584 
FXUS62 KFFC 280314
AFDFFC

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1014 PM EST SUN JAN 27 2013

.EVENING UPDATE...
LATEST SURFACE MAP SHOWS HIGH PRESSURE ALONG THE MID ATLANTIC COAST 
WITH COOLER TEMPS DRAINING DOWN INTO NE AND EAST CENTRAL GA...WHERE 
THE COOLER OVERNIGHT LOWS ARE NOW EXPECTED. AS MID AND LOW CLOUDS 
BEGIN SPREADING INTO THE FORECAST AREA LATE THIS EVENING AND EARLY 
MONDAY MORNING...EXPECT THIS LID TO HELP HOLD TEMPS SLIGHTLY WARMER 
THEN CURRENTLY PLANNED. THEREFORE... PLAN TO UPDATE ZONES TO WARM 
PROJECTED OVERNIGHT LOWS UP A DEGREE OR TWO IN MOST PLACES... 
ESPECIALLY FOR ATLANTA AND AREAS WEST AND SOUTH. RADAR SHOWS AREAS 
OF LIGHT RAIN HOLDING NORTH IN TN...AND THIS TREND IS EXPECTED TO 
CONTINUE... SO NIL POPS STILL LOOK ON TRACK. THEREFORE... NO 
OTHER CHANGES ANTICIPATED AT THIS TIME. 39   

.SHORT TERM /TONIGHT THROUGH TUESDAY/...
/ISSUED AT 211 PM EST SUN JAN 27 2013/
MID LEVEL MOISTURE WORKING ACROSS THE AREA RESPONSIBLE FOR GENERAL 
CLOUDINESS ACROSS NORTH GA THIS AFTERNOON.  MEANWHILE...COLD SURFACE 
HIGH WORKING DOWN THE EASTERN APPALACHIANS WILL WEDGE INTO THE 
REGION OVERNIGHT TONIGHT THROUGH MONDAY.  AT THE SAME TIME SOUTH TO 
SOUTHWESTERLY WINDS ABOVE 950 MB WORKING OVER THE COOL AIR AT THE 
SURFACE WILL BRING CLOUDS INTO THE REGION OVERNIGHT TONIGHT THROUGH 
MONDAY.  EXPECT VERY LITTLE IN THE WAY OF PRECIP BUT CLOUDS WILL AID 
IN KEEPING TEMPS DOWN A BIT ON MONDAY...PARTICULARLY ACROSS THE 
NORTHEAST SECTION OF GA.  AS THE SURFACE HIGH DEPARTS LATE 
MONDAY...SOUTH WINDS AND MOISTURE TRANSPORT WILL AID IN AREAS OF FOG 
DEVELOPING AFTER MIDNIGHT MONDAY.  WILL NEED TO MONITOR FOR POSSIBLE 
DENSE FOG ADVISORY ON LATER SHIFTS.  

VERY WARM DAY SETTING UP FOR TUESDAY AS STRONG SOUTHWESTERLY FLOW 
ALOFT SETS UP AHEAD OF AN APPROACHING TROF AND ASSOCIATED 140KT 
JET.  SHOULD BE A BIT BREEZY ON TUESDAY WITH SOUTH WINDS AND 
TEMPERATURES NEAR OR ABOVE 70 DEGREES IN MOST LOCATIONS WHICH IS NOT 
EXPECTED TO BREAK ANY RECORDS BUT IT WILL COME CLOSE. RECORDS FOR 
TUESDAY BELOW LISTED BELOW.  NO PRECIP IS EXPECTED THROUGH TUESDAY 
EVENING ACROSS NORTH AND CENTRAL GA.

RECORDS FOR 01-29

MAX TEMPERATURE

STATION  HIGH  YEAR
KAHN      78 2002
KATL      77 1975
KCSG      81 1957
KMCN      81 1957  

30

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
/ISSUED AT 211 PM EST SUN JAN 27 2013/
JUST A FEW CHANGES FROM THE PREVIOUS LONG TERM. BOTH GFS AND ECMWF 
HAVE COME TOGETHER ON TUESDAY NIGHT/WEDNESDAY SYSTEM WITH TIMING AND 
WITH STRENGTH. WILL INCREASE POPS SLIGHTLY ACROSS THE CWA ON 
WEDNESDAY. LOW LEVEL JET OF 60KTS SHOULD PROVIDE ENOUGH SHEAR FOR A 
FEW SEVERE THUNDERSTORMS. THE SYSTEM IS PROGGED TO EXIT THE CWA BY 
12Z THU. A MUCH WEAKER SYSTEM WILL ROTATE THROUGH THE BASE OF THE 
UPPER TROUGH THURSDAY NIGHT AND EARLY FRIDAY. BOTH GFS/ECMWF HAVE 
MOISTURE IN EXTREME NORTH GEORGIA SHORTLY AFTER 00Z FRI. WILL ADD 
LOW POPS TO EXTREME NORTH GA THURSDAY NIGHT. WITH AN ARCTIC AIRMASS 
IN PLACE...IT WILL BE COLD ENOUGH FOR THE MAJORITY OF THIS TO FALL 
AS SNOW. HOWEVER IT IS A FAST MOVING AND MOISTURE STARVED SYSTEM SO 
DO NOT EXPECT MUCH MORE THAN A DUSTING OF SNOW AT THIS TIME. THE 
REST OF THE LONG TERM LOOKS GOOD.

17

&&

.AVIATION... 
00Z UPDATE... SCT-BKN MID LEVEL CLOUDS ACROSS MOST TAF SITES AND 
THIS PATTERN WILL LIKELY PERSIST UNTIL LATE THIS EVENING WHEN 
INCREASING LOW-MID LEVEL MOISTURE SPREADS OVER THE COOL EASTERLY 
FLOW NEAR THE SURFACE... RESULTING IN AT LEAST MVFR CIGS AT MOST TAF 
SITES BY 05-06Z TONIGHT. ONCE MVFR CIGS SETTLE IN... THESE CIGS ARE 
EXPECTED TO PERSIST THROUGH THE REMAINING TAF PERIOD... WITH SOME 
SLIGHT IMPROVEMENT LIKELY MON AFTERNOON. NAM MOS STILL HINTS AT IFR 
CIGS DEVELOPING AROUND 12-14Z MON BUT ELEVATED WINDS AND DRY LAYER 
NEAR THE SURFACE WARRANTS HOLDING CIGS AT MVFR LEVELS FOR NOW. EAST 
WINDS AROUND 5-8KTS TONIGHT... WILL VEER MORE SE AROUND 6-8KTS MON 
AFTERNOON. 

//ATL CONFIDENCE...00Z UPDATE...
MEDIUM ON TIMING OF MVFR CIGS TONIGHT. 
HIGH ON REMAINING ELEMENTS.

39

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          38  55  43  70 /   5   5   5  10 
ATLANTA         41  58  49  70 /   5   5  10  10 
BLAIRSVILLE     34  53  41  62 /  10  10  10  10 
CARTERSVILLE    38  57  46  71 /   5   5  10  10 
COLUMBUS        46  68  53  75 /   5   5   5  10 
GAINESVILLE     38  54  45  65 /  10  10   5  10 
MACON           44  68  51  76 /   5   5   5  10 
ROME            37  60  46  71 /   0   5  10  10 
PEACHTREE CITY  39  61  45  72 /   5   5  10  10 
VIDALIA         46  72  56  78 /   5   5   5  10 

&&

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

$$

SHORT TERM...30/39
LONG TERM....17
AVIATION...39