Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

32°F

0°C

Humidity 86%
Wind Speed W 5 MPH
Barometer 30.56 in (1034.88 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 18 Jan 07:55 PM PST
Extended Forecast for

Prosser WA

Air Stagnation Advisory January 18, 08:12pm until January 20, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 18, 08:12pm until January 20, 04:00pm

    NOW until 4:00pm Tue

    Air Stagnation Advisory

  • Tonight

    Low: 26 °F

    Cloudy then
    Patchy
    Freezing Fog

  • M.L.King Day

    M.L.King Day: Areas of freezing fog before 10am. Mostly cloudy, with a high near 39. Calm wind.

    High: 39 °F

    Areas
    Freezing Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: Patchy freezing fog after 10pm. Mostly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Patchy
    Freezing Fog

  • Tuesday

    Tuesday: Partly sunny, with a high near 39. Light north wind.

    High: 39 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Patchy freezing fog after 1am. Partly cloudy, with a low around 24. Calm wind.

    Low: 24 °F

    Partly Cloudy
    then Patchy
    Freezing Fog

  • Wednesday

    Wednesday: Patchy freezing fog before 10am. Partly sunny, with a high near 38.

    High: 38 °F

    Patchy
    Freezing Fog
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy freezing fog after 10pm. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Patchy
    Freezing Fog

  • Thursday

    Thursday: Patchy freezing fog before 10am. Partly sunny, with a high near 39.

    High: 39 °F

    Patchy
    Freezing Fog
    then Partly
    Sunny

Detailed Forecast

Tonight
Patchy freezing fog after 1am. Cloudy, with a low around 26. Calm wind.
M.L.King Day
Areas of freezing fog before 10am. Mostly cloudy, with a high near 39. Calm wind.
Monday Night
Patchy freezing fog after 10pm. Mostly cloudy, with a low around 24. Calm wind.
Tuesday
Partly sunny, with a high near 39. Light north wind.
Tuesday Night
Patchy freezing fog after 1am. Partly cloudy, with a low around 24. Calm wind.
Wednesday
Patchy freezing fog before 10am. Partly sunny, with a high near 38.
Wednesday Night
Patchy freezing fog after 10pm. Mostly cloudy, with a low around 24.
Thursday
Patchy freezing fog before 10am. Partly sunny, with a high near 39.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Partly sunny, with a high near 41.
Friday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 27.
Saturday
A slight chance of rain and snow. Snow level 1800 feet. Partly sunny, with a high near 40.
Saturday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 25.
Sunday
A slight chance of rain and snow. Partly sunny, with a high near 41.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
3:20 pm PST Jan 18, 2026
8pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database