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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

32°F

0°C

Humidity 95%
Wind Speed W 3 MPH
Barometer 30.58 in (1035.56 mb)
Dewpoint 31°F (-1°C)
Visibility 7.00 mi
Last update 17 Jan 08:15 AM PST
Extended Forecast for

Prosser WA

Air Stagnation Advisory January 17, 08:40am until January 20, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 17, 08:40am until January 20, 04:00pm

    NOW until 4:00pm Tue

    Air Stagnation Advisory

  • Today

    High: 34 °F

    Areas
    Freezing Fog
    and Patchy
    Fog

  • Tonight

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

    Low: 25 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog

  • M.L.King Day

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

    High: 39 °F

    Areas
    Freezing Fog
    and Patchy
    Fog

  • Monday Night

    Monday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Today
Patchy fog after 10am. Areas of freezing fog before 1pm, then patchy freezing fog after 4pm. Otherwise, cloudy, with a high near 34. Calm wind.
Tonight
Patchy fog before 7pm. Patchy freezing fog. Otherwise, cloudy, with a low around 28. Calm wind.
Sunday
Areas of fog after 10am. Areas of freezing fog before 10am. Otherwise, mostly cloudy, with a high near 38. Calm wind.
Sunday Night
Patchy fog before 10pm. Patchy freezing fog. Otherwise, cloudy, with a low around 25. Calm wind.
M.L.King Day
Patchy fog between 10am and 1pm. Areas of freezing fog before 1pm. Otherwise, partly sunny, with a high near 39. Calm wind.
Monday Night
Partly cloudy, with a low around 24.
Tuesday
Partly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
Partly sunny, with a high near 41.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Partly sunny, with a high near 40.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
8:31 am PST Jan 17, 2026
Forecast Valid:
8am 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