Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

29°F

-2°C

Humidity 85%
Wind Speed N 0 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 27 Dec 07:15 AM PST
Extended Forecast for

11 Miles SE Mattawa WA

  • Today

    Today: Sunny, with a high near 40. West wind 6 to 9 mph becoming northeast in the afternoon.

    High: 40 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Light east wind.

    Low: 24 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 36. Light northeast wind.

    High: 36 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 25. Light northwest wind.

    Low: 25 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 37. Northwest wind 3 to 5 mph.

    High: 37 °F

    Partly Sunny

  • Monday Night

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

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 37.

    High: 37 °F

    Mostly Cloudy

  • Tuesday Night

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

    Low: 25 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 40. West wind 6 to 9 mph becoming northeast in the afternoon.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Light east wind.
Sunday
Mostly sunny, with a high near 36. Light northeast wind.
Sunday Night
Mostly cloudy, with a low around 25. Light northwest wind.
Monday
Partly sunny, with a high near 37. Northwest wind 3 to 5 mph.
Monday Night
Mostly cloudy, with a low around 24.
Tuesday
Mostly cloudy, with a high near 37.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
Partly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 27.
New Year's Day
Cloudy, with a high near 39.
Thursday Night
A slight chance of rain. Mostly cloudy, with a low around 29.
Friday
A slight chance of rain. Mostly cloudy, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SE Mattawa WA
 46.64°N 119.74°W (Elev. 400 ft)
6:56 am PST Dec 27, 2025
7am PST Dec 27, 2025-6pm PST Jan 2, 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