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

Critical Fire Weather in the High Plains; Heavy Snow in the Western Mountains and Northern Plains

Gusty winds and low relative humidity will bring critical fire weather to the central and southern High Plains Wednesday. Two Pacific storms will continue impacting the mountains of the western U.S. into Thursday with gusty winds and heavy snow. Heavy snow and gusty winds will continue to impact the northern Plains into the central Great Lakes Wednesday. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

34°F

1°C

Humidity 84%
Wind Speed WNW 3 MPH
Barometer 29.53 in (1000.0 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 17 Feb 08:55 PM PST
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm. Snow level 1600 feet lowering to 600 feet. Mostly cloudy, with a low around 28. West wind around 5 mph.

    Low: 28 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46. Southwest wind 6 to 9 mph.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain before 10pm, then a chance of rain and snow between 10pm and 1am, then a chance of snow after 1am. Snow level 1200 feet lowering to 600 feet after midnight . Mostly cloudy, with a low around 27. South wind around 6 mph becoming east after midnight. Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Rain/Snow

  • Thursday

    Thursday: A 30 percent chance of snow, mainly before 10am. Mostly cloudy, with a high near 42. North wind 6 to 9 mph.

    High: 42 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 25. West wind around 6 mph.

    Low: 25 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of snow between 10am and 1pm, then a slight chance of rain after 1pm. Snow level rising to 1200 feet in the afternoon. Mostly cloudy, with a high near 44. Chance of precipitation is 20%.

    High: 44 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A chance of rain before 4am, then a slight chance of rain and snow. Snow level 1800 feet. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.

    Low: 30 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
A 20 percent chance of rain before 10pm. Snow level 1600 feet lowering to 600 feet. Mostly cloudy, with a low around 28. West wind around 5 mph.
Wednesday
Mostly sunny, with a high near 46. Southwest wind 6 to 9 mph.
Wednesday Night
A chance of rain before 10pm, then a chance of rain and snow between 10pm and 1am, then a chance of snow after 1am. Snow level 1200 feet lowering to 600 feet after midnight . Mostly cloudy, with a low around 27. South wind around 6 mph becoming east after midnight. Chance of precipitation is 30%.
Thursday
A 30 percent chance of snow, mainly before 10am. Mostly cloudy, with a high near 42. North wind 6 to 9 mph.
Thursday Night
Partly cloudy, with a low around 25. West wind around 6 mph.
Friday
Mostly sunny, with a high near 44.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
A slight chance of snow between 10am and 1pm, then a slight chance of rain after 1pm. Snow level rising to 1200 feet in the afternoon. Mostly cloudy, with a high near 44. Chance of precipitation is 20%.
Saturday Night
A chance of rain before 4am, then a slight chance of rain and snow. Snow level 1800 feet. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Sunday
A slight chance of rain and snow before 10am, then a chance of rain. Snow level 1200 feet rising to 2300 feet in the afternoon. Mostly cloudy, with a high near 49.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 33.
Monday
A chance of rain. Mostly cloudy, with a high near 50.
Monday Night
A chance of rain. Mostly cloudy, with a low around 33.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
8:46 pm PST Feb 17, 2026
Forecast Valid:
9pm PST Feb 17, 2026-6pm PST Feb 24, 2026
 
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Additional Resources

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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