Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Mist

40°F

4°C

Humidity 100%
Wind Speed SW 4 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 40°F (4°C)
Visibility 4.00 mi
Wind Chill37°F (3°C)
Last update 01 Feb 08:35 AM PST
Extended Forecast for

11 Miles SSW Mattawa WA

  • Today

    Today: A 30 percent chance of rain before 1pm.  Cloudy through mid morning, then gradual clearing, with a high near 45. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 45 °F

    Chance Rain

  • Tonight

    Tonight: Increasing clouds, with a low around 34. West wind 9 to 11 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, with a high near 44. South wind 6 to 8 mph.

    High: 44 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. Northwest wind around 6 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 42. North wind around 7 mph.

    High: 42 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

Detailed Forecast

Today
A 30 percent chance of rain before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 45. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Tonight
Increasing clouds, with a low around 34. West wind 9 to 11 mph.
Monday
Partly sunny, with a high near 44. South wind 6 to 8 mph.
Monday Night
Mostly cloudy, with a low around 33. Northwest wind around 6 mph.
Tuesday
Partly sunny, with a high near 42. North wind around 7 mph.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 44.
Wednesday Night
Partly cloudy, with a low around 32.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 44.
Friday Night
Partly cloudy, with a low around 32.
Saturday
Partly sunny, with a high near 43.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Mattawa WA
 46.59°N 119.98°W (Elev. 3100 ft)
4:22 am PST Feb 1, 2026
8am PST Feb 1, 2026-6pm PST Feb 7, 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