Severe Thunderstorms and Heavy Rainfall in the Ohio Valley and Great Lakes; Winter Weather in the Northern Tier

A slow moving front extending from the Great Lakes region into the Plains will bring snow, wintry mix, and ice accumulation north of the front from the Upper Midwest into New England, and severe weather and heavy rain south of the front. Scattered severe thunderstorms with damaging gusts, severe hail, and heavy rain are expected across parts of the Great Lakes/Midwest through tonight. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

N/A

Humidity 87%
Wind Speed N 0 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 10 Mar 07:35 AM PDT
Extended Forecast for

11 Miles SSW Mattawa WA

  • Tonight

    Tonight: A slight chance of rain between 2am and 5am, then rain likely, possibly mixed with snow.  Snow level 3200 feet rising to 4100 feet. Mostly cloudy, with a low around 36. Southwest wind around 7 mph.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 36 °F

    Mostly Cloudy
    then
    Rain/Snow
    Likely

  • Wednesday

    Wednesday: Rain likely, possibly mixed with snow before 11am, then rain.  Snow level 3500 feet rising to 5000 feet in the afternoon. High near 45. South wind 9 to 14 mph, with gusts as high as 22 mph.  Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 45 °F

    Rain/Snow
    Likely then
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 8pm, then rain and snow likely between 8pm and 11pm, then a slight chance of snow after 11pm.  Snow level 4900 feet lowering to 3100 feet after midnight . Mostly cloudy, with a low around 34. West wind 13 to 17 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely then
    Slight Chance
    Snow

  • Thursday

    Thursday: A slight chance of snow after 11am, mixing with rain after 2pm.  Partly sunny, with a high near 49. West wind 15 to 21 mph, with gusts as high as 32 mph.  Chance of precipitation is 20%.

    High: 49 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Breezy, with a west wind 14 to 22 mph, with gusts as high as 32 mph.

    Low: 34 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of rain between 2am and 5am, then rain likely, possibly mixed with snow. Snow level 3200 feet rising to 4100 feet. Mostly cloudy, with a low around 36. Southwest wind around 7 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday
Rain likely, possibly mixed with snow before 11am, then rain. Snow level 3500 feet rising to 5000 feet in the afternoon. High near 45. South wind 9 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain likely before 8pm, then rain and snow likely between 8pm and 11pm, then a slight chance of snow after 11pm. Snow level 4900 feet lowering to 3100 feet after midnight . Mostly cloudy, with a low around 34. West wind 13 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
A slight chance of snow after 11am, mixing with rain after 2pm. Partly sunny, with a high near 49. West wind 15 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 34. Breezy, with a west wind 14 to 22 mph, with gusts as high as 32 mph.
Friday
Sunny, with a high near 54.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 59.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
Partly sunny, with a high near 62.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Partly sunny, with a high near 64.
Monday Night
Mostly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Mattawa WA
 46.59°N 119.98°W (Elev. 3100 ft)
5:50 pm PDT Mar 31, 2026
7pm PDT Mar 31, 2026-6pm PDT Apr 7, 2026
 
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Additional Resources

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