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

Thunderstorms and Heavy Rainfall in the Mid-Atlantic; Fire Weather Concerns in the West

Thunderstorms are expected to bring heavy rain and potential significant flash and urban flooding to the Mid-Atlantic on Thursday, especially along the I-95 urban corridor. Dry conditions, gusty winds, and isolated dry thunderstorms will continue to bring a critical fire weather threat to the northwestern Great Basin into the interior Northwest through Thursday. Read More >

Current conditions at

Tri-Cities Airport (KPSC)

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

Clear

79°F

26°C

Humidity 54%
Wind Speed ENE 3 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 30 Jul 10:20 PM PDT
Extended Forecast for

Prosser WA

  • Tonight

    Tonight: Partly cloudy, with a low around 65. West wind around 7 mph.

    Low: 65 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. West wind 5 to 7 mph.

    High: 100 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. West wind 6 to 8 mph.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 91. West wind 5 to 7 mph.

    High: 91 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers. Partly cloudy, with a low around 62. West wind 5 to 7 mph.

    Low: 62 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 65. West wind around 7 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. West wind 5 to 7 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. West wind 6 to 8 mph.
Friday
A 30 percent chance of showers, mainly before 11am. Partly sunny, with a high near 91. West wind 5 to 7 mph.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62. West wind 5 to 7 mph.
Saturday
Sunny, with a high near 92.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Sunny, with a high near 90.
Sunday Night
Mostly cloudy, with a low around 58.
Monday
Partly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
10:15 pm PDT Jul 30, 2025
Forecast Valid:
10pm PDT Jul 30, 2025-6pm PDT Aug 6, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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