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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Hazardous Weather Conditions

Current conditions at

Tri-Cities Airport (KPSC)

Lat: 46.26955°NLon: 119.11813°WElev: 397.0ft.

Clear

63°F

17°C

Humidity 72%
Wind Speed NNW 3 MPH
Barometer 30.07 in (1018.29 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 09 Aug 07:35 AM PDT
Extended Forecast for

Prosser WA

Extreme Heat Watch August 10, 12:00pm until August 12, 10:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Today

    Today: Mostly sunny, with a high near 91. West wind around 5 mph.

    High: 91 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. West wind 3 to 5 mph.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 97. Northwest wind 3 to 5 mph.

    High: 97 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 65. Northwest wind around 6 mph becoming light and variable.

    Low: 65 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 102. Light and variable wind becoming southeast around 6 mph in the afternoon.

    High: 102 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 67.

    Low: 67 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 102.

    High: 102 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 91. West wind around 5 mph.
Tonight
Mostly clear, with a low around 60. West wind 3 to 5 mph.
Sunday
Sunny, with a high near 97. Northwest wind 3 to 5 mph.
Sunday Night
Clear, with a low around 65. Northwest wind around 6 mph becoming light and variable.
Monday
Sunny and hot, with a high near 102. Light and variable wind becoming southeast around 6 mph in the afternoon.
Monday Night
Clear, with a low around 67.
Tuesday
Sunny and hot, with a high near 102.
Tuesday Night
Clear, with a low around 62.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 83.
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:
4:20 am PDT Aug 9, 2025
Forecast Valid:
7am PDT Aug 9, 2025-6pm PDT Aug 15, 2025
 
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