National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Strong to Severe Thunderstorms Continue Tonight in the East; Early Heat Wave in the West

Scattered strong to severe storms with damaging winds and potentially a tornado or two are expected tonight from the coastal Carolinas into the Mid-Atlantic states. An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. 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: Mostly cloudy, with a low around 45. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 31 mph.

    Low: 45 °F

    Mostly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 59. Breezy, with a southwest wind 16 to 22 mph, with gusts as high as 31 mph.

    High: 59 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48. Southwest wind around 16 mph, with gusts as high as 24 mph.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 61. Southwest wind 15 to 17 mph, with gusts as high as 26 mph.

    High: 61 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. Southwest wind 14 to 20 mph, with gusts as high as 29 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 63. Breezy.

    High: 63 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 50. Breezy.

    Low: 50 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Friday

    Friday: A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 62.

    High: 62 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 45. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 31 mph.
Tuesday
Mostly cloudy, with a high near 59. Breezy, with a southwest wind 16 to 22 mph, with gusts as high as 31 mph.
Tuesday Night
Mostly cloudy, with a low around 48. Southwest wind around 16 mph, with gusts as high as 24 mph.
Wednesday
Mostly cloudy, with a high near 61. Southwest wind 15 to 17 mph, with gusts as high as 26 mph.
Wednesday Night
Mostly cloudy, with a low around 49. Southwest wind 14 to 20 mph, with gusts as high as 29 mph.
Thursday
Partly sunny, with a high near 63. Breezy.
Thursday Night
Mostly cloudy, with a low around 50. Breezy.
Friday
A 20 percent chance of rain before 11am. Mostly cloudy, with a high near 62.
Friday Night
Mostly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 49.
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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:
4:16 pm PDT Mar 16, 2026
Forecast Valid:
7pm PDT Mar 16, 2026-6pm PDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation