MESOSCALE DISCUSSION 1445
   NWS STORM PREDICTION CENTER NORMAN OK
   0436 PM CDT SUN JUL 05 2009
   
   AREAS AFFECTED...ERN TX AND PARTS OF WRN LA
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 052136Z - 052200Z
   
   CORRECTED TO ADD WRN LA TO FIRST SENTENCE
   
   WW ISSUANCE IS POSSIBLE ACROSS PARTS OF ERN TX AND WRN LA.
   
   REGIONAL RADARS INDICATED A CLUSTER OF STRONG TO SEVERE STORMS HAD
   FORMED TO THE WEST OF PALESTINE TX...AT THE INTERSECTION OF TWO
   OUTFLOW BOUNDARIES ACROSS THIS REGION.  ONE OF THE BOUNDARIES
   EXTENDS EWD INTO CENTRAL LA...WHILE THE OTHER BOUNDARY EXTENDED SWWD
   THROUGH CENTRAL TX TO THE HILL COUNTRY/EDWARDS PLATEAU.  ALTHOUGH
   MID LEVEL LAPSE RATES ARE WEAK...A VERY MOIST AIR MASS /PWAT VALUES
   UP TO 2 INCHES AND SURFACE DEWPOINTS IN THE LOWER-MID 70S/ AND
   SURFACE HEATING HAVE RESULTED IN VERY STRONG INSTABILITY.  FORCING
   FOR ASCENT ATTENDANT TO A WEAK MID LEVEL IMPULSE TRACKING EWD ACROSS
   NERN TX IS LIKELY AIDING IN TSTM DEVELOPMENT...ESPECIALLY WITH THE
   RECENT TSTM DEVELOPMENT NEAR AND N OF TYLER TX.  STEEP LOW LEVEL
   LAPSE RATES WILL PROMOTE A DAMAGING WIND THREAT...WITH HEAVY
   RAINFALL RATES ALSO POSSIBLE GIVEN THE HIGH MOISTURE CONTENT IN THIS
   REGION.
   
   ..PETERS.. 07/05/2009
   
   
   ATTN...WFO...LCH...SHV...HGX...FWD...
   
   LAT...LON   31249710 32109627 33019498 33009430 32699303 31699253
               31149260 30869352 30929657 31249710