MESOSCALE DISCUSSION 0632
   NWS STORM PREDICTION CENTER NORMAN OK
   0215 AM CDT FRI APR 11 2008
   
   AREAS AFFECTED...PARTS OF CNTRL/ERN KY INTO MIDDLE TN
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 110715Z - 110915Z
   
   POTENTIAL FOR SPORADIC DAMAGING WIND GUSTS CONTINUES WITH A SLOWLY
   WEAKENING CONVECTIVE LINE.  BUT...THE NEED FOR A WW IS NOT CURRENTLY
   ANTICIPATED.
   
   A NARROW ZONE OF DIFLUENT/DIVERGENT UPPER FLOW...EAST OF CLOSED
   LOW/UPPER TROUGH SLOWLY SHIFTING EASTWARD THROUGH THE MISSISSIPPI
   VALLEY...CONTINUES TO SUPPORT A BAND OF THUNDERSTORMS ALONG A PRE-
   FRONTAL LOW-LEVEL CONFLUENT ZONE ACROSS THE TENNESSEE/LOWER OHIO
   VALLEYS.  THIS IS NEAR A 60-70 KT SOUTHERLY 850 JET CORE...WHICH IS
   PROGGED TO WEAKEN AS IT SHIFTS WITH UPPER FORCING...TOWARD THE UPPER
   OHIO VALLEY LATE TONIGHT.
   
   DEEP LAYER SHEAR IS STRONG...AS IS  MEAN CLOUD BEARING LAYER FLOW. 
   AND...THIS IS CONTRIBUTING TO RAPID NORTHEASTERLY MOTIONS...IN
   EXCESS OF 50 KTS...OF SEGMENTS WITHIN LINE...WHICH WILL PROGRESS
   MORE SLOWLY EASTWARD ACROSS MIDDLE TENNESSEE AND PARTS OF
   CENTRAL/EASTERN KENTUCKY BETWEEN NOW AND 10-11Z.  HOWEVER...THE
   BOUNDARY LAYER...WHERE POTENTIAL STORM INFLOW IS
   STRONGEST...NORTHEAST OF NASHVILLE INTO THE BLUE GRASS AND
   COALFIELDS OF KENTUCKY REMAINS RATHER DRY.  AND...WHILE AN ELEVATED
   MOISTURE RETURN IS OCCURRING TO THIS REGION...STORM- RELATIVE INFLOW
   AT THESE LEVELS IS MUCH WEAKER...AND GENERAL WEAKENING TRENDS TO
   CONVECTION ARE EXPECTED TO CONTINUE.  ACCESS TO BETTER
   MOISTURE/INSTABILITY SEEMS LIKELY TO REMAIN CONFINED TO AREAS
   NEAR/SOUTHWEST THROUGH SOUTH OF NASHVILLE...WHERE STORMS SHOULD BE
   SLOWEST TO WEAKEN LATE TONIGHT.
   
   ..KERR.. 04/11/2008
   
   
   ATTN...WFO...RLX...MRX...JKL...ILN...LMK...OHX...HUN...MEG...
   
   35428812 36058718 36708660 37348618 38158553 38768482
   38878405 38558322 37808302 36728415 35708546 35168619
   34868775 35088823