Area Forecast Discussion
Issued by NWS Atlanta, GA

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369
FXUS62 KFFC 261915
AFDFFC

Area Forecast Discussion
National Weather Service Peachtree City GA
315 PM EDT Thu Apr 26 2018


.SHORT TERM /Tonight through Friday Night/...

Closed upper low over northeast Mississippi/northwest Alabama
expected to slowly open up and lift east/northeast overnight.
Instability has remained very limited ahead of the system with
minimal deeper convection associated with the initial band of
showers pushing east across the forecast area this afternoon. Seeing
some better convection beginning to develop across northern Alabama
with the cold pool of air in the mid-levels associated with upper
low. Still see enough instability with this feature for at least a
slight chance of thunderstorms across the north into the evening.
Will also keep slight chance of thunder with the initial line of
convection as some warming has occurred ahead of the system. Although
severe thunderstorm chances are marginal, enough shear and steeping
lapse rates will keep that risk going into the evening as well.

Main upper low/short wave exits by sunrise Friday. Secondary short
wave dropping southeast in the northwest flow behind the exiting low
does not appear to have enough moisture to work with for anything
more than some lingering clouds through the day Friday.

20


.LONG TERM /Saturday through Thursday/...

Deep longwave trough covering much of the eastern CONUS will drive a
reinforcing shot of cooler/drier air across north and central GA
Saturday into Sunday. Blustery conditions will develop on Saturday
with gusty NW winds but it will remain dry.

Normals for this time of year (in ATL) are 75/54... expect temps to
be about 5-10F degrees cooler over the weekend and into Monday,
before upper level trough moves far enough off the east coast. By
Tuesday, through the middle of next week, dry conditions will
prevail but temps will warm in response to low lvl winds becoming
more southerly and a building upr lvl ridge. This upr ridge that is
expected to extend from the Gulf of Mexico up the Mid Atlantic,
should hold strong through the end of the work week... keeping any
weather systems away from the Georgia area.

DJN.83


&&


.AVIATION...
18Z Update...

Mixture of MVFR/VFR conditions expected to continue across the area
through the evening. Generally MVFR in the band of showers currently
working across the area from west to east. Ceilings are likely to
lower to IFR late tonight/early Friday morning across the Atlanta
metro TAF sites and possibly KAHN. After the band of showers, with
isolated embedded thunderstorms, pushes east of the area later this
evening, isolated to scattered showers and thunderstorms will linger
across the north and east into the early morning. Southeast to
southwest winds this afternoon will become predominately southwest
by this evening. Wind speeds 7-10kt through early evening
diminishing to 3-7kt overnight. Winds become northwest and increase
to 8-12kt after sunrise Friday.

//ATL Confidence...18Z Update...

Medium at best all elements.

20

&&


.PRELIMINARY POINT TEMPS/POPS...
Athens          51  73  50  75 /  80   5   5   0
Atlanta         52  71  51  73 /  70   0   5   0
Blairsville     46  66  44  68 /  80   5   5   5
Cartersville    51  72  49  73 /  70   0   5   0
Columbus        53  75  51  78 /  30   0   0   0
Gainesville     51  70  49  72 /  80   5   5   0
Macon           51  74  50  78 /  60   0   0   0
Rome            50  72  48  74 /  70   0   5   5
Peachtree City  51  73  49  75 /  60   0   0   0
Vidalia         56  76  54  78 /  60   5   5   0

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

SHORT TERM...20
LONG TERM....DJN.83
AVIATION...20



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