FXUS62 KCAE 221109
AFDCAE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
609 AM EST TUE DEC 22 2009

.SYNOPSIS...

HIGH PRESSURE WILL REMAIN OVER THE AREA TODAY. A LOW PRESSURE SYSTEM
WILL DEVELOP IN THE SOUTHERN PLAINS BY MIDWEEK AND BEGIN TO LIFT
TO THE NORTHEAST. THIS SYSTEM WILL PUSH A COLD FRONT TOWARDS OUR
AREA BY CHRISTMAS DAY.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

DRY HIGH PRESSURE REMAINS OVER THE AREA ONCE AGAIN TODAY. MOSTLY
SUNNY SKIES AND LIGHT WINDS WILL ALLOW TEMPS TO CLIMB INTO THE MID
50S IN MOST AREAS.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY/...

SURFACE HIGH PRESSURE WILL BEGIN TO BUILD ALONG THE EASTERN SLOPES
OF THE APPALACHIAN MOUNTAINS THROUGH WEDNESDAY AS LOW PRESSURE
DEVELOPS IN THE SOUTHERN PLAINS. GENERALLY PARTLY CLOUDY SKIES
THROUGH THE SHORT TERM WITH TEMPS CLOSE TO NORMAL. MODELS SHOWING
A LOW LEVEL WEDGE FLOW DEVELOPING INTO THURSDAY AHEAD OF THE NEXT
FRONTAL SYSTEM. CONFIDENCE REMAINS LOW...BUT BUT DID CONTINUE WITH
THE LOWER AFTERNOON TEMPS FOR THURSDAY BASED ON AN INCREASE IN
CLOUDS AND COOLER NORTHEASTERLY WINDS. SLIGHT CHANCE FOR RAIN WILL
BEGIN LATE THURSDAY AFTERNOON AHEAD OF THE NEXT SYSTEM.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...

MODELS CONTINUE TO INDICATE WEAK WEDGE FLOW CONTINUING THURSDAY
NIGHT NIGHT AS SFC LOW LIFTS INTO THE MID-MISSISSIPPI VALLEY
REGION. GUIDANCE HAS BEEN SLOWING THE SYSTEM DOWN THE PAST FEW
RUNS...AND TREND CONTINUES. HAVE BACKED OF TIMING SLIGHTLY...BUT
EVEN SO...RAIN SHOULD BE MOVING INTO THE REGION DURING THE
OVERNIGHT HOURS THURSDAY NIGHT. CHRISTMAS DAY STILL LOOKING WET AS
A COLD FRONT APPROACHES FROM THE WEST. DRY WEATHER MOVES IN FOR
THE WEEKEND AS HIGH PRESSURE BUILDS IN FROM THE WEST. TEMPS
OVERALL CLOSE TO NORMAL.

&&

.AVIATION /12Z TUESDAY THROUGH SATURDAY/...

HIGH PRESSURE WILL DOMINATE THROUGH THE PERIOD. SOME LIGHT FOG
HAS DEVELOPED AT AGS/OGB BUT IT HAS BEEN INTERMITTENT...SO WILL
CARRY AN HOUR OR SO OF MVFR VSBYS BUT OTHERWISE VFR CONDITIONS ARE
EXPECTED. WINDS SHOULD REMAIN LIGHT AND VARIABLE THROUGH THE 24
HOUR FORECAST PERIOD.
 
EXTENDED AVIATION OUTLOOK...MVFR CONDITIONS POSSIBLE LATE 
THURSDAY...THURSDAY NIGHT INTO FRIDAY AS A STORM SYSTEM MOVES 
THROUGH THE MIDWEST AND DRAGS A COLD FRONT TOWARD THE REGION.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...NONE.
GA...NONE.

&&

$$

AVIATION...HC