Area Forecast Discussion
Issued by NWS Atlanta, GA

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FXUS62 KFFC 211147
AFDFFC

Area Forecast Discussion
National Weather Service Peachtree City GA
647 AM EST Sun Jan 21 2018



.PREV DISCUSSION... /Issued 258 AM EST Sun Jan 21 2018/

SHORT TERM /Today through Monday/...
An upper level low pressure system will traverse the region today,
with minimal impact other than increased clouds. At the surface,
high pressure settling over the area will result in
southerly/southeasterly flow, which will continue to allow for
warmer temperatures. Highs today are expected to top off in the 60s
to near 70. Lows overnight will only drop into the 40s.

Near the end of the short term, a cold front will approach the state
Monday evening, and have continued likely pops and slight chance of
thunder through the remainder of the period. Temperatures will
remain the 60s to low 70s Monday, and instability should be enough
to support isolated thunderstorms. At this time, models are only
indicating a few hundred CAPE as the front moves into the state
Monday evening, with instability dropping off into the overnight
period.

31

LONG TERM /Monday Night through Saturday/...
Models continue in pretty good general agreement through the short
term with some minor timing differences in next weekends system.
Early in the long term, a cold front will move across the CWA
Monday night. Areas of showers and isolated thunderstorms will
continue ahead of the front with the better chances across north
Georgia where the deeper moisture will be. By Tuesday morning the
cold front will be in the Carolinas with drier air spread across
the CWA. This dry air will continue across the CWA through
Friday. An H5 ridge will build over the eastern U.S. during the
latter half of the upcoming week, and by Saturday this ridge will
be to our east with southwest flow over the CWA by Friday night
and Saturday. At the surface the strong high pressure will be
ridging into the CWA Friday and Saturday with a cool easterly
flow. Another storm system will be developing over the midwest and
lower Mississippi Valley and this will spread moisture into the
CWA Friday night into Saturday. This will create an overrunning
situation with mainly light rain/drizzle developing Friday night
and Saturday over mainly north Georgia. Temperatures through the
long term will be near normal.

17

&&

.AVIATION...
12Z Update...
VFR conditions expected today, with FEW-SCT 5-7kft this afternoon,
followed by high clouds. Expect MVFR conditions to accompany
front as it moves through the state Monday, and have indicated
OVC015 for after 14z at KATL. Light westerly surface winds will
shift to the SSE this afternoon, generally between 18-21Z. Speeds
will be 5-7kt through the day, then nearly calm overnight, and
then 6-9kt mid morning Monday.

//ATL Confidence...12Z Update...
Medium on timing of wind shift.
High on all other elements.

31

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          67  43  63  46 /   0   0  50  60
Atlanta         65  46  63  44 /   0   0  50  60
Blairsville     62  41  57  38 /   0   0  80  80
Cartersville    65  45  63  41 /   0   0  60  60
Columbus        68  47  69  47 /   0   0  40  60
Gainesville     64  44  60  43 /   0   0  60  70
Macon           68  44  69  51 /   0   0  30  40
Rome            66  44  63  41 /   0   5  70  60
Peachtree City  66  44  65  44 /   0   0  50  60
Vidalia         68  46  72  57 /   0   5  20  40

&&

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

$$

SHORT TERM...31
LONG TERM....17
AVIATION...31


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