MESOSCALE DISCUSSION 0559
   NWS STORM PREDICTION CENTER NORMAN OK
   0502 PM CDT FRI APR 04 2008
   
   AREAS AFFECTED...SERN LA/SRN MS/SRN AL/WRN FL PANHANDLE
   
   CONCERNING...TORNADO WATCH 164...
   
   VALID 042202Z - 042330Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 164 CONTINUES.
   
   SEVERE/ISOLATED TORNADO THREAT CONTINUES ACROSS PARTS OF WW 164. 
   WITH THIS WATCH SCHEDULED TO EXPIRE AT 04/23Z...NEW TORNADO WATCH
   WILL LIKELY BE REQUIRED FROM SERN LA ACROSS THE CENTRAL GULF COAST
   REGION.
   
   LATEST RADAR IMAGERY SHOWS STORM COVERAGE INCREASING NEAR AND S OF
   SEWD-MOVING COLD FRONT...WHICH NOW EXTENDS FROM A LOW OVER NERN AL
   SWWD ACROSS SERN MS AND INTO SWRN LA.  BOUNDARY LAYER REMAINS MOIST
   S OF THIS FRONT WITH DEWPOINTS GENERALLY IN THE 60S...WHICH IS
   CONTRIBUTING TO 500 TO 1500 J/KG MIXED-LAYER CAPE.
   
   WHILE STRONGEST DEEP-LAYER SHEAR SHOULD SHIFT GRADUALLY EWD WITH
   TIME AS THE LOW-LEVEL JET REDEVELOPS EWD INTO ERN AL/GA/THE
   CAROLINAS...50 TO 60 KT SWLY MID-LEVEL FLOW SHOULD PERSIST ACROSS
   THE CENTRAL GULF COAST/LOWER MS VALLEY REGION THROUGH THE
   EVENING...SUPPORTING A CONTINUED THREAT FOR ORGANIZED/SEVERE STORMS.
    WHILE GREATER TORNADO THREAT WILL LIKELY SHIFT EWD IN CONJUNCTION
   WITH THE LOW-LEVEL JET...HAIL AND LOCALLY-DAMAGING WINDS AND THE
   THREAT FOR AN ISOLATED TORNADO OR TWO -- ESPECIALLY OVER THE NEXT
   COUPLE OF HOURS -- WILL LIKELY NECESSITATE NEW WW ISSUANCE.
   
   ..GOSS.. 04/04/2008
   
   
   ATTN...WFO...FFC...TAE...BMX...MOB...JAN...LIX...LCH...
   
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