MESOSCALE DISCUSSION 0967
   NWS STORM PREDICTION CENTER NORMAN OK
   0556 PM CDT WED MAY 25 2011
   
   AREAS AFFECTED...ERN AR/WRN TN/NRN MS
   
   CONCERNING...TORNADO WATCH 371...
   
   VALID 252256Z - 260000Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 371 CONTINUES.
   
   A THREAT OF LONG-TRACKED...STRONG TORNADOES IS PERSISTING OVER
   PORTIONS OF ERN AR...PROGRESSING ENEWD INTO WRN TN AND NRN
   MS...WHILE RIGHT-SPLITS WILL PROGRESS DUE EAST.
   
   A SERIES OF DISCRETE SUPERCELLS ARE PERSISTING AHEAD OF AN EFFECTIVE
   DRYLINE/FRONTAL MERGER EXTENDING FROM A SURFACE LOW IN NERN MO...SWD
   THROUGH ERN AR...AND SWWD THROUGH TX. GIVEN THE EXPANSIVE WARM
   SECTOR CHARACTERIZED BY MID TO UPPER 80S TEMPERATURES IN CONJUNCTION
   WITH UPPER 60S DEW POINTS...THE ORIENTATION OF A STRONG SLY LOW
   LEVEL JET /50 KTS AT 1 KFT AT MEMPHIS VAD/ PERSISTING AFTER SUNSET
   WILL MAINTAIN AN INFLUX OF HIGHER THETA-E AIR. THIS WILL ALLOW
   DANGEROUS STORMS TO CONTINUE. DEEP LAYER SHEAR VECTORS ORTHOGONAL TO
   THE AFOREMENTIONED SURFACE BOUNDARIES AND SUBSTANTIALLY VEERING
   WINDS WITH HEIGHT WILL REMAIN CONDUCIVE TO DISCRETE SUPERCELLS
   CAPABLE OF PRODUCING LONG-TRACKED/STRONG TORNADOES.
   
   ..HURLBUT.. 05/25/2011
   
   
   ATTN...WFO...OHX...PAH...MEG...JAN...LZK...
   
   LAT...LON   34188823 34009200 34399189 35659075 36359051 36538903
               36498816 34188823