MESOSCALE DISCUSSION 1348
   NWS STORM PREDICTION CENTER NORMAN OK
   0659 PM CDT TUE JUN 21 2011
   
   AREAS AFFECTED...SERN TX...FAR WRN LA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 534...
   
   VALID 212359Z - 220100Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 534
   CONTINUES.
   
   SWD-MOVING TSTM CLUSTER ACROSS ERN TX WILL LIKELY SHIFT INTO SERN
   TX/FAR WRN LA WITH ATTENDANT THREAT FOR WET MICROBURSTS AND
   MARGINALLY SEVERE HAIL. A DOWNSTREAM SEVERE TSTM WATCH IS BEING
   CONSIDERED.
   
   MOST INTENSE MID-LEVEL REFLECTIVITY EXISTS ACROSS SAN AUGUSTINE
   COUNTY AS OF 2350Z WITHIN BROADER SWD-MOVING TSTM COMPLEX ACROSS ERN
   TX. CONTINUAL REDEVELOPMENT HAS BEEN OBSERVED ALONG THE WRN PORTION
   OF ASSOCIATED OUTFLOW BOUNDARY...AIDING IN PERSISTENT AMALGAMATION
   OF CELLS. DOWNSTREAM AIR MASS REMAINS VERY UNSTABLE WITH MLCAPE OF
   2500 TO 3500 J/KG. HOWEVER...DEEP-LAYER SHEAR WEAKENS WITH SRN
   EXTENT AND IS NOT EXPECTED TO STRENGTHEN. BUT GIVEN 30-35 KT WLYS
   SAMPLED AT 6-8 KM AGL IN PALESTINE TX PROFILER...ORGANIZED
   MULTICELLULAR STRUCTURES SHOULD PERSIST INTO PARTS OF SERN TX AND
   PERHAPS FAR WRN LA FOR THE NEXT FEW HOURS.
   
   ..GRAMS.. 06/21/2011
   
   
   ATTN...WFO...LCH...SHV...HGX...FWD...
   
   LAT...LON   31739359 31199327 30709322 30229346 30029417 29999491
               30489533 31119567 31549570 31839549 31919501 31909413
               31739359