7/20/25: Severe Weather Alert! Thunderstorms Possible This Afternoon

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Lightning weather conditions for local forecast
WEATHER ALERTS

Heat Advisory

Heat Advisory issued July 20 at 10:47AM CDT until July 21 at 8:00PM CDT by NWS Nashville TN

* WHAT…For the first Heat Advisory, heat index values up to 108
expected. For the second Heat Advisory, heat index values up to
109 expected.

* WHERE…A portion of Middle Tennessee.

* WHEN…For the first Heat Advisory, until 8 PM CDT this evening.
For the second Heat Advisory, from 11 AM to 8 PM CDT Monday.

* IMPACTS…Hot temperatures and high humidity may cause heat
illnesses.

SAFETY INSTRUCTIONS

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

Alert in effect from July 20, 2025 3:47 PM until July 21, 2025 12:00 AM

Additional Weather Alerts

  • Heat Advisory
    Heat Advisory issued July 20 at 10:47AM CDT until July 20 at 8:00PM CDT by NWS Nashville TN

Weather Alerts

Severe weather conditions are being closely monitored in Sumner County, TN. A Heat Advisory has been issued due to high heat index values, with the first advisory in effect until 8 PM CDT today. Please stay tuned for updates and remember to stay weather aware.

Severe Weather Currently

It’s currently 1:55 PM in Sumner County, TN, with severe weather conditions prevailing. The temperature is at 92°F, and calm winds make it feel quite warm outside. While humidity levels are unknown, the heat index is expected to reach as high as 108°F this afternoon, making conditions uncomfortable. The sky remains mostly clear, contributing to the intense heat in the area.

Weather Changes Coming

As the day progresses, temperatures are expected to climb to a high of 97°F, which will further increase the heat index. Even though winds are calm now, they could remain light, which may not provide much relief from the oppressive heat. This means that outdoor activities will feel more strenuous, and heat-related illnesses may become a concern.

Tonight’s Forecast

Looking ahead to later this evening, temperatures will gradually drop to a low of 76°F. However, with the lingering heat and humidity, the discomfort may continue. For your safety, it is recommended to drink plenty of fluids, stay indoors in air-conditioned spaces, and avoid strenuous activities during peak heat hours. Prepare accordingly for a hot summer night.

Interactive Radar Map

Sumner County, TN
July 20, 2025

92°
H:97°
L:76°

wind icon
Wind
5 mph WSW

humidity icon
Humidity
N/A%

bolt icon
Conditions
severe weather

24-Hour Forecast

This Afternoon
cloud-rain icon
97°
|
76°
Slight Chance Showers And Thunderstorms

Monday
sun icon
98°
|
75°
Mostly Sunny then Chance Showers And Thunderstorms

Tuesday
sun icon
96°
|
75°
Mostly Sunny then Chance Showers And Thunderstorms

Wednesday
sun icon
98°
|
76°
Sunny

Thursday
sun icon
96°
|
76°
Sunny then Slight Chance Showers And Thunderstorms

Friday
sun icon
96°
|
76°
Sunny then Chance Showers And Thunderstorms

Saturday
cloud-rain icon
95°
|
76°
Chance Showers And Thunderstorms

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