336
FXUS64 KMRX 241723
AFDMRX

Area Forecast Discussion
National Weather Service Morristown TN
123 PM EDT Sun Aug 24 2025

...New DISCUSSION, AVIATION...

.DISCUSSION...
Issued at 104 PM EDT Sun Aug 24 2025

Key Messages:

1. A few showers, and perhaps an isolated storm, across the
Appalachians through early evening. Patchy fog overnight.

2. Dry and much cooler conditions expected Monday through
Wednesday with lows nearing records on Wednesday morning.

3. Slightly warmer and mostly dry conditions are expected late in
the week and into next weekend.

Discussion:

A few showers and isolated storms will occur east of I-75, but
mainly across the Appalachians, through this evening. Then, a cold
front will move through tonight. Patchy fog possible areawide
overnight, but better chances east of I-75 toward the foothills of
the Appalachians.

Behind the front, cooler and drier air will move into the region as
a broad trough becomes established across the eastern U.S. This will
result in daytime highs in the 70s for most areas with overnight
lows in the 50s. The coolest night/morning still looks like it
will occur Wednesday morning with temperatures in the upper 40s
across southwest VA and southwest NC, and low to mid 50s
elsewhere. These forecast lows will approach daily, record, low
temperatures for this date. Records below.


Date    Chattanooga    Knoxville      Tri-Cities     Oak Ridge
08-27   53(1942)       50(1879)       46(1945)       54(1966)

After Wednesday, low-end probabilities for precip return Thursday
into Friday as some shortwave energy makes its way through the
trough. Temperatures slightly warm but will still be around 5 to 8
degrees below normal. High pressure builds into the region for the
end of the week and into next weekend, meaning dry conditions but
with still below normal temperatures.

&&

.AVIATION...
(18Z TAFS)
Issued at 104 PM EDT Sun Aug 24 2025

Drier air will move into the region overnight. Mostly VFR
conditions are expected with winds less than 10kts. MVFR fog and
ceilings, or lower, are possible at TRI late in the night and
into sunrise.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             61  81  61  77 /   0   0   0   0
Knoxville McGhee Tyson Airport, TN  61  80  58  77 /   0   0   0   0
Oak Ridge, TN                       58  79  57  77 /   0   0   0   0
Tri Cities Airport, TN              59  76  54  74 /  10   0   0   0

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...NONE.
VA...NONE.
&&

$$

DISCUSSION...
AVIATION...