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

Hot Weather in the West; Heavy Rainfall and Flooding in the Southwest

Hot to extremely hot temperatures are in place much of this week across parts of California and the interior Northwest U.S, with the Pacific Northwest carrying the potential for record-breaking high temperatures. Monsoonal moisture over the Southwest U.S. may lead to heavy rainfall and instances of flash flooding through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Tri-Cities Airport (KPSC)

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

Clear

74°F

23°C

Humidity 59%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 02 Sep 08:53 AM PDT
Extended Forecast for

Pasco WA

Extreme Heat Warning September 2, 11:00am until September 4, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Today

    Today: Widespread haze. Sunny and hot, with a high near 99. Light and variable wind.

    High: 99 °F

    Haze

  • Tonight

    Tonight: Mostly clear, with a low around 67. Light northwest wind.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Widespread haze after 11am. Sunny and hot, with a high near 102. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 102 °F

    Haze

  • Wednesday Night

    Wednesday Night: Widespread haze before 8pm. Mostly clear, with a low around 69. North wind around 6 mph becoming calm in the evening.

    Low: 69 °F

    Haze then
    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Calm wind becoming west around 6 mph in the afternoon.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers before 11am. Partly sunny, with a high near 89.

    High: 89 °F

    Slight Chance
    Showers then
    Partly Sunny

Detailed Forecast

Today
Widespread haze. Sunny and hot, with a high near 99. Light and variable wind.
Tonight
Mostly clear, with a low around 67. Light northwest wind.
Wednesday
Widespread haze after 11am. Sunny and hot, with a high near 102. Calm wind becoming northwest around 6 mph in the afternoon.
Wednesday Night
Widespread haze before 8pm. Mostly clear, with a low around 69. North wind around 6 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 100. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 68.
Friday
Mostly sunny, with a high near 95.
Friday Night
Mostly cloudy, with a low around 69.
Saturday
A 20 percent chance of showers before 11am. Partly sunny, with a high near 89.
Saturday Night
Mostly cloudy, with a low around 66.
Sunday
Partly sunny, with a high near 87.
Sunday Night
Mostly cloudy, with a low around 64.
Monday
A slight chance of showers. Partly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pasco WA
 46.24°N 119.11°W (Elev. 397 ft)
Last Update:
8:36 am PDT Sep 2, 2025
Forecast Valid:
9am PDT Sep 2, 2025-6pm PDT Sep 8, 2025
 
Forecast Discussion
 
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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