rising to 1500 feet in the afternoon. Partly sunny, with a high near 50.
Tuesday Night
A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Wednesday
A chance of rain and snow before 10am, then a chance of rain. Mostly cloudy, with a high near 56.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 42.
Thursday
A chance of rain. Mostly cloudy, with a high near 58.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 35.
Friday
A chance of rain and snow. Partly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
10:35 pm PST Mar 6, 2026
Forecast Valid:
11pm PST Mar 6, 2026-6pm PDT Mar 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