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Tracking Winter Weather and Frigid Temperatures Through This Weekend

A clipper storm will move across the Great Lakes through this weekend with periods of light snow, gusty winds, and lake effect snow bands which could make for hazardous travel at times. A frigid airmass will spread eastward behind this storm into the Midwest and Eastern U.S. through the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

33°F

1°C

Humidity 91%
Wind Speed W 5 MPH
Barometer 30.53 in (1033.86 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 17 Jan 02:35 PM PST
Extended Forecast for

Prosser WA

Air Stagnation Advisory January 17, 02:51pm until January 20, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 17, 02:51pm until January 20, 04:00pm

    NOW until 4:00pm Tue

    Air Stagnation Advisory

  • This Afternoon

    High: 36 °F

    Patchy
    Freezing Fog
    and Areas Fog

  • Tonight

    Tonight: Patchy fog before 7pm. Patchy freezing fog. Otherwise, cloudy, with a low around 28. Light west wind.

    Low: 28 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog

  • Sunday

    Sunday: Areas of fog after 10am. Areas of freezing fog before 10am. Otherwise, mostly cloudy, with a high near 38. Light and variable wind.

    High: 38 °F

    Areas
    Freezing Fog
    and Areas Fog

  • Sunday Night

    Sunday Night: Patchy fog before 10pm. Patchy freezing fog. Otherwise, cloudy, with a low around 25. Light north wind.

    Low: 25 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog

  • M.L.King Day

    M.L.King Day: Areas of fog between 10am and 1pm. Areas of freezing fog before 10am. Otherwise, partly sunny, with a high near 39. Calm wind.

    High: 39 °F

    Areas
    Freezing Fog
    and Areas Fog

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Areas of fog. Patchy freezing fog after 4pm. Otherwise, cloudy, with a high near 36. North wind around 5 mph.
Tonight
Patchy fog before 7pm. Patchy freezing fog. Otherwise, cloudy, with a low around 28. Light west wind.
Sunday
Areas of fog after 10am. Areas of freezing fog before 10am. Otherwise, mostly cloudy, with a high near 38. Light and variable wind.
Sunday Night
Patchy fog before 10pm. Patchy freezing fog. Otherwise, cloudy, with a low around 25. Light north wind.
M.L.King Day
Areas of fog between 10am and 1pm. Areas of freezing fog before 10am. Otherwise, partly sunny, with a high near 39. Calm wind.
Monday Night
Partly cloudy, with a low around 25.
Tuesday
Partly sunny, with a high near 40.
Tuesday Night
Partly cloudy, with a low around 26.
Wednesday
Partly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Partly sunny, with a high near 41.
Thursday Night
A slight chance of rain. Mostly cloudy, with a low around 29.
Friday
A slight chance of rain and snow. Partly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
2:45 pm PST Jan 17, 2026
Forecast Valid:
2pm PST Jan 17, 2026-6pm PST Jan 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