Area Forecast Discussion
Issued by NWS Atlanta, GA

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FXUS62 KFFC 270209
AFDFFC

Area Forecast Discussion...Updated
National Weather Service Peachtree City GA
1005 PM EDT Thu Apr 26 2018

.Update...
Have tweaked the pops for the rest of the night. Looks like
mostly showers for the night with only an isolated thunderstorm.
Have added patchy fog to the forecast.

41

.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...
00Z Update...

Mixture of MVFR/VFR conditions expected to continue across the area
through the evening. Ceilings are likely to lower to IFR late
tonight/early Friday morning across most of the taf sites. Expect
scattered showers overnight with an isolated thunderstorm. Southeast
winds will become predominately southwest 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...00Z Update...

Medium all elements.

41

&&


.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...41 LONG TERM....DJN.83 AVIATION...41


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