Under 109
Sunday, September 13, 2026 · 11:26 AM
Watch and listen
Lyrics
Updated at eleven zero nine A.M. Central Daylight Time Sunday September thirteenth twenty twenty-six. Heat Advisory is in effect for Tuesday for most of Middle Tennessee west of the Cumberland Plateau. Heat indices up to one hundred nine degrees Fahrenheit are expected during the afternoon. Rain chances this week are negligible. The next rain chances aren't expected until the weekend. We should start to see a gradual cool-down late next weekend and early the following week. High pressure re-asserted— Eleven zero nine A.M.! Circulating— Broad upper ridge— Almost on top of us! Atmosphere drier today— Drier— Probability of precipitation— Zero! Close to zero! Low to mid nineties west of the Plateau— At twelve zero zero! At thirteen zero zero! Unrelenting heat! Unrelenting— Stalled at ninety-six! Warmer temperatures just ahead! Issued at eleven zero nine— Tuesday! Non-plateau counties! Heat index reaching— Exceeding— One hundred five degrees Fahrenheit! Extended through Wednesday? Uncertain! High pressure keeping every system away— Until the autumnal equinox! SURFACE BOUNDARY DROPPING SOUTHWARD! LOW PROBABILITY OF PRECIPITATION! NO RAIN! NO RAIN! ONE HUNDRED NINE DEGREES! THE ATMOSPHERE WILL NOT BREAK! The ridge is overhead, the moisture is dead! No rain until the weekend, heat burning red! We sweat, we collapse, we fall out of line! Suffocating under 109! Gradual cool-down... late next weekend... Hopefully... hopefully... First day of autumn... Under 109...
The forecast discussion
NEW SHORT TERM, LONG TERM
KEY MESSAGES
Updated at 1109 AM CDT Sun Sep 13 2026
- Heat Advisory is in effect for Tuesday for most of Middle Tennessee west of the Cumberland Plateau.
Heat indices up to 109F are expected during the afternoon.
- Rain chances this week are negligible.
The next rain chances aren't expected until the weekend.
- We should start to see a gradual cool-down late next weekend and early the following week.
SHORT TERM
(Rest of today through Monday) Issued at 1109 AM CDT Sun Sep 13 2026
High pressure has re-asserted itself at the surface and especially aloft, with a broad upper ridge circulating almost on top of us. So the atmosphere today is much less unstable and also significantly drier, and rain chances are therefore close to zero.
That's the way things are going to remain for awhile.
Meanwhile, the unrelenting heat is...well..unrelenting. Despite a relatively cool start to the day, afternoon temperatures are likely to warm into the low to mid 90s most areas west of the Cumberland Plateau.
And even warmer temperatures are up just ahead.
LONG TERM
(Monday Night through next Sunday) Issued at 1109 AM CDT Sun Sep 13 2026
A Heat Advisory has been issued for Tuesday for most of our non- Plateau counties.
Heat indices are expected to reach or exceed 105F for a large swath of the mid state.
The advisory may need to be extended through Wednesday, but that is much less certain.
So for now, we're focused on Tuesday's excessive heat.
High pressure will keep any weather-producing systems away from the region for most of next week.
The individual model solutions continue to show a surface boundary dropping southward toward Middle Tennessee by week's end, so we are introducing at least low PoPs this weekend and into early next week, with the possibility of a big cold frontal passage right around the time of the autumnal equinox.
Hopefully, this will be the last week for excessive heat.
All indications are that cooler weather is on the way just in time for the first day of autumn.