Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. 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

  • Overnight

    Overnight: Mostly cloudy, with a low around 28. Northwest wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 28 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41. North wind 6 to 8 mph becoming south in the morning.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of snow, mixing with rain after 8pm, then gradually ending.  Snow level rising to 6500 feet after midnight. Mostly cloudy, with a low around 36. Southeast wind 6 to 8 mph becoming southwest after midnight.  Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 55. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 55 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 45. Southwest wind 15 to 17 mph, with gusts as high as 24 mph.

    Low: 45 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 11pm.  Mostly cloudy, with a low around 47. Breezy.

    Low: 47 °F

    Slight Chance
    Rain and
    Breezy then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain.  Mostly cloudy, with a low around 48. Breezy.

    Low: 48 °F

    Slight Chance
    Rain and
    Breezy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 28. Northwest wind 9 to 14 mph, with gusts as high as 24 mph.
Sunday
Partly sunny, with a high near 41. North wind 6 to 8 mph becoming south in the morning.
Sunday Night
A slight chance of snow, mixing with rain after 8pm, then gradually ending. Snow level rising to 6500 feet after midnight. Mostly cloudy, with a low around 36. Southeast wind 6 to 8 mph becoming southwest after midnight. Chance of precipitation is 20%.
Monday
Partly sunny, with a high near 55. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 45. Southwest wind 15 to 17 mph, with gusts as high as 24 mph.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 47. Breezy.
Wednesday
Mostly cloudy, with a high near 60.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 48. Breezy.
Thursday
A slight chance of rain before 11am. Partly sunny, with a high near 62.
Thursday Night
A slight chance of rain. Mostly cloudy, with a low around 50. Breezy.
Friday
Partly sunny, with a high near 64.
Friday Night
Mostly cloudy, with a low around 47.
Saturday
Mostly cloudy, 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)
11:50 pm PDT Mar 14, 2026
1am PDT Mar 15, 2026-6pm PDT Mar 21, 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