SWOMCD
SPC MCD 121610
ALZ000-FLZ000-MSZ000-LAZ000-121815-
MESOSCALE DISCUSSION 2077
NWS STORM PREDICTION CENTER NORMAN OK
1110 AM CDT TUE AUG 12 2008
AREAS AFFECTED...SRN LA/SRN MS/SWRN AL
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 121610Z - 121815Z
THREAT FOR ISOLATED/SHORT-LIVED TORNADOES WILL INCREASE THROUGH THE
AFTERNOON...WITH POTENTIAL POSSIBLY JUSTIFYING WW ISSUANCE IN THE
NEXT 1-2 HOURS.
WIDESPREAD SHOWERS AND THUNDERSTORMS ARE ONGOING ATTM ACROSS THE
ENTIRE GULF COAST REGION...AHEAD OF WEAK CIRCULATION CENTER ALOFT
SHIFTING SLOWLY EWD ACROSS E TX. BOUNDARY-LAYER AIRMASS REMAINS
VERY MOIST...WITH MID 70S DEWPOINTS ACROSS THIS REGION. WHILE
FAIRLY WIDESPREAD CLOUDINESS AND WARM MID-LEVEL TEMPERATURES/WEAK
LAPSE RATES WILL LIMIT OVERALL POTENTIAL FOR FURTHER
DESTABILIZATION...SUFFICIENT CAPE EXISTS FOR CONTINUED CONVECTIVE
REDEVELOPMENT.
DEEP-LAYER SHEAR IS NOT PARTICULARLY STRONG...BUT SPEED SHEAR --
PARTICULARLY IN THE LOWEST COUPLE OF KM -- IS SUFFICIENT FOR SOME
STORM ORGANIZATION/LOW-LEVEL ROTATION. GIVEN LOW LCLS AND DEGREE OF
LOW-LEVEL SHEAR...A FEW BRIEF TORNADOES WILL LIKELY OCCUR ACROSS THE
GULF COAST REGION -- MAINLY FROM SRN LA EWD TO SWRN AL THROUGH EARLY
TO MID AFTERNOON.
..GOSS.. 08/12/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MOB...JAN...LIX...LCH...
29689375 30359338 31249169 31788921 31548768 30448732
28908884 28919073
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