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

Hot Temperatures in the West; Heavy Rainfall and Flooding Potential in the Southwest

Hot to extremely hot temperatures are in place across coastal southern California again today and the interior Northwest U.S into Thursday, with the Pacific Northwest carrying the potential for record-breaking high temperatures. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring heavy rainfall and the potential for flooding through the week. Read More >

Hazardous Weather Conditions

Current conditions at

Tri-Cities Airport (KPSC)

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

haze

61°F

16°C

Humidity 82%
Wind Speed N 0 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 55°F (13°C)
Visibility 4.00 mi
Last update 03 Sep 07:35 AM PDT
Extended Forecast for

8 Miles S Mesa WA

Extreme Heat Warning September 3, 07:56am until September 4, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 3, 07:56am until September 4, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • Today

    High: 100 °F

    Haze

  • Tonight

    Tonight: Widespread haze before 11pm. Mostly clear, with a low around 65. West wind around 5 mph becoming light and variable in the evening.

    Low: 65 °F

    Haze then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 97. Light and variable wind becoming southwest around 6 mph in the afternoon.

    High: 97 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. East wind around 6 mph.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 95. North wind around 6 mph.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly 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

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

Detailed Forecast

Today
Widespread haze. Patchy smoke after 11am. Sunny and hot, with a high near 100. Calm wind becoming northwest around 6 mph in the afternoon.
Tonight
Widespread haze before 11pm. Mostly clear, with a low around 65. West wind around 5 mph becoming light and variable in the evening.
Thursday
Mostly sunny, with a high near 97. Light and variable wind becoming southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 66. East wind around 6 mph.
Friday
Sunny, with a high near 95. North wind around 6 mph.
Friday Night
Partly cloudy, with a low around 66.
Saturday
A 20 percent chance of showers before 11am. Partly sunny, with a high near 89.
Saturday Night
Mostly cloudy, with a low around 62.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 60.
Monday
A slight chance of showers. Partly sunny, with a high near 80.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 57.
Tuesday
A chance of showers. Partly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles S Mesa WA
 46.45°N 119.01°W (Elev. 659 ft)
Last Update:
4:20 am PDT Sep 3, 2025
Forecast Valid:
7am PDT Sep 3, 2025-6pm PDT Sep 9, 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