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Area Forecast Discussion (AFD)

Issued by Peachtree City, GA (FFC)

FXUS62 KFFC 122351

Area Forecast Discussion
National Weather Service Peachtree City GA
651 PM EST Tue Dec 12 2017

Northwest winds remain elevated/gusty this evening as a deep 
trough pivots into New England. At the surface, the cold front has
exited off the southeast coast with high pressure building into 
the region from the west. The tight pressure gradient between the
departing front and incoming high does not relax until we get 
into the early morning hours Wednesday. So current thinking is 
that Wind Advisory timing should be good through 10pm. We will 
continue to monitor the winds, but still seeing some sustained 
20mph across north Georgia. Temperatures are forecast to drop into
the teens across far NE Georgia to the mid/upper 20s elsewhere. 
Add wind and this will lead to wind chills in the the single 
digits up in the higher elevations to upper teens/low 20s by 
sunrise. Be sure to bundle up tomorrow morning! 



.PREV DISCUSSION... /Issued 239 PM EST Tue Dec 12 2017/ 

SHORT TERM /Tonight through Wednesday Night/...
Short term forecast relatively benign. Cold front moving through the 
state will bring drier and cooler air to the state into late week. 
Increased cloud cover this afternoon is already starting to 
dissipate over north Georgia as the front makes forward progress. 
Tight pressure gradient is producing high winds, and Wind Advisory 
remains in effect until 10 PM tonight. Expect wind speeds to 
diminish somewhat overnight, and more significantly Wednesday as the 
gradient relaxes. Temperatures will make a return to the 20s 
Wednesday morning, with highs in the 40s to low 50s. A gradual warm 
up is expected into the long term, with lows on Thursday in the 30s. 


LONG TERM /Thursday through Tuesday/...
A dry cold front will move slowly south across the CWFA during the 
day on Thursday, and finally push into the Florida panhandle by late 
Friday. High pressure will briefly build in for Saturday, but the 
high center should move offshore by early Sunday as a low pressure 
center from the western GOM moves onshore. Abundant moisture is 
expected just ahead of the system, and rain chances should begin to 
increase late Sunday into Monday. There are still some differences 
in the models, but the ECMWF and GFS both show high PoPs across the 
NW corner of the CWFA by Sunday night. 

No major changes to most elements within the long term forecast 
period. However, did bump pops up Sunday night into Monday.



00Z Update...
VFR conditions expected through the TAF period as high pressure
controls the sensible weather. Gusty NW flow (10-15kts) will 
continue through the next several hours, eventually relaxing by 
early Wednesday morning. Clear skies through the overnight with 
some high clouds sweeping through during mid-morning. With a bit 
of mixing during the afternoon, would not be surprised to see some
gusts around 15-18kts briefly. Winds will back to SW as the high 
shifts further into the GOM during the afternoon. 

//ATL Confidence...00Z Update... 
High confidence on all elements.  



Athens          26  47  35  55 /   0   0   0   0 
Atlanta         27  46  36  54 /   0   0   0   0 
Blairsville     19  42  29  46 /   0   0   0   5 
Cartersville    24  46  33  50 /   0   0   0   5 
Columbus        30  51  37  59 /   0   0   0   0 
Gainesville     26  44  35  51 /   0   0   0   0 
Macon           28  51  35  59 /   0   0   0   0 
Rome            25  47  33  50 /   0   0   0   5 
Peachtree City  26  48  34  56 /   0   0   0   0 
Vidalia         31  51  37  61 /   0   0   0   0 


Wind Advisory until 10 PM EST this evening for the following 
zones: Banks...Barrow...Bartow...Carroll...Catoosa...Chattooga...
Lumpkin...Madison...Murray...Newton...North Fulton...Oconee...
Paulding...Pickens...Polk...Rockdale...South Fulton...Towns...



LONG TERM....NListemaa