Colbert, Georgia Weather Forecast Discussion

916
FXUS62 KFFC 221809
AFDFFC
Area Forecast Discussion
National Weather Service Peachtree City GA
209 PM EDT Mon Sep 22 2025
...Afternoon Area Forecast Discussion...
.SHORT TERM...
(This afternoon through Tuesday)
Issued at 207 PM EDT Mon Sep 22 2025
Key Messages
- Isolated thunderstorms expected in northwest Georgia through 9
   PM this evening.
- Areas of dense fog could occur in east central Georgia between
   4 AM and 9 AM.
- Warmer on Tuesday, with afternoon high temperatures running 6
   to 12 degrees above seasonal averages.
This Evening and Overnight:
A shortwave moving through Tennessee and Kentucky will continue to
generate scattered thunderstorm activity. Some of these storms could
spill over into far northwest Georgia (Dade, Walker, Chattooga,
Catoosa and Whitfield Counties) through 9 PM this evening. The wave
should be lifting northwards as any storms move towards Georgia and
this should keep the most favorable conditions for convection across
portions of Tennessee. That said an isolated strong storm with winds
gusts near 40 mph can`t be ruled out.
Sunset and the loss of diurnal heating will bring any shower and
thunderstorm activity in north Georgia to an end this evening. This
will leave the region with fair skies and calm winds for the
overnight period. Areas of dense fog will be possible in east
central Georgia between 4 AM and 9 AM, where a sea breeze should
advect in higher surface dewpoints this evening. There is a low
chance (25%) that some of this fog could impact Macon Tuesday
morning. There is a 35% chance that we will need to issue a Dense
Fog Advisory for a portion of east central Georgia. Elsewhere in the
state some patchy dense fog could occur in the river valleys or
around the larger lakes, but it should be less widespread.
For Tuesday:
Isolated non severe thunderstorms are expected along and north of
Interstate 85 between 3 PM and 9 PM Tuesday. Where convection
develops it will need to survive and pull energy from a marginal
environment. Poor mid level (700-500 mb) lapse rates will lead to
narrow CAPE profiles and should limit updraft strength and lightning
intensity. Peak MUCAPE values should only be in the 500 to 1000 J/kg
range. Wind shear will be nonexistent and this should hinder the
ability of storms to organize and maintain themselves. Thus at this
time we don`t expect much more than a few lighting strikes and
isolated downburst wind gusts near 35 mph.
Heights (500 mb) and 850 mb temperatures will both inch upward in
Georgia on Tuesday. Afternoon high temperatures should respond to
these changes by rising by 1 to 4 degrees compared to today`s
values. Widespread temps in the low 90s are expected in central
Georgia (Macon & Columbus), while north Georgia will get a mix of
upper 80s and lower 90s. These readings will be anomalous for late
September, coming in at 6 to 12 degrees above seasonal averages.
Albright
&&
.LONG TERM...
(Wednesday morning through next Sunday)
Issued at 207 PM EDT Mon Sep 22 2025
Key Messages:
- Numerous showers and storms late Wed through Fri as a cold
   front moves through the region. Locally heavy rainfall in N GA.
- Above normal temperatures on Wednesday, returning to around
   normal for the rest of the week and over the weekend.
Wednesday will start off with continued hot, humid, and rain-free
conditions, aside from some isolated afternoon showers or storms
in NW Georgia. High temperatures will again be in the upper 80s
to low 90s, with heat index values in the low to mid 90s in north
GA, and upper 90s in central GA.
A large shift in the pattern will start to take place late
Wednesday as a potent stacked low moves into the Midwest and Ohio
Valley. From Wednesday night through Thursday, significant
moisture advection downstream of the low will spread across
Georgia, with PWAT values rising from 1.4" to around 1.8-2.1".
This will support multiple rounds of showers and thunderstorms
across the area through most of Friday, before a cold front
associated with the low pushes through late Friday. While
confidence in the overall synoptic setup during this time is
medium to high, details on the mesoscale setup will need to be
monitored as we get closer to the event. Some strong storms will
be possible, but widespread severe weather is not expected at
this time. Total rainfall amounts for Thu/Fri look to generally
be in the 0.5-1.5" across the area, with the higher end of that
range in north GA. There will be localized amounts higher than
this, with up to 4" possible in the hardest hit areas across
north GA. Very dry antecedent conditions will help mitigate most
flooding concerns, however there is an isolated risk for flash
flooding in the urban and higher terrain areas of north GA.
After the front passes through late Friday, the consensus
ensemble guidance continues to show drier and cooler air dropping
across the region for the upcoming weekend. It is worth
mentioning that some model solutions have a mid-level low cutting
off over the region and drifting back west/southwest, which would
bring the moisture back into the region and support decent rain
chances. However, these solutions appear very unlikely at this
time. So, for the upcoming weekend we can expect mostly dry
conditions with only slight chances (10%) for afternoon showers.
High temperatures would be in the upper 70s to low 80s in north
GA, and mid to upper 80s in central GA, with overnight lows in
the low to mid 60s.
Culver
&&
.AVIATION...
(18Z TAFS)
Issued at 134 PM EDT Mon Sep 22 2025
Isolated showers and thunderstorms area expected in northwest
Georgia through 02Z Tuesday. Additional isolated thunderstorm
activity is expected between 18Z Tuesday and 02Z Wednesday in
northwest Georgia. Areas of fog are possible in east central
Georgia between 08Z and 14Z Tuesday. Winds will be 2 to 8 kt from
the southeast through 00Z, then calm winds will occur between 01Z
and 13Z Tuesday. Southwest winds in the 2 to 8 kt range are
expected after 13Z Tuesday.
//ATL Confidence...18Z Update...
High confidence in all aspects of the forecast.
Albright
&&
.PRELIMINARY POINT TEMPS/POPS...
Athens          64  88  66  89 /   0  10   0  10
Atlanta         68  90  70  91 /   0  10  10  10
Blairsville     61  82  62  82 /  10  20  10  40
Cartersville    66  90  68  91 /   0  20  10  20
Columbus        68  93  70  95 /   0   0   0  10
Gainesville     64  87  68  89 /   0  10  10  20
Macon           66  90  68  93 /   0   0   0   0
Rome            67  91  68  92 /  10  20  10  30
Peachtree City  65  90  67  91 /   0  10   0  10
Vidalia         68  91  69  94 /   0  10   0  10
&&
.FFC WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
SHORT TERM...Albright
LONG TERM....Culver
AVIATION...Albright

NWS FFC Office Area Forecast Discussion