SWOMCD
SPC MCD 312300
SCZ000-GAZ000-ALZ000-010000-
MESOSCALE DISCUSSION 1519
NWS STORM PREDICTION CENTER NORMAN OK
0600 PM CDT SAT JUL 31 2010
AREAS AFFECTED...MUCH OF GA AND SC
CONCERNING...SEVERE THUNDERSTORM WATCH 552...
VALID 312300Z - 010000Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 552
CONTINUES.
MULTICELL STORM CLUSTERS CONTINUE TO MOVE SEWD ACROSS WW 552...SOME
WITH A HISTORY OF PRODUCING DAMAGING WIND GUSTS. AREA SURFACE
OBSERVATIONS INDICATE THAT THE AIR MASS IS SLOWLY BEGINNING TO COOL
AND STABILIZE...DUE TO CONVECTIVE OUTFLOW FROM WIDESPREAD
THUNDERSTORM COVERAGE...AS WELL AS DIURNAL COOLING TREND WITH THE
APPROACH OF SUNSET. HOWEVER...POCKETS OF HIGHER INSTABILITY STILL
EXIST...WITH LARGEST MLCAPE VALUES /UPWARDS OF 2500 J PER KG BASED
ON OBJECTIVE ANALYSIS GUIDANCE/ OVER E-CENTRAL GA. THIS INSTABILITY
COUPLED WITH SRN FRINGE OF STRONGER EFFECTIVE BULK SHEAR /30-40 KTS/
MAY AID IN A CONTINUED RISK FOR ISOLATED DAMAGING WIND GUSTS WITH
THE STRONGER UPDRAFT CORES. IN ADDITION...STRONGLY BACKED LOW-LEVEL
FLOW AND ENHANCED LOW-LEVEL VERTICAL WIND SHEAR IS OBSERVED OVER
SC...WHICH MAY LEAD TO BRIEF UPDRAFT ROTATION AND OCCASIONAL
SUPERCELL-LIKE STORM STRUCTURES. OTHERWISE...CONTINUED BOUNDARY
LAYER STABILIZATION DURING THE REMAINDER OF WW 552 SHOULD RESULT IN
A GRADUAL WEAKENING OF CONVECTION ACROSS THE AREA...AND WILL LIKELY
PRECLUDE THE NEED FOR ADDITIONAL WW/S.
..GARNER.. 07/31/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...CAE...GSP...JAX...FFC...HUN...
LAT...LON 34898595 34908189 31757823 31748214 34898595
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