SWOMCD
SPC MCD 142153
SCZ000-GAZ000-FLZ000-142330-
MESOSCALE DISCUSSION 0493
NWS STORM PREDICTION CENTER NORMAN OK
0453 PM CDT SAT APR 14 2007
AREAS AFFECTED...SERN GA INTO SRN SC
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 142153Z - 142330Z
SEVERE STORM POTENTIAL IS EXPECTED TO INCREASE THROUGH THE EVENING E
OF WW 142 AND AN ADDITIONAL WW MAY BECOME NECESSARY.
CLUSTERS OF TSTMS HAVE RECENTLY DEVELOPED FROM THE VICINITY OF VDI
SWD TO SSE OF AYS...APPARENTLY FORCED BY CONVERGENCE ALONG NW-SE
ORIENTED WARM FRONT AND MORE N-S ORIENTED CONFLUENCE ZONE. AIR MASS
S OF WARM FRONT AND W OF CONFLUENCE ZONE OVER S-CNTRL GA HAS BECOME
QUITE WARM WITH TEMPERATURES OF 85-90 F...ALSO LIKELY CONTRIBUTED TO
THIS STORM DEVELOPMENT. WHILE PRIMARY LOW-LEVEL MOISTURE AXIS
REMAINS TO THE W...DEWPOINTS ARE BEING TO INCREASE FROM OFF THE
ATLANTIC OWING TO STRENGTHENING SELY LOW-LEVEL FLOW. AS A
RESULT...AIR MASS HAS BECOME WEAKLY TO MODERATELY UNSTABLE WITH
SBCAPES OF 500-1000 J/KG.
STRENGTHENING SWLY LLJ THIS EVENING (00-03Z TIMEFRAME) SHOULD: 1)
SERVE TO ENHANCE INFLUX OF RICHER BOUNDARY LAYER MOISTURE AND
RESULTANT INSTABILITY INTO REGION...AND 2) AUGMENT BACKGROUND
LARGE-SCALE FORCING VIA WAA AND ISENTROPIC ASCENT. PRIOR TO THIS
TIME...STORMS MAY TEND TO REMAIN MORE ISOLATED OR IN SMALL CLUSTERS
WITH SOME THREAT OF LOCALLY DAMAGING WINDS AND PERHAPS A TORNADO OR
TWO GIVEN THE FAVORABLE SHEAR PROFILES ALREADY IN PLACE.
.MEAD.. 04/14/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CHS...JAX...FFC...
32318218 32678181 32908150 32678106 32148085 31328104
30828132 30568159 30598194 30888222 31338240
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