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

Pacific Storm System Moves Inland; Strong Storm in Alaska

A Pacific storm system will bring low elevation/valley rain and mountain snow as it moves inland to the central Great Basin through the central Rockies through Thursday. Scattered thunderstorms are likely from California into the Great Basin. A large low pressure system continues to bring snow, blizzard conditions, damaging winds, and mixed precipitation along the Bering Sea and Southwest Alaska. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

27°F

-3°C

Humidity 94%
Wind Speed N 0 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 11 Feb 07:35 AM PST
Extended Forecast for

Prosser WA

  • Today

    Today: Sunny, with a high near 50. West wind around 5 mph becoming northwest in the afternoon.

    High: 50 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 48. Calm wind becoming south around 5 mph in the afternoon.

    High: 48 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 32. Light and variable wind.

    Low: 32 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, with a high near 47. South wind 3 to 6 mph.

    High: 47 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A slight chance of rain between 10pm and 4am. Mostly cloudy, with a low around 36. Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A 30 percent chance of rain after 10am. Cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain, mainly before 4am. Cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

  • Sunday

    Sunday: A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 47.

    High: 47 °F

    Slight Chance
    Rain then
    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 50. West wind around 5 mph becoming northwest in the afternoon.
Tonight
Partly cloudy, with a low around 31. Calm wind.
Thursday
Mostly cloudy, with a high near 48. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Increasing clouds, with a low around 32. Light and variable wind.
Friday
Mostly cloudy, with a high near 47. South wind 3 to 6 mph.
Friday Night
A slight chance of rain between 10pm and 4am. Mostly cloudy, with a low around 36. Chance of precipitation is 20%.
Saturday
A 30 percent chance of rain after 10am. Cloudy, with a high near 47.
Saturday Night
A 40 percent chance of rain, mainly before 4am. Cloudy, with a low around 35.
Sunday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 47.
Sunday Night
A slight chance of rain after 10pm, mixing with snow after 1am. Mostly cloudy, with a low around 33.
Washington's Birthday
A slight chance of rain and snow. Mostly cloudy, with a high near 46.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 33.
Tuesday
A chance of rain and snow. Snow level 1900 feet. Mostly cloudy, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
4:20 am PST Feb 11, 2026
Forecast Valid:
7am PST Feb 11, 2026-6pm PST Feb 17, 2026
 
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Additional Resources

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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