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

Prosser WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 30. West wind around 6 mph.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 51. Calm wind becoming east around 5 mph in the afternoon.

    High: 51 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of rain before 11pm.  Mostly cloudy, with a low around 38. East wind around 5 mph becoming light and variable  in the evening.

    Low: 38 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 66. Southwest wind 5 to 10 mph.

    High: 66 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 48. Southwest wind 9 to 11 mph.

    Low: 48 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 70.

    High: 70 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before 11pm.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Slight Chance
    Rain then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 30. West wind around 6 mph.
Sunday
Partly sunny, with a high near 51. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 38. East wind around 5 mph becoming light and variable in the evening.
Monday
Partly sunny, with a high near 66. Southwest wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 48. Southwest wind 9 to 11 mph.
Tuesday
Mostly cloudy, with a high near 70.
Tuesday Night
Mostly cloudy, with a low around 49.
Wednesday
Mostly cloudy, with a high near 72.
Wednesday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 50.
Thursday
Partly sunny, with a high near 74.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
Partly sunny, with a high near 75.
Friday Night
Mostly cloudy, with a low around 49.
Saturday
Mostly cloudy, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
11:50 pm PDT Mar 14, 2026
12am 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