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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

3 Miles N Greenbrier TN

Heat Advisory September 17, 04:07pm until September 19, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 17, 04:07pm until September 19, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 73 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 97 °F

    Hot

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming clear, with a low around 73. North northeast wind around 5 mph becoming calm.

    Low: 73 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming west around 5 mph in the afternoon.

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

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

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 97. West southwest wind around 5 mph.

    High: 97 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 72. East northeast wind around 5 mph becoming south after midnight.

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 95. South wind around 5 mph becoming north northwest in the afternoon.

    High: 95 °F

    Mostly Sunny

Detailed Forecast

Tonight
Clear, with a low around 73. Calm wind.
Friday
Sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming north northwest around 5 mph in the afternoon.
Friday Night
Mostly cloudy, then gradually becoming clear, with a low around 73. North northeast wind around 5 mph becoming calm.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 72. Calm wind becoming south around 5 mph after midnight.
Sunday
Sunny and hot, with a high near 97. West southwest wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 72. East northeast wind around 5 mph becoming south after midnight.
Monday
Mostly sunny, with a high near 95. South wind around 5 mph becoming north northwest in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68. Northeast wind around 5 mph becoming east southeast after midnight.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Greenbrier TN
 36.46°N 86.79°W (Elev. 801 ft)
Last Update:
2:36 pm CDT Sep 17, 2026
Forecast Valid:
4pm CDT Sep 17, 2026-6pm CDT Sep 24, 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