7/21/25: Severe Weather Alert: Heat Index Up to 109°F Today

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Lightning weather conditions for local forecast
WEATHER ALERTS

Heat Advisory

Heat Advisory issued July 20 at 8:14PM CDT until July 23 at 8:00PM CDT by NWS Nashville TN

* WHAT…Heat index values up to 108 expected.

* WHERE…A portion of Middle Tennessee.

* WHEN…From 11 AM Monday to 8 PM CDT Wednesday.

* 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 21, 2025 1:14 AM until July 21, 2025 8:00 PM

Weather Alerts

Severe weather conditions are currently being monitored in Sumner County, TN. A Heat Advisory has been issued until July 23 at 8 PM CDT. Please stay tuned for further updates and remain weather aware.

Severe Weather Conditions

It’s currently 4:55 AM in Sumner County, TN, with severe weather ongoing. The temperature is 75°F, and humidity is at 100%, making the air feel heavy. Winds are calm, contributing to an oppressive atmosphere.

Weather Changes Coming

As we move into the day, the temperature is expected to rise significantly, reaching a high of 96°F. High humidity levels will make it feel much hotter, with heat index values possibly reaching up to 108°F. Be cautious, as these conditions can lead to heat illnesses.

Today’s Outlook

Throughout the day, temperatures will increase and remain high. At 11 AM, the heat advisory becomes effective, so plan to stay indoors during peak heat hours. Remember to drink plenty of fluids and limit outdoor activities until later in the evening.

Interactive Radar Map

Sumner County, TN
July 21, 2025

75°
H:96°
L:76°

wind icon
Wind
0 to 5 mph W

humidity icon
Humidity
100%

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Conditions
severe weather

24-Hour Forecast

Monday
cloud-rain icon
96°
|
74°
Showers And Thunderstorms Likely

Tuesday
cloud-rain icon
95°
|
74°
Chance Showers And Thunderstorms

Wednesday
sun icon
97°
|
75°
Sunny

Thursday
sun icon
97°
|
75°
Sunny

Friday
sun icon
95°
|
76°
Sunny then Slight Chance Showers And Thunderstorms

Saturday
cloud-rain icon
95°
|
75°
Chance Showers And Thunderstorms

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