MESOSCALE DISCUSSION 0007
   NWS STORM PREDICTION CENTER NORMAN OK
   0736 AM CST THU JAN 10 2013
   
   AREAS AFFECTED...SOUTHEAST LA/SOUTHERN MS
   
   CONCERNING...TORNADO WATCH 1...2...
   
   VALID 101336Z - 101500Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 1...2...CONTINUES.
   
   SUMMARY...TORNADO WATCH 2 CONTINUES UNTIL 20Z...WITH ISOLATED
   TORNADO/DAMAGING WIND POTENTIAL THROUGH THE MORNING ACROSS SOUTHEAST
   LA AND SOUTHERN MS. SEVERE POTENTIAL CONTINUES TO SHIFT EASTWARD OUT
   OF TORNADO WATCH 1.
   
   DISCUSSION...AN ENE-MOVING SQUALL LINE EXTENDS ROUGHLY NORTH-SOUTH
   FROM THE SOUTHWEST CORNER OF MS NEAR NATCHEZ SOUTHWARD TO NEAR THE
   BATON ROUGE AND HOUMA AREAS OF LA AS OF 1315Z. THIS QLCS HAS BECOME
   INCREASINGLY ORGANIZED OVER THE PAST 1-2 HOURS WITH STRONG PRESSURE
   RISES NOTED ACROSS COASTAL SOUTH-CENTRAL LA IN ASSOCIATION WITH AN
   INCREASINGLY PREVALENT COLD POOL. EMBEDDED TRANSIENT
   CIRCULATIONS/LEWP STRUCTURES HAVE BEEN COMMON WITHIN THE LINE...AND
   THIS WILL LIKELY REMAIN THE CASE THROUGH THE MORNING WITHIN A
   MOIST/SHEARED LOW-LEVEL ENVIRONMENT. 
   
   UPPER 60S TO NEAR 70 F SURFACE DEWPOINTS ARE PREVALENT AHEAD OF THE
   QLCS ACROSS SOUTHEAST LA AND THE SOUTHERN THIRD OF MS...WHICH IS
   CONTRIBUTING TO AS MUCH AS 250-750 J/KG OF MLCAPE AS PER 12Z
   OBSERVED SOUNDINGS FROM NEW ORLEANS/JACKSON MS. CURVING HODOGRAPHS
   WITHIN THE LOWEST 1-2 KM BENEATH MODERATE SOUTHERLY WINDS PER THESE
   SAME SOUNDINGS AND WSR-88D VWP DATA SUGGEST AROUND 250-350 M2/S2 OF
   0-1 KM SRH. PRIMARY SHORT-TERM THREAT WILL LIKELY EXIST ACROSS
   SOUTHEAST LA EARLY THIS MORNING...ALTHOUGH SEVERE POTENTIAL SHOULD
   INCREASE NORTH-NORTHEASTWARD ACROSS MORE OF SOUTHERN MS BY LATE
   MORNING AS ADDITIONAL LOW-LEVEL MOISTENING/DIURNAL HEATING
   OCCURS...AND GIVEN THAT LOW-LEVEL WINDS MAY FURTHER STRENGTHEN
   DURING THE DAY.
   
   ..GUYER.. 01/10/2013
   
   
   ATTN...WFO...JAN...LIX...LCH...
   
   LAT...LON   30889145 31639155 32269034 31928906 30188974 28968995
               29109131 29939123 30889145