Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

32°F

0°C

Humidity 75%
Wind Speed N 0 MPH
Barometer 30.44 in (1030.82 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 21 Jan 07:35 AM PST
Extended Forecast for

Prosser WA

  • Today

    Today: Cloudy, with a high near 34. Light and variable wind becoming north around 5 mph in the afternoon.

    High: 34 °F

    Cloudy

  • Tonight

    Tonight: Cloudy, with a low around 24. Light southwest wind.

    Low: 24 °F

    Cloudy

  • Thursday

    Thursday: Cloudy, with a high near 35. North wind 3 to 5 mph.

    High: 35 °F

    Cloudy

  • Thursday Night

    Thursday Night: Cloudy, then gradually becoming partly cloudy, with a low around 23. Northwest wind 3 to 5 mph.

    Low: 23 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 37. North wind 6 to 8 mph.

    High: 37 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 35.

    High: 35 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

Detailed Forecast

Today
Cloudy, with a high near 34. Light and variable wind becoming north around 5 mph in the afternoon.
Tonight
Cloudy, with a low around 24. Light southwest wind.
Thursday
Cloudy, with a high near 35. North wind 3 to 5 mph.
Thursday Night
Cloudy, then gradually becoming partly cloudy, with a low around 23. Northwest wind 3 to 5 mph.
Friday
Sunny, with a high near 37. North wind 6 to 8 mph.
Friday Night
Mostly clear, with a low around 21.
Saturday
Sunny, with a high near 35.
Saturday Night
Partly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Partly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 38.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 41.
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
5:41 am PST Jan 21, 2026
7am PST Jan 21, 2026-6pm PST Jan 27, 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