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

Hazardous Weather Conditions

Current conditions at

Portland Municipal Airport (K1M5)

Lat: 36.59°NLon: 86.48°WElev: 818ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

2 Miles SSW White House TN

Heat Advisory September 20, 07:50am until September 20, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 20, 07:50am until September 20, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Today

    High: 97 °F

    Hot

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Calm wind becoming south around 5 mph after midnight.

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny, with a high near 95. Heat index values as high as 99. West southwest wind around 5 mph becoming north northwest in the morning. Chance of precipitation is 20%.

    High: 95 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms, then a chance of showers after 10pm. Partly cloudy, with a low around 68. North wind around 5 mph. Chance of precipitation is 30%.

    Low: 68 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. North wind 5 to 10 mph.

    High: 86 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Partly cloudy, with a low around 63. North wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. North wind 5 to 10 mph.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. North wind 5 to 10 mph.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Today
Mostly sunny and hot, with a high near 97. Heat index values as high as 100. South wind around 5 mph becoming west in the afternoon.
Tonight
Partly cloudy, with a low around 72. Calm wind becoming south around 5 mph after midnight.
Monday
A slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny, with a high near 95. Heat index values as high as 99. West southwest wind around 5 mph becoming north northwest in the morning. Chance of precipitation is 20%.
Monday Night
A slight chance of showers and thunderstorms, then a chance of showers after 10pm. Partly cloudy, with a low around 68. North wind around 5 mph. Chance of precipitation is 30%.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. North wind 5 to 10 mph.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 63. North wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 79. North wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 59. North wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 79. North wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 58.
Friday
Mostly sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 56.
Saturday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW White House TN
 36.43°N 86.68°W (Elev. 801 ft)
Last Update:
5:11 am CDT Sep 20, 2026
Forecast Valid:
7am CDT Sep 20, 2026-6pm CDT Sep 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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