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fxus62 kffc 081900 
afdffc

Area forecast discussion
National Weather Service Peachtree City Georgia
200 PM EST Thu Dec 8 2016

Short term /tonight through Friday night/...
high pressure will continue to build in across the County warning forecast area through
tomorrow. Cold air advection will usher in some of the coldest air
we have seen this season.

Copious mid and high level cloudiness will continue through early
tomorrow. These clouds will combine with 5mph to 10mph winds
overnight to hinder excellent radiational cooling. Have bumped up
the mint values for tonight a a few degrees.

The clouds should clear out by tomorrow afternoon, and the winds
should diminish to 5mph or less. This will lead to really good
radiational cooling conditions...and the lowest temps of the season
are expected Saturday morning.

Nlistemaa



Long term /Saturday through Thursday/...
mainly only tweaks to the long term based on the latest guidance.
There is a trend to warmer and more moist this model run.

Bdl

Previous discussion...
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
European model (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...
18z update...
high pressure will continue to build in across the area through
tomorrow. The main change to the previous taf cycle was to linger
the high/mid level cloudiness well into tomorrow afternoon. Cigs
will initially average around 12kft and then slowly rise to
20-25kft through tomorrow. Winds will remain on the west side and
be gusty this afternoon and during the day tomorrow. No precip
anticipated.

//Atl confidence...18z update...
high confidence all elements.

&&

Preliminary point temps/pops...
Athens 28 45 25 48 / 0 0 0 0
Atlanta 27 41 25 48 / 0 0 0 0
Blairsville 21 36 18 44 / 0 0 0 0
Cartersville 25 40 22 47 / 0 0 0 0
Columbus 31 47 27 51 / 0 0 0 0
Gainesville 27 42 25 46 / 0 0 0 0
Macon 30 47 24 51 / 0 0 0 0
Rome 25 41 21 47 / 0 0 0 0
Peachtree City 26 43 22 49 / 0 0 0 0
Vidalia 36 49 30 53 / 0 0 0 0

&&

Ffc watches/warnings/advisories...
none.
&&

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