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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

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

  • This Afternoon

    This Afternoon: Cloudy, with a high near 75. West wind around 17 mph, with gusts as high as 26 mph.

    High: 75 °F

    Cloudy

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 8pm and 2am. Cloudy, with a low around 46. West wind 6 to 14 mph, with gusts as high as 24 mph.

    Low: 46 °F

    Chance Rain

  • Saturday

    Saturday: Mostly cloudy through mid morning, then gradual clearing, with a high near 61. West wind 6 to 9 mph.

    High: 61 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33. West wind 5 to 8 mph.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 59. Calm wind becoming south around 5 mph in the afternoon.

    High: 59 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Monday Night

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

    Low: 43 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly after 11am. Cloudy, with a high near 63.

    High: 63 °F

    Chance Rain

Detailed Forecast

This Afternoon
Cloudy, with a high near 75. West wind around 17 mph, with gusts as high as 26 mph.
Tonight
A 30 percent chance of rain, mainly between 8pm and 2am. Cloudy, with a low around 46. West wind 6 to 14 mph, with gusts as high as 24 mph.
Saturday
Mostly cloudy through mid morning, then gradual clearing, with a high near 61. West wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 33. West wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 59. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 37.
Monday
Mostly cloudy, with a high near 60.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
A 30 percent chance of rain, mainly after 11am. Cloudy, with a high near 63.
Tuesday Night
A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 42.
Wednesday
A slight chance of rain. Partly sunny, with a high near 60.
Wednesday Night
Mostly clear, with a low around 33.
Thursday
Sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
2:30 pm PDT Mar 20, 2026
Forecast Valid:
2pm PDT Mar 20, 2026-6pm PDT Mar 26, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation