MESOSCALE DISCUSSION 1700
   NWS STORM PREDICTION CENTER NORMAN OK
   0218 PM CDT TUE JUL 28 2009
   
   AREAS AFFECTED...CENTRAL LA
   
   CONCERNING...TORNADO WATCH 630...
   
   VALID 281918Z - 282015Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 630 CONTINUES.
   
   OBJECTIVE ANALYSES INDICATED STRONGER SWLY LLJ /40 KT/ HAS SHIFTED
   ENEWD AND AT 18Z EXTENDED FROM NERN LA TO NRN MS.  GIVEN THAT THE
   GREATER LOW LEVEL MASS CONVERGENCE HAS SHIFTED AWAY FROM NRN/
   CENTRAL LA...LOW LEVEL WAA ALONG AND S OF THE REMNANT MCS SHOULD
   REMAIN WEAK...BUT SUFFICIENT FOR ADDITIONAL STORMS WITHIN A
   MODERATELY UNSTABLE AIR MASS.
   
   DESPITE THE LIKELIHOOD FOR ADDITIONAL TSTM DEVELOPMENT ACROSS
   CENTRAL/SERN LA INTO SRN MS...WEAK LAPSE RATES AND WEAK DEEP LAYER
   SHEAR /PER SPECIAL JAN 18Z SOUNDING/ SUGGEST TSTM UPDRAFTS SHOULD
   CONTINUE TO STRUGGLE.  THUS...OVERALL SEVERE WEATHER THREAT SHOULD
   REMAIN LOW THIS AFTERNOON.
   
   ..PETERS.. 07/28/2009
   
   
   ATTN...WFO...JAN...LIX...LCH...SHV...
   
   LAT...LON   30989344 31409304 31749203 31749139 31709034 31478980
               30928983 30519039 30539145 30699281 30739341 30989344