865 
ACUS11 KWNS 111721
SWOMCD
SPC MCD 111720 
GAZ000-ALZ000-FLZ000-MSZ000-LAZ000-111915-

MESOSCALE DISCUSSION 0944
NWS STORM PREDICTION CENTER NORMAN OK
1220 PM CDT SUN MAY 11 2003

AREAS AFFECTED...SERN LA....SRN MS...SRN AND CENTRAL AL/GA...FAR
NWRN FL

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 111720Z - 111915Z

LARGE SCALE FORCING HAS INCREASED OVER THE AREA AHEAD OF ADVANCING
SHORTWAVE TROUGH MOVING OUT OF TX PER WV IMAGERY. A SUBTLE UPPER
LEVEL SPEED MAX APPEARS TO BE MOVING ACROSS LA AHEAD OF THE TROUGH
AND HAS AIDED IN CONVECTIVE DEVELOPMENT OVER CENTRAL LA. AN OUTFLOW
BOUNDARY EXTENDING FROM 30 S OF MEI ENEWD TO 40 S OF FFC AS OF 17Z.
EXPECT ADDITIONAL STRONG TO SEVERE CONVECTIVE DEVELOPMENT ALONG THIS
BOUNDARY OVER THE NEXT FEW HOURS...AS INHIBITION IS WEAKENING. 35 TO
40 KTS OF SFC-6 KM SHEAR ALONG WITH MODERATE INSTABILITY /2000 J/KG
OF MLCAPE/ WILL FAVOR THE POTENTIAL FOR LARGE HAIL. IF ADDITIONAL
EARLY MORNING ELEVATED CONVECTION CAN ACCELERATE AND MOVE INTO THE
WARM SECTOR A DAMAGING WIND THREAT WILL INCREASE..ESPECIALLY OVER
ERN AL INTO CENTRAL GA.

A WW MAY BE NEEDED FOR THIS AREA IN THE NEXT HOUR.

..CROSBIE.. 05/11/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...CHS...JAX...FFC...TAE...BMX...MOB...JAN...LIX...

29738959 30329134 31249017 33258385 31778202 31058552