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Tracking Winter Weather and Frigid Temperatures Through This Weekend

A clipper storm will move across the Great Lakes through this weekend with periods of light snow, gusty winds, and lake effect snow bands which could make for hazardous travel at times. A frigid airmass will spread eastward behind this storm into the Midwest and Eastern U.S. through the weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

33°F

1°C

Humidity 90%
Wind Speed WSW 4 MPH
Barometer 30.57 in (1035.22 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 17 Jan 12:55 PM PST
Extended Forecast for

11 Miles SSW Mattawa WA

Air Stagnation Advisory January 17, 01:15pm until January 20, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 17, 01:15pm until January 20, 04:00pm

    NOW until 4:00pm Tue

    Air Stagnation Advisory

  • This Afternoon

    High: 32 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. North wind around 6 mph.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 35. North wind around 6 mph.

    High: 35 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 26. Northwest wind around 6 mph.

    Low: 26 °F

    Mostly Cloudy

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 34. North wind 3 to 5 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 32. Northeast wind around 5 mph.
Tonight
Mostly cloudy, with a low around 29. North wind around 6 mph.
Sunday
Partly sunny, with a high near 35. North wind around 6 mph.
Sunday Night
Mostly cloudy, with a low around 26. Northwest wind around 6 mph.
M.L.King Day
Mostly sunny, with a high near 34. North wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 26.
Tuesday
Partly sunny, with a high near 34.
Tuesday Night
Partly cloudy, with a low around 27.
Wednesday
Partly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Partly sunny, with a high near 35.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Mattawa WA
 46.59°N 119.98°W (Elev. 3100 ft)
Last Update:
1:07 pm PST Jan 17, 2026
Forecast Valid:
1pm PST Jan 17, 2026-6pm PST Jan 23, 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