Tracking Late Season Winter Storms

A moderate atmospheric river will continue to bring heavy snow over the Olympics, northern Cascades and northern Rockies Friday while heavy rain may bring flooding to coastal Oregon and Washington. A winter storm will continue to push across the Great Lakes and Northeast U.S. Friday and Saturday with areas of heavy snow and high winds. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

23°F

-5°C

Humidity 87%
Wind Speed N 0 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 10 Mar 07:35 AM PDT
Extended Forecast for

11 Miles SSW Mattawa WA

  • Tonight

    Tonight: Rain and snow.  Snow level 3600 feet rising to 4700 feet after midnight. Low around 35. Breezy, with a west wind 19 to 29 mph decreasing to 7 to 17 mph. Winds could gust as high as 40 mph.  Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain/Snow and
    Breezy

  • Friday

    Friday: Rain and snow.  High near 43. West wind around 8 mph.  Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 43 °F

    Rain/Snow

  • Friday Night

    Friday Night: Rain likely, possibly mixed with snow before 2am, then a chance of snow.  Snow level 4500 feet lowering to 3100 feet after midnight . Cloudy, then gradually becoming partly cloudy, with a low around 32. West wind 9 to 13 mph, with gusts as high as 18 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 32 °F

    Rain/Snow
    Likely

  • Saturday

    Saturday: Sunny, with a high near 40. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 37 mph.

    High: 40 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30. Blustery, with a northwest wind 20 to 25 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 36 mph.

    Low: 30 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after 11am.  Mostly cloudy, with a high near 41.

    High: 41 °F

    Slight Chance
    Snow

  • Sunday Night

    Sunday Night: A chance of snow, mixing with rain after 8pm, then gradually ending.  Snow level rising to 6800 feet after midnight. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.

    Low: 36 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 54.

    High: 54 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain and snow. Snow level 3600 feet rising to 4700 feet after midnight. Low around 35. Breezy, with a west wind 19 to 29 mph decreasing to 7 to 17 mph. Winds could gust as high as 40 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Friday
Rain and snow. High near 43. West wind around 8 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Friday Night
Rain likely, possibly mixed with snow before 2am, then a chance of snow. Snow level 4500 feet lowering to 3100 feet after midnight . Cloudy, then gradually becoming partly cloudy, with a low around 32. West wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday
Sunny, with a high near 40. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 37 mph.
Saturday Night
Mostly cloudy, with a low around 30. Blustery, with a northwest wind 20 to 25 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 36 mph.
Sunday
A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 41.
Sunday Night
A chance of snow, mixing with rain after 8pm, then gradually ending. Snow level rising to 6800 feet after midnight. Mostly cloudy, with a low around 36. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 54.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 46.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 61.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 46. Breezy.
Thursday
Partly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Mattawa WA
 46.59°N 119.98°W (Elev. 3100 ft)
4:16 pm PDT Mar 12, 2026
7pm PDT Mar 12, 2026-6pm PDT Mar 19, 2026
 
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Additional Resources

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Hourly Weather Forecast

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