282
FXUS62 KFFC 131034
AFDFFC

Area Forecast Discussion
National Weather Service Peachtree City GA
634 AM EDT Thu Aug 13 2026



...New 12Z Aviation Discussion...

.KEY MESSAGES...

-  Scattered thunderstorms will be possible each day this week
   posing a threat for gusty winds and locally heavy rainfall.

-  A Heat Advisory is in effect for portions of central and east
   Georgia for Thursday afternoon.

-  Impactful heat is becoming increasingly likely as heat indices
   climb into the 100s during the late week and into the weekend.

&&

.SHORT TERM...
(Today through Friday)
Issued at 309 AM EDT Thu Aug 13 2026

The northwest flow pattern we have experienced the past couple of
days will begin to shift late today into tomorrow as the
subtropical ridging begins building northward into the area. For
today, likely to see isolated to scattered thunderstorms as the
pattern begins to shift. Cape values in the 1500-2500 J/kg range,
very little shear and PWATs in the 1.8-2.3"+ range will result in
the main threats with any storms that form will be gusty winds
(40-50mph) and locally heavy rainfall. Pushing into tomorrow, the
ridging will fully push into Georgia which is likely to limit any
linear nature to storm coverage to the Carolinas versus here.
Nevertheless, there are still chances for isolated to scattered
thunderstorms again tomorrow afternoon and evening aided by the
high temperatures and humidity.

Temperatures will be the main story as we begin the pattern of hot
and humid conditions through the weekend. For today, high
temperatures are forecast to be in the mid to upper 90s across the
area which in combination with above average moisture will lead to
heat index values in the 100-108 range for much of north and
central Georgia. A heat advisory is in effect for areas of central
and eastern Georgia today as a result. For tomorrow, the high
temperatures will again be in the mid to upper 90s which puts much
of the area in the 100-108 range again for heat index values. Will
need another heat advisory for Friday. Although high temperatures
will stay well below the record highs, the low temperatures will
be flirting with the record high mins over the next several days
for many sites with lows in the mid 70s.

&&

.LONG TERM...
(Friday night through Wednesday)
Issued at 309 AM EDT Thu Aug 13 2026

The Long-Term period begins with a ridge centered over the
Mississippi Valley region, which will amplify and build eastward,
governing the forecast over the extended period. As it does,
oppressive heat and humidity will ensue from Friday through the
beginning of next week, with high temperatures building into the mid
to upper 90s over most of the CWA, outside of the far northeastern
mountains. These higher temperatures, in combination with
precipitable water values ranging from 1.8-2.3 inches and dew points
in the upper 70s, will create unsafe afternoon conditions. As a
result, heat index values in the 105-110F range are expected in the
central and eastern counties by Friday and across most of the CWA by
the start of the weekend, likely warranting the issuance of a Heat
Advisory each day.

The suppressive high-pressure conditions should support a reduction
in precipitation chances through the beginning of next week, with
models showing diurnal thunderstorm chances dwindling to isolated
coverage as we move into the weekend. One caveat is the continuation
of northwest flow, at least through Friday, followed by any
disturbances that may transit the periphery of the ridge, which
could enhance or trigger a few more afternoon thunderstorms than
currently expected. If so, some of these stronger storms could

&&

.AVIATION...
(12Z TAFS)
Issued at 633 AM EDT Thu Aug 13 2026

High level clouds will continue past sunrise with a cu field
developing ~15-16z at 3-4kft again today. Chance for TSRA from
~18-23z today. West winds will pick up into the afternoon at
7-9kt across the area before decreasing again overnight.


//ATL Confidence...12Z Update...
Medium to high confidence on all elements.

Hernandez

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          96  75  99  75 /  20  10  20  10
Atlanta         94  76  95  77 /  20   0  20  10
Blairsville     87  70  88  71 /  20  10  30  10
Cartersville    93  75  95  75 /  30  10  20  10
Columbus        95  77  96  77 /  30  10  20  10
Gainesville     93  75  95  75 /  20  10  20  10
Macon           95  75  96  75 /  30  10  20  20
Rome            93  74  95  75 /  20  10  20   0
Peachtree City  93  75  95  75 /  30  10  10  10
Vidalia         96  77  98  76 /  20  10  20  20

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from 1 PM this afternoon to 8 PM EDT this evening
for GAZ027-036>039-047>051-058>062-069-071>076-078>086-089>098-
102>113.

&&

$$

SHORT TERM...Hernandez
LONG TERM....82
AVIATION...Hernandez