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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

54°F

12°C

Humidity 47%
Wind Speed N 0 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 11 Feb 02:55 PM PST
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: Mostly clear, with a low around 32. Light and variable wind.

    Low: 32 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 48. Calm wind becoming south around 5 mph in the morning.

    High: 48 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Cloudy during the early evening, then gradual clearing, with a low around 31. Light and variable wind.

    Low: 31 °F

    Gradual
    Clearing

  • Friday

    Friday: Mostly cloudy, with a high near 49. Southwest wind 3 to 6 mph.

    High: 49 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 37. Southwest wind around 6 mph.

    Low: 37 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of rain after 10am. Mostly cloudy, with a high near 49.

    High: 49 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: A 40 percent chance of rain, mainly before 4am. Cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

  • Sunday

    Sunday: A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 48.

    High: 48 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Light and variable wind.
Thursday
Increasing clouds, with a high near 48. Calm wind becoming south around 5 mph in the morning.
Thursday Night
Cloudy during the early evening, then gradual clearing, with a low around 31. Light and variable wind.
Friday
Mostly cloudy, with a high near 49. Southwest wind 3 to 6 mph.
Friday Night
A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 37. Southwest wind around 6 mph.
Saturday
A 20 percent chance of rain after 10am. Mostly cloudy, with a high near 49.
Saturday Night
A 40 percent chance of rain, mainly before 4am. Cloudy, with a low around 36.
Sunday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 48.
Sunday Night
Mostly cloudy, with a low around 34.
Washington's Birthday
A slight chance of rain and snow between 10am and 1pm, then a slight chance of rain after 1pm. Mostly cloudy, with a high near 47.
Monday Night
A chance of rain. Partly cloudy, with a low around 34.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 49.
Tuesday Night
A chance of rain and snow. Partly cloudy, with a low around 33.
Wednesday
A chance of rain and snow. Snow level 1500 feet rising to 2100 feet in the afternoon. Partly sunny, with a high near 50.
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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:
3:20 pm PST Feb 11, 2026
Forecast Valid:
3pm PST Feb 11, 2026-6pm PST Feb 18, 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