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

Hazardous Weather Conditions

Current conditions at

Columbia / Maury County (KMRC)

Lat: 35.55°NLon: 87.18°WElev: 676ft.

Fair

81°F

27°C

Humidity 79%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 73°F (23°C)
Visibility 9.00 mi
Heat Index86°F (30°C)
Last update 18 Sep 9:10 am CDT
Extended Forecast for

3 Miles SSE Williamsport TN

Heat Advisory September 18, 09:35am until September 20, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 18, 09:35am until September 20, 07:00pm

    NOW until 7:00pm Sun

    Heat Advisory

  • Today

    High: 99 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming northwest around 5 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 98. Calm wind.

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Calm wind.

    High: 98 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny and hot, with a high near 99. Heat index values as high as 106. Calm wind.
Tonight
Mostly clear, with a low around 72. Calm wind.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming northwest around 5 mph.
Saturday Night
Mostly clear, with a low around 71. Calm wind.
Sunday
Mostly sunny and hot, with a high near 98. Calm wind.
Sunday Night
Partly cloudy, with a low around 70. Calm wind.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Calm wind.
Monday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 68. Calm wind. Chance of precipitation is 50%.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Calm wind becoming northwest around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Williamsport TN
 35.6°N 87.21°W (Elev. 600 ft)
Last Update:
5:06 am CDT Sep 18, 2026
Forecast Valid:
9am CDT Sep 18, 2026-6pm CDT Sep 24, 2026
 
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