High-Impact and Far-Reaching Winter Storm Continues; Cold Expands and Persists

A major winter storm will shift its impacts into the Northeast U.S. with heavy snow through tonight while over the Mid-Atlantic, sleet and freezing rain will diminish. Extremely cold air behind the storm will prolong dangerous travel and infrastructure impacts. Sub-zero low temperatures are expected nearly every morning from the Northern Plains through the Ohio Valley and into the Northeast. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

20°F

-7°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 30.29 in (1025.74 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 26 Jan 02:15 AM PST
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 36. Light and variable wind.

    High: 36 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25. Light and variable wind.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 38. Northwest wind 3 to 6 mph.

    High: 38 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow after 10pm.  Mostly cloudy, with a low around 28. Northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Rain/Snow

  • Wednesday

    Wednesday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly after 4am.  Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 10am.  Mostly cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain.  Cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 22. Calm wind.
Monday
Mostly cloudy, with a high near 36. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 25. Light and variable wind.
Tuesday
Mostly cloudy, with a high near 38. Northwest wind 3 to 6 mph.
Tuesday Night
A slight chance of rain and snow after 10pm. Mostly cloudy, with a low around 28. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 43.
Wednesday Night
A 30 percent chance of rain, mainly after 4am. Mostly cloudy, with a low around 31.
Thursday
A 30 percent chance of rain, mainly before 10am. Mostly cloudy, with a high near 45.
Thursday Night
A 40 percent chance of rain. Cloudy, with a low around 35.
Friday
A chance of rain, mainly before 10am. Cloudy, with a high near 47.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 37.
Saturday
Mostly cloudy, with a high near 51.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 37.
Sunday
A slight chance of rain. Mostly cloudy, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
1:30 am PST Jan 26, 2026
2am PST Jan 26, 2026-6pm PST Feb 1, 2026
 
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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