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Mesoscale Discussion 349
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   MESOSCALE DISCUSSION 0349
   NWS STORM PREDICTION CENTER NORMAN OK
   0434 AM CDT MON APR 14 2014

   AREAS AFFECTED...NERN LA AND CENTRAL MS

   CONCERNING...TORNADO WATCH 79...

   VALID 140934Z - 141030Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 79 CONTINUES.

   SUMMARY...LOCALLY STRONG WIND GUSTS AND A TORNADO THREAT PERSIST
   ACROSS THE SERN PORTION OF WW 79 DURING THE PRE-DAWN HOURS EARLY
   THIS MORNING.

   DISCUSSION...AT 0920Z...REGIONAL RADAR IMAGERY SHOWED A LINE OF
   STORMS IN CENTRAL MS EXTENDING FROM SRN WINSTON TO NRN HINDS
   COUNTIES... WITH THIS ACTIVITY MOVING ESEWD AT 35-40 KT. 
   MEANWHILE...RADAR IMAGERY AND A DIMINISHING TREND IN LIGHTNING DATA
   INDICATED THE SQUALL LINE THAT MOVED E/SEWD ACROSS THE MID SOUTH HAS
   WEAKENED...WITH THE ATTENDANT CONVECTIVE OUTFLOW APPROACHING THE
   AFOREMENTIONED BAND OF STORMS IN CENTRAL MS.  LOW-LEVEL AND DEEP
   LAYER SHEAR HAS INCREASED GIVEN A 60 KT SSWLY LLJ BENEATH A 60 KT
   SWLY 500 MB JET PER JAN WSR-88D VAD...WITH SFC-1 KM SHEAR EXCEEDING
   40 KT.  WEAKER INSTABILITY OVER CENTRAL MS /MUCAPE AOB 500 J PER KG/
   MAY BE TENDING TO LIMIT THE POTENTIAL FOR MORE ROBUST/SUSTAINED AND
   ORGANIZED STORMS.  HOWEVER...TRENDS WILL CONTINUE TO BE MONITORED AS
   THE OUTFLOW BOUNDARY MERGES WITH AND POTENTIALLY ENHANCES UPDRAFTS. 
   THUS...AVAILABLE KINEMATICS SUGGEST LOCALLY STRONG WIND GUSTS AND/OR
   A TORNADO CANNOT BE RULED OUT.

   ..PETERS.. 04/14/2014


   ATTN...WFO...JAN...SHV...

   LAT...LON   32549185 32589091 32949046 32978988 32898930 32798914
               32418909 32268927 31978985 31739076 31749147 31889181
               32239192 32549185 

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Page last modified: April 14, 2014
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