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

Inclement Weather in the Pacific Northwest; Severe Thunderstorms in the Southeast; Impending Winter Storm

An approaching storm will bring rain and high elevation snow to Pacific Northwest through the weekend. Isolated severe thunderstorms are possible across parts of the Southeast today into this evening as a low strengthens over the Southeast. This system will form into a winter storm on Sunday that will bring heavy snow, high winds, and coastal flooding to the Mid-Atlantic and Northeast into Monday. 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 30.14 in (1020.66 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 21 Feb 07:35 AM PST
Extended Forecast for

Prosser WA

  • Today

    Today: A slight chance of snow before 10am, then a chance of rain and snow. Snow level rising to 2200 feet in the afternoon. Cloudy, with a high near 41. West wind 5 to 8 mph becoming north in the afternoon. Chance of precipitation is 40%.

    High: 41 °F

    Chance
    Rain/Snow

  • Tonight

    Tonight: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 29. West wind 5 to 7 mph.

    Low: 29 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: Rain, mainly after 4pm. High near 51. Northwest wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain. Low around 37. Northwest wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Rain

  • Monday

    Monday: Rain. High near 53. South wind 3 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Rain

  • Monday Night

    Monday Night: Rain. Low around 41. Chance of precipitation is 80%.

    Low: 41 °F

    Rain

  • Tuesday

    Tuesday: A 40 percent chance of rain, mainly before 4pm. Partly sunny, with a high near 55.

    High: 55 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 33.

    Low: 33 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of snow before 10am, then a chance of rain and snow. Snow level rising to 2200 feet in the afternoon. Cloudy, with a high near 41. West wind 5 to 8 mph becoming north in the afternoon. Chance of precipitation is 40%.
Tonight
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 29. West wind 5 to 7 mph.
Sunday
Rain, mainly after 4pm. High near 51. Northwest wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Rain. Low around 37. Northwest wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain. High near 53. South wind 3 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Rain. Low around 41. Chance of precipitation is 80%.
Tuesday
A 40 percent chance of rain, mainly before 4pm. Partly sunny, with a high near 55.
Tuesday Night
A 20 percent chance of rain before 10pm. Partly cloudy, with a low around 33.
Wednesday
Mostly sunny, with a high near 53.
Wednesday Night
Mostly clear, with a low around 33.
Thursday
A chance of rain. Mostly sunny, with a high near 54.
Thursday Night
A chance of rain. Partly cloudy, with a low around 37.
Friday
A chance of rain. Mostly sunny, with a high near 54.
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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:
5:51 am PST Feb 21, 2026
Forecast Valid:
7am PST Feb 21, 2026-6pm PST Feb 27, 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