FXUS62 KFFC 042217 AAA
AFDFFC
AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
520 PM EST FRI DEC 4 2009
.SHORT TERM /TONIGHT THROUGH SUNDAY NIGHT/...
AN UPPER LEVEL TROUGH DIPPING INTO WEST TEXAS WILL RACE EAST
ACROSS THE SOUTHERN STATES TONIGHT REACHING GEORGIA SATURDAY
MORNING. SURFACE LOW PRESSURE OVER THE CENTRAL GULF OF MEXICO IN
RESPONSE TO THIS TROUGH WILL SPREAD PRECIPITATION ACROSS AL/FL/GA
AND THE CAROLINAS TONIGHT AND SATURDAY. COLD AIR ADVECTION WILL
BRING 850 MB TEMPS DOWN TO ZERO TO MINUS 4 DEG C BY SATURDAY
MORNING OVER MUCH OF NORTH GEORGIA...NORTHWEST OF INTERSTATE
85. THE FORECAST SOUNDINGS SHOW A MIX OF RAIN...SLEET AND SNOW
AFTER MIDNIGHT THROUGH SATURDAY MORNING. THE PRECIPITATION TYPE
SHOULD BE PREDOMINANTLY SNOW OVER THE NORTH GA MOUNTAINS WHERE
TEMPERATURES (SURFACE&ALOFT) SHOULD BE COLD TO ENOUGH TO ALLOW
SOME ACCUMULATIONS. THIS MORNINGS NAM AND SREF MODEL RUNS ARE MORE
CONSISTENT WITH EACH OTHER NOW...WHILE THE GFS REMAINS THE WETTEST
WITH THE MOST SNOW ACCUMULATION. BEST BET IS TO REMAIN WITH
CURRENT THINKING THAT AN INCH OR TWO WILL BE POSSIBLE IN THE NORTH
GA MOUNTAINS AND LESS THAN ONE HALF ACCUMULATION ELSEWHERE IN THE
ADVISORY AREA...WHICH IS GENERALLY NORTH OF A CARROLLTON THROUGH
MARIETTA AND DAWSONVILLE TO CLEVELAND LINE. THE RAIN...SLEET AND
SNOW WILL END SATURDAY MORNING ...BUT THE LIGHT SNOW MAY LINGER
INTO EARLY SATURDAY AFTERNOON OVER THE NORTHEAST GA. HIGH PRESSURE
BUILDING IN FROM THE WEST LATE SATURDAY WILL ALLOW SKIES TO CLEAR
AND WINDS TO DROP OFF...BRINGING OPTIMAL RADIATIONAL COOLING
SATURDAY NIGHT. THE HIGH WILL SLIDE EAST OF GEORGIA ON SUNDAY. A
MET/MAV MOS BLEND WAS GENERALLY USED FOR TEMPS AND POPS.
.LONG TERM /MONDAY THROUGH FRIDAY/...
THE UPPER LEVEL PATTERN BECOMES MORE ZONAL ACROSS THE EASTERN
U.S. EARLY NEXT WEEK ALLOWING A FEW WEAK SYSTEMS TO PUSH THROUGH
THE LOCAL AREA WITH OUR AIRMASS GRADUALLY WARMING AND MOISTENING.
AN UPPER TROUGH DIGGING INTO THE WESTERN STATES ON MONDAY/TUESDAY
WILL SPAWN A POWERFUL 970 MB SURFACE LOW WHICH TRACKS FROM THE
CENTRAL PLAINS TO THE GREAT LAKES BY WEDNESDAY...AS AN ASSOCIATED
COLD FRONT SURGES THROUGH GEORGIA. PRIOR TO THAT FRONTAL PASSAGE
THOUGH...APPEARS TO BE A RATHER EXTENDED PERIOD OF RAIN /POSSIBLY
HEAVY/ TUESDAY INTO WEDNESDAY.
&&
.AVIATION...
MVFR CEILINGS DEVELOPING BETWEEN 04Z AND 06Z AREAWIDE. IFR CEILINGS
EXPECTED ACROSS CENTRAL AND EAST GEORGIA BY 10Z. PRECIPITATION WILL
SPREAD NORTH BETWEEN 00Z AND 06Z...BUT SHOULD REMAIN RELATIVELY
LIGHT. RAIN MAY BECOME MIXED WITH SNOW BETWEEN 10Z AND 14Z AT
KATL...KFTY...KPDK...KRYY AND KAHN. VFR CONDITIONS WILL SPREAD FROM
NORTHWEST TO SOUTHEAST ACROSS THE FORECAST AREA BETWEEN 18Z AND 00Z.
&&
.PRELIMINARY POINT TEMPS/POPS...
ATHENS 41 47 27 54 35 / 90 40 0 0 10
ATLANTA 36 43 28 54 37 / 90 20 0 0 20
BLAIRSVILLE 34 38 23 49 32 / 100 50 0 0 10
CARTERSVILLE 33 40 24 52 33 / 90 20 0 0 20
COLUMBUS 38 50 28 56 38 / 100 5 0 0 20
GAINESVILLE 37 44 28 50 35 / 90 40 0 0 10
MACON 40 52 27 58 37 / 90 20 0 0 10
ROME 35 44 24 53 33 / 90 40 0 0 20
PEACHTREE CITY 35 45 23 53 32 / 90 10 0 0 20
VIDALIA 42 54 30 57 40 / 80 30 0 0 10
&&
.FFC WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY FROM 1 AM TO 10 AM EST SATURDAY FOR THE
FOLLOWING ZONES: BARTOW...CARROLL...CATOOSA...CHATTOOGA...
CHEROKEE...COBB...DADE...DAWSON...DOUGLAS...FANNIN...FLOYD...
GILMER...GORDON...HARALSON...LUMPKIN...MURRAY...PAULDING...
PICKENS...POLK...TOWNS...UNION...WALKER...WHITE...WHITFIELD.
&&
$$
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