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

Extremely Critical Fire Weather in the Central Plains; Active Pattern in the West

Gusty to high winds and low relative humidity will bring critical to extremely critical fire weather conditions to the central and southern Plains today into Wednesday. Use caution with any potential ignition sources. Two Pacific storms will impact the western U.S. into Wednesday with gusty winds, low elevation rain and heavy mountain snow. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Mostly Cloudy

34°F

1°C

Humidity 86%
Wind Speed N 0 MPH
Barometer 29.44 in (996.95 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 17 Feb 08:35 AM PST
Extended Forecast for

Prosser WA

  • Today

    Today: A 10 percent chance of showers after 4pm. Snow level 800 feet rising to 1500 feet. Mostly sunny, with a high near 46. Southwest wind 3 to 6 mph.

    High: 46 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: A chance of rain and snow showers before 1am, then a slight chance of snow showers between 1am and 4am. Snow level 1200 feet lowering to 600 feet after midnight . Mostly cloudy, with a low around 27. West wind around 6 mph. Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A slight chance of snow before 1pm, then a slight chance of rain and snow between 1pm and 4pm, then a slight chance of rain after 4pm. Mostly sunny, with a high near 45. West wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 45 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A slight 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 800 feet. Mostly cloudy, with a low around 25. Southwest wind around 6 mph becoming north after midnight. Chance of precipitation is 30%.

    Low: 25 °F

    Chance
    Rain/Snow

  • Thursday

    Thursday: A 30 percent chance of snow, mainly before 10am. Mostly cloudy, with a high near 41. North wind 6 to 9 mph.

    High: 41 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before 10pm. Partly cloudy, with a low around 25.

    Low: 25 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of snow after 10am, mixing with rain after 1pm. Snow level rising to 1200 feet in the afternoon. Mostly cloudy, with a high near 42. Chance of precipitation is 20%.

    High: 42 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

Detailed Forecast

Today
A 10 percent chance of showers after 4pm. Snow level 800 feet rising to 1500 feet. Mostly sunny, with a high near 46. Southwest wind 3 to 6 mph.
Tonight
A chance of rain and snow showers before 1am, then a slight chance of snow showers between 1am and 4am. Snow level 1200 feet lowering to 600 feet after midnight . Mostly cloudy, with a low around 27. West wind around 6 mph. Chance of precipitation is 30%.
Wednesday
A slight chance of snow before 1pm, then a slight chance of rain and snow between 1pm and 4pm, then a slight chance of rain after 4pm. Mostly sunny, with a high near 45. West wind 5 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
A slight 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 800 feet. Mostly cloudy, with a low around 25. Southwest wind around 6 mph becoming north after midnight. Chance of precipitation is 30%.
Thursday
A 30 percent chance of snow, mainly before 10am. Mostly cloudy, with a high near 41. North wind 6 to 9 mph.
Thursday Night
A 20 percent chance of snow before 10pm. Partly cloudy, with a low around 25.
Friday
Mostly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 27.
Saturday
A slight chance of snow after 10am, mixing with rain after 1pm. Snow level rising to 1200 feet in the afternoon. Mostly cloudy, with a high near 42. Chance of precipitation is 20%.
Saturday Night
A chance of rain before 1am, then a chance of rain and snow. Snow level 1800 feet. Mostly cloudy, with a low around 30.
Sunday
Rain and snow likely. Snow level 1400 feet rising to 2500 feet in the afternoon. Mostly cloudy, with a high near 45.
Sunday Night
Rain likely. Mostly cloudy, with a low around 33.
Monday
A chance of rain. Mostly cloudy, with a high near 49.
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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:
8:31 am PST Feb 17, 2026
Forecast Valid:
8am PST Feb 17, 2026-6pm PST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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