U.S. Weather Extremes for
Tuesday, December 18, 2018

High Temperature

83°F at Roosevelt Roads Nas, PU
83°F at Charlotte Amalie Virgi, IS

Low Temperature

-9°F at Mount Washington, NH

High Precipitation

4.50in at Stampede Pass, WA

Data for lower 48 states and courtesy of

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NWS Area Forecast Discussion
AFD issued by the Atlanta/Peachtree City, GA NWS forecast office.

FXUS62 KFFC 191143

Area Forecast Discussion
National Weather Service Peachtree City GA
643 AM EST Wed Dec 19 2018

.PREV DISCUSSION... /Issued 335 AM EST Wed Dec 19 2018/

SHORT TERM /Today through Thursday/...
Surface high pressure will slide off the Carolina coast today, as
an upper level short wave swings into the Mississippi valley.
East winds will set up cold air damming across the area.
Increasing moisture and a surface low which develops over the
northern Gulf of Mexico overnight and lifts across the forecast
area tomorrow will bring moderate to localized heavy rain across
the area. Limited instability noted across the area, and have
dropped the mention of thunder during the day tomorrow. Have
hedged temperatures closer to ECS guidance as it has out performed
the other models the past few days.


LONG TERM /Thursday Night through Tuesday/...
Low pressure will move across the CWFA Thursday night through
Friday. The low pressure wave will sweep a cold front through later
in the day on Friday, ushering in a cooler airmass. High pressure
will build in behind the front for the remainder of the weekend. The
weather becomes a bit more unsettled early next week, as several
frontal boundaries move through the area.

Widespread precipitation will be ongoing for the first part of the
long term forecast. Storm Total precip continues to average between
one and two inches, with some locally higher amounts. The axis of
heavier rainfall has shifted from the northern quarter of the CWFA
to the SE...ahead of the low center.

There is still some potential for wintry precip across the far north
CWFA. Soundings show that moisture should begin to rapidly decrease
behind the cold front, and models have backed of off pops/QPF.
However, do think that some orographically forced RW/SW showers are

Another frontal boundary is expected to move through during the
first part of the week. Models have trended higher with the
pops/moisture, but chances still remain best up north. Another
system is expected to impact the CWFA by the middle of the week.



12Z Update...
VFR conditions will slowly deteriorate to MVFR after 00Z. Winds
will be NE to SE at 6kts or less until late in the period when
wind speeds will increase to 5-10kts.

//ATL Confidence...12Z Update...
Medium to high confidence all elements.



Athens          57  44  52  46 /   5  60  90  80
Atlanta         59  46  54  45 /   5  80  90  80
Blairsville     54  40  52  42 /   0  50  90  80
Cartersville    57  45  53  44 /   5  70  90  80
Columbus        61  48  58  47 /  10  90  90  70
Gainesville     54  43  50  45 /   5  60  90  80
Macon           62  47  58  48 /   5  90  90  60
Rome            57  44  53  44 /   5  70  90  80
Peachtree City  59  46  55  45 /   5  80  90  70
Vidalia         62  52  64  51 /   5  80  90  60




LONG TERM....NListemaa

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