338
FXUS62 KFFC 122334
AFDFFC

Area Forecast Discussion
National Weather Service Peachtree City GA
734 PM EDT Wed Aug 12 2026


...New 00Z 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...
(This evening through Thursday)
Issued at 319 PM EDT Wed Aug 12 2026

Current radar loop shows scattered showers and thunderstorms
developing across mainly central and west GA this afternoon as there
is a weak wedge of high pressure across NE GA. Like the past few
days we are mainly expecting these storms to stay below severe
thresholds but can not rule out an isolated severe storm or two
popping up. This NW flow is expected to continue over the next few
days with a few waves moving getting caught in the flow and moving
across the area. PWATs are currently in the 2"-2.2" range with MU
Cape around 1500 to 2500 J/Kg and LIs in the -5 to -7 deg range. Not
much sheer available so looks like the greatest convective threats
are periods of heavy rain, frequent lightning strikes, small hail,
and strong gusty winds.

Temps will increase a bit Thu from today allowing portions of East
and Central GA to meet Heat Advisory criteria. Have issued the

&&

.LONG TERM...
(Friday morning through next Tuesday)
Issued at 319 PM EDT Wed Aug 12 2026

As the long term period begins on Friday morning, the axis of an
upper level ridge will be centered roughly along the Mississippi
River Valley. This ridge will gradually shift eastward and amplify
over the course of the day on Friday and into Saturday. Temperatures
will continue their steady climb underneath the ridge, with
afternoon highs on Friday forecast to be in the upper 90s in areas
south of I-85 and in the mid 90s to the north (excluding the far
northeast mountains). Deep moisture lingering across the area will
contribute to dewpoints in the low to mid 70s and precipitable water
values between 1.8-2.2 inches. This combination of heat and humidity
will contribute to heat index values in the triple digits across the
majority of the area, with values between 105 and 109 in portions of
central and east Georgia, which will warrant the issuance of another
Heat Advisory for Friday afternoon. High temperatures will be a
couple of degrees warmer areawide on Saturday, which could bring
heat indices across the majority of the forecast area above Heat
Advisory criteria and allow locations in east-central Georgia to
flirt with heat indices of 110 degrees.

Mid-range model guidance continues to indicate that the ridge will
help suppress precipitation chances through the weekend. However, it
should be noted that these models tend to overestimate the effects
of mixing under the ridge in the summer with deep moisture also
present under the ridge, while underestimating the persistent
northwesterly flow on the periphery of the ridge and how it can
favor MCS development and growth. Thus, at least isolated
thunderstorms will be possible each afternoon and evening
considering both the possibility of an active diurnal convective
pattern amid rising temperatures and the possibility of MCS
development. Stronger storms that develop could produce gusty winds
and locally heavy rainfall. On the flip side, showers and storms
that occur could provide some relief from the heat and prevent the
highest heat indices from being reached.

&&

.AVIATION...
(00Z TAFS)
Issued at 729 PM EDT Wed Aug 12 2026

Primarily VFR conds exp thru the TAF pd, with FEW-SCT cu at
3-6kft. Cannot rule out a pd of BKN IFR (perhaps LIFR) cigs around
daybreak, but conf too low for TAF mention. Chcs for aftn TSRA
will continue, with best window for direct terminal impacts from
19-23Z. TSRA may be accompanied by MVFR vsbys in heavy pcpn and
VRB gusts to 25kt. Surface winds may go CALM/VRB at times
overnight, generally remaining out of the W side at 5-10kts.

//ATL Confidence...00Z Update...
High confidence all elements.

96

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          74  96  75  98 /   0  10   0  10
Atlanta         75  94  76  95 /  10  20  10  10
Blairsville     68  86  70  88 /  20  20   0  20
Cartersville    73  93  75  95 /  10  20   0  10
Columbus        76  95  77  96 /  20  30  10  10
Gainesville     74  93  75  95 /   0  10   0  10
Macon           75  95  76  95 /  10  30  10  20
Rome            73  93  74  94 /  20  20   0  10
Peachtree City  73  93  75  94 /  10  30  10  10
Vidalia         75  97  77  98 /  10  30  10  20

&&

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

&&

$$

SHORT TERM...01
LONG TERM....King
AVIATION...96