Northwest Flow Aloft
Friday, August 21, 2026 · 6:24 AM
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Drier with slightly below normal temperatures this weekend, especially overnight, then near normal temperatures mid next week. Low to medium rain chances return next week. The dead calm creeps across the Alabama state line. The evening storms expire into the dark. The cape boundary vanishes into cold night air. PATCHY FOG WRAPS A SHROUD OVER THE VALLEY! TEMPERATURES DROP TO THE MID SIXTIES! NO ESCAPE FROM THE DAMP STAGNANT AIR! The troff directly overhead weighs down upon the land. Highs reaching the eighties and touching ninety degrees offer no warmth. Overnight lows sink into the low to mid sixties. Patchy fog returns to choke the Saturday dawn. The sky freezes solid beneath the descending weight! A cold silence suffocates the plateau below! We wither away under a stagnant sky! Driven by northwest flow aloft! The dry pattern locks the weekend in iron chains. No salvation in sight as the pattern persists. Isolated rain chances rot on the horizon into mid week. Northwest flow carved deep into the upper atmosphere. Scattered showers linger like lingering shadows of doom. Temperatures trapped in the upper eighties and low nineties. DRIVEN BY NORTHWEST FLOW ALOFT! THE OVERHEAD TROFF SETTLES IN FOREVER! ISOLATED RAIN CANNOT SAVE US FROM THE COLD DRY VOID! WE ARE TRAPPED BENEATH THE ENDLESS GREY!
The forecast discussion
KEY MESSAGES
Updated at 622 AM CDT Fri Aug 21 2026
- Drier with slightly below-normal temperatures this weekend, especially overnight, then near-normal temperatures mid next week.
- Low to Medium rain chances return next week.
SHORT TERM
(Tonight through Saturday Night) Issued at 1028 PM CDT Thu Aug 20 2026
Things are more active along the AL state line this evening, as storms ride a CAPE boundary east.
Elsewhere in Middle Tennessee, things are calmer.
Overnight, expect these thunderstorms to push east out of Middle Tennessee and temperatures to dip into the mid 60s to low 70s for lows.
Friday will start off with some patchy fog around the area.
There are some shower and thunderstorm chances in the afternoon on the Cumberland plateau, but overall the trough directly overhead should help keep things relatively stable.
Highs will be a little cooler in the 80s with some spots touching 90 degrees.
More patchy fog is on the docket for Friday night into Saturday morning as well, with low temperatures in the low to mid 60s.
LONG TERM
(Sunday through next Friday) Issued at 1028 PM CDT Thu Aug 20 2026
As the trough settles in, the pattern turns dry for the weekend.
Into the beginning of the work week, we remain in NW flow aloft, which looks to bring in isolated rain chances through mid-week.
Rain chances look to become more scattered into mid-week as NW flow persists.
Temperatures will remain in the upper 80s to low 90s through the forecast period.