Area Forecast Discussion
Issued by NWS Atlanta, GA

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FXUS62 KFFC 081441
AFDFFC

Area Forecast Discussion
National Weather Service Peachtree City GA
941 AM EST Thu Dec 8 2016



.UPDATE...
Re-enforcing shot of cold air has started to push south across the
CWFA this morning. Winds have picked up behind the surface trough,
and conditions will be breezy today. No major changes needed to
the grids today, but have made a few tweaks to the sky grids and
hourly temp/dew grids.

&&



.PREV DISCUSSION... /Issued 628 AM EST Thu Dec 8 2016/

Previous Discussions.../Issued at 345 AM EST Thu Dec 8 2016/

SHORT TERM /Today through Friday/...
Main story this short term is the blast of cold Arctic air that will
begin to spread into the area today and continue into the weekend.
This courteous of a very cold dome of high pressure that is building
south of Canada and progged to settle over the OH and TN Vallie`s by
Friday. Breezy northwest winds today behind a cold front will begin
to usher in the coldest airmass felt so far this winter... with
highs today across north GA struggling to get into the mid and upper
40s as the cold air arrives. Parts of central GA may see temps
briefly in the mid and upper 50s later today... but then the very
cold air arrives by this evening and overnight... with lows tonight
plummeting into the 20s for most areas. The breezy north winds will
persist tonight... so wind chills will dip into the teens by early
Friday morning. Make sure you bundle the kids up in layers for the
bus stop. Highs on Friday will struggle to get into the 40s across
far north GA while most other areas will only see highs in the 40s.
The coldest temperatures will be felt Friday night... with teens and
lower 20s seen across most of far north GA... and only mid and upper
20s felt elsewhere. Altho winds do diminish significantly by Friday
night... the 4 to 7 mph north winds will still produce wind chills
in the upper teens for many areas early Saturday morning.

Remember... with temperatures dipping into the 20s each night... be
sure to protect exposed water pipes... outdoor sensitive plants and
any pets that normally stay outside. Don`t forget to check on the
elderly and use extra caution with any type of space heater.

39

LONG TERM /Friday Night through Wednesday/...
Medium range models continue to remain fairly similar with respect to
the large scale, progressive pattern, however significant differences
continue as well concerning the timing and amplitude of the smaller
scale features. Timing of the late weekend system remains essential
the same as recent model runs. Precipitation moves in late in the day
Sunday into the overnight period. The GFS is trending drier than the
ECMWF over the past few model cycles. Mid-week system showing even
bigger discrepancies between the two models with the GFS being the
wetter of the two systems this time. All-in-all, given these trends,
I have kept my extended forecast grids basically a blend for now.

20

AVIATION...
12Z Update...
Some sct/few patches of mvfr level clouds may traverse any of the
taf sites this morning... but expecting mostly mid to high
cloudiness through the afternoon. These clouds sct this evening. NW
winds will increase to around 13-16kts by 14-15z today... with gusts
into the 23-26kt range through the afternoon. The NW winds will
persist around 10-12kts overnight and on Friday... with ocnl
slightly higher gusts expected on Fri.

//ATL Confidence...12 Update...
High confidence on all elements.

39

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          52  27  45  25 /  10   5   0   0
Atlanta         48  26  42  25 /  10   0   0   0
Blairsville     42  20  36  18 /  10   5   0   0
Cartersville    47  24  40  22 /  10   0   0   0
Columbus        54  31  46  27 /  10   0   0   0
Gainesville     49  27  42  25 /  10   5   0   0
Macon           56  29  48  25 /  10   0   0   0
Rome            47  24  40  21 /  10   0   0   0
Peachtree City  50  26  42  23 /  10   0   0   0
Vidalia         61  35  50  30 /   5   5   0   0

&&

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

$$

SHORT TERM...
AVIATION...


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