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Tracking Winter Weather and Frigid Temperatures This Weekend

Another clipper will drop into the Northern Plains and Upper Midwest into Sunday with snow and gusty winds contributing to some areas of blizzard conditions and snow squalls. Impactful snowfall will occur up and down the East Coast Sunday extending from the western Florida Panhandle to Maine. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

31°F

-1°C

Humidity 90%
Wind Speed N 0 MPH
Barometer 30.54 in (1034.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 18 Jan 07:35 AM PST
Extended Forecast for

Prosser WA

Air Stagnation Advisory January 18, 07:35am until January 20, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 18, 07:35am until January 20, 04:00pm

    NOW until 4:00pm Tue

    Air Stagnation Advisory

  • Today

    High: 38 °F

    Patchy
    Freezing Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Patchy freezing fog after 1am. Cloudy, with a low around 25. Light east wind.

    Low: 25 °F

    Mostly Cloudy
    then Patchy
    Freezing Fog

  • M.L.King Day

    M.L.King Day: Patchy freezing fog before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 39. Light northeast wind.

    High: 39 °F

    Patchy
    Freezing Fog
    then Mostly
    Sunny

  • Monday Night

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

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 39. North wind 3 to 5 mph.

    High: 39 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Patchy freezing fog after 1am. Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy
    then Patchy
    Freezing Fog

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Wednesday Night

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

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Today
Patchy freezing fog before 10am. Mostly cloudy, with a high near 38. Light and variable wind.
Tonight
Patchy freezing fog after 1am. Cloudy, with a low around 25. Light east wind.
M.L.King Day
Patchy freezing fog before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 39. Light northeast wind.
Monday Night
Partly cloudy, with a low around 25. Calm wind.
Tuesday
Partly sunny, with a high near 39. North wind 3 to 5 mph.
Tuesday Night
Patchy freezing fog after 1am. Partly cloudy, with a low around 25.
Wednesday
Mostly cloudy, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
Partly sunny, with a high near 41.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
A chance of rain and snow. Partly sunny, with a high near 44.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 23.
Saturday
A slight chance of rain and snow. Partly sunny, with a high near 38.
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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:
4:21 am PST Jan 18, 2026
Forecast Valid:
7am PST Jan 18, 2026-6pm PST Jan 24, 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