MESOSCALE DISCUSSION 0784
   NWS STORM PREDICTION CENTER NORMAN OK
   0736 AM CDT SAT MAY 03 2008
   
   AREAS AFFECTED...SE LA...SRN MS AND SRN AL
   
   CONCERNING...TORNADO WATCH 258...
   
   VALID 031236Z - 031330Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 258 CONTINUES.
   
   THE SEVERE THREAT WILL PERSIST THIS MORNING ACROSS SE LA...SRN MS
   AND SRN AL AS A LINEAR MCS MOVES SEWD. LARGE HAIL AND DAMAGING WINDS
   WILL BE THE PRIMARY THREATS ALTHOUGH A TORNADO REMAINS POSSIBLE WITH
   ROTATING CELLS EMBEDDED IN THE LINE.
   
   SFC ANALYSIS SHOW A PREFRONTAL TROUGH OVER WRN TN AND MS WITH A
   PRONOUNCED MOIST AXIS EXTENDING NWD ACROSS WRN AL WITH DEWPOINTS IN
   THE MID 60S F. THE LINEAR MCS IS LOCATED ALONG AND JUST EAST OF A
   35-45 KT LOW-LEVEL JET. THIS COMBINED WITH MODERATE INSTABILITY
   LOCATED ACROSS MUCH OF WW 258 AND INCREASING LARGE-SCALE ASCENT
   ASSOCIATED WITH AN THE SRN EXTENSION OF AN UPPER-LEVEL TROUGH
   LOCATED ALONG THE MS RIVER IS SUPPORTING THE SQUALL-LINE. REGIONAL
   WSR-88D VWPS SHOW ADEQUATE DEEP LAYER SHEAR AND STRONG BOUNDARY
   LAYER FLOW ASSOCIATED WITH THE LOW-LEVEL JET TO CONTINUE A THREAT
   FOR WIND DAMAGE. ALTHOUGH THE LOW-LEVEL SHEAR IS FORECAST TO
   GRADUALLY WEAKEN LATE THIS MORNING...AN ISOLATED TORNADO THREAT MAY
   PERSIST FOR A FEW MORE HOURS.
   
   ..BROYLES.. 05/03/2008
   
   
   ATTN...WFO...MOB...JAN...LIX...LCH...
   
   29468938 29549001 29539062 29699102 29859131 30079180
   30239165 30369093 30648982 31148930 31378860 30888818
   30398810 30078826 29748870 29398893