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

Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

52°F

11°C

Humidity 62%
Wind Speed N 8 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 11 Oct 09:35 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: Mostly sunny, with a high near 61. North wind 11 to 13 mph, with gusts as high as 22 mph.

    High: 61 °F

    Mostly Sunny

  • Tonight

    Tonight: Areas of frost after 5am. Otherwise, mostly clear, with a low around 36. North wind around 6 mph becoming calm in the evening.

    Low: 36 °F

    Partly Cloudy
    then Areas
    Frost

  • Columbus Day

    Columbus Day: Areas of frost before 11am. Otherwise, sunny, with a high near 63. Calm wind.

    High: 63 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. Calm wind.

    High: 66 °F

    Sunny

  • Tuesday Night

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

    Low: 38 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 61. North wind 11 to 13 mph, with gusts as high as 22 mph.
Tonight
Areas of frost after 5am. Otherwise, mostly clear, with a low around 36. North wind around 6 mph becoming calm in the evening.
Columbus Day
Areas of frost before 11am. Otherwise, sunny, with a high near 63. Calm wind.
Monday Night
Mostly clear, with a low around 32. Calm wind.
Tuesday
Sunny, with a high near 66. Calm wind.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
Sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 75.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
9:56 am PDT Oct 11, 2026
Forecast Valid:
10am PDT Oct 11, 2026-6pm PDT Oct 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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