MESOSCALE DISCUSSION 0348
   NWS STORM PREDICTION CENTER NORMAN OK
   1044 PM CDT SAT MAR 30 2013
   
   AREAS AFFECTED...ERN OK...WRN AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 69...
   
   VALID 310344Z - 310515Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 69
   CONTINUES.
   
   SUMMARY...PRIMARY THREAT OF SEVERE HAIL SHOULD PERSIST NEXT FEW
   HOURS AS CORRIDOR OF GREATEST RISK MAKES SLOW E/SEWD PROGRESS. A
   DOWNSTREAM WW IS NOT ANTICIPATED ATTM.
   
   DISCUSSION...GREATEST SUPERCELL RISK SHOULD REMAIN CONFINED ACROSS
   THE SW TO CNTRL PORTIONS OF WW 69 INTO EARLY MORNING GIVEN THE
   PREDOMINANT FEED OF MODEST LOW-LEVEL W/SWLYS SUPPORTING WAA ATOP
   REMNANT OUTFLOW IN THE WAKE OF SAT MORNING CONVECTION. SURFACE
   TEMPERATURES HAVE COOLED INTO THE 50S TO LOWER 60S ACROSS MUCH OF
   AR...SUGGESTING HAIL POTENTIAL WILL BE INCREASINGLY MARGINAL WITH
   ERN EXTENT INTO AR ESPECIALLY GIVEN THE DEARTH OF INSTABILITY NOTED
   IN THE 00Z LZK RAOB. FARTHER WEST...FETCH OF STEEP MID-LEVEL LAPSE
   RATES /AS SAMPLED BY 00Z LMN RAOB/ AMIDST 30-40 KT EFFECTIVE SHEAR
   WILL CONTINUE TO SUSTAIN SUPERCELLS PRODUCING SEVERE HAIL FOR AT
   LEAST A FEW MORE HOURS. BUT WITH CONTINUED NOCTURNAL SURFACE COOLING
   AND A RELATIVELY WEAK LLJ...OVERALL INTENSITY HAS LIKELY PEAKED AND
   SHOULD GRADUALLY DIMINISH WITH TIME.
   
   ..GRAMS.. 03/31/2013
   
   
   ATTN...WFO...LZK...SHV...TSA...OUN...
   
   LAT...LON   33999533 34519634 34949625 36039500 36209354 35929284
               35259301 34499405 33999533