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 88%
Wind Speed N 0 MPH
Barometer 30.6 in (1036.24 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 19 Jan 01:35 AM PST
Extended Forecast for

5 Miles SSW Toppenish WA

Air Stagnation Advisory January 19, 01:57am until January 20, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 19, 01:57am until January 20, 04:00pm

    NOW until 4:00pm Tue

    Air Stagnation Advisory

  • Overnight

    Low: 24 °F

    Cloudy

  • M.L.King Day

    M.L.King Day: Mostly cloudy, with a high near 39. Calm wind.

    High: 39 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 38. Calm wind.

    High: 38 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

Detailed Forecast

Overnight
Cloudy, with a low around 24. Calm wind.
M.L.King Day
Mostly cloudy, with a high near 39. Calm wind.
Monday Night
Mostly cloudy, with a low around 23. Calm wind.
Tuesday
Partly sunny, with a high near 38. Calm wind.
Tuesday Night
Partly cloudy, with a low around 22. Calm wind.
Wednesday
Mostly sunny, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 23.
Friday
Mostly sunny, with a high near 39.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 40.
Saturday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 27.
Sunday
A slight chance of rain and snow. Mostly cloudy, with a high near 42.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Toppenish WA
 46.3°N 120.34°W (Elev. 778 ft)
1:31 am PST Jan 19, 2026
1am PST Jan 19, 2026-6pm PST Jan 25, 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