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

36°F

2°C

Humidity 71%
Wind Speed ESE 9 MPH
Barometer 30.22 in (1023.37 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 27 Dec 11:15 AM PST
Extended Forecast for

11 Miles SSW Mattawa WA

  • Today

    Today: Sunny, with a high near 32. North wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 32 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 27. North wind around 6 mph becoming southwest after midnight.

    Low: 27 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly sunny, with a high near 28. North wind around 6 mph becoming light and variable  in the afternoon.

    High: 28 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 23. North wind 3 to 5 mph.

    Low: 23 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 29. Northwest wind 3 to 6 mph.

    High: 29 °F

    Partly Sunny

  • Monday Night

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

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

  • Tuesday Night

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

    Low: 25 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 32. North wind 8 to 13 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 27. North wind around 6 mph becoming southwest after midnight.
Sunday
Mostly sunny, with a high near 28. North wind around 6 mph becoming light and variable in the afternoon.
Sunday Night
Mostly cloudy, with a low around 23. North wind 3 to 5 mph.
Monday
Partly sunny, with a high near 29. Northwest wind 3 to 6 mph.
Monday Night
Mostly cloudy, with a low around 24.
Tuesday
Partly sunny, with a high near 30.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
Partly sunny, with a high near 30.
Wednesday Night
Mostly cloudy, with a low around 27.
New Year's Day
Mostly cloudy, with a high near 32.
Thursday Night
A slight chance of snow. Mostly cloudy, with a low around 28.
Friday
A slight chance of snow. Mostly cloudy, with a high near 36.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Mattawa WA
 46.59°N 119.98°W (Elev. 3100 ft)
9:16 am PST Dec 27, 2025
11am 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