MESOSCALE DISCUSSION 0158
   NWS STORM PREDICTION CENTER NORMAN OK
   0128 AM CST FRI FEB 27 2009
   
   AREAS AFFECTED...WRN/CNTRL KY AND FAR SRN IND
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 270728Z - 270900Z
   
   PRE-FRONTAL TSTMS HAVE EVOLVED INTO SHORT LINE SEGMENTS AND
   INCREASED IN INTENSITY EARLY THIS MORNING WITH SEVERAL EMBEDDED
   CELLS EXHIBITING SMALL SCALE BOWING FEATURES.  THE RECENT UPSWING IN
   ACTIVITY APPEARS TO BE OCCURRING AS UPR JET ATTENDANT TO THE WI UPR
   LOW TRANSLATES INTO THE LWR OH VLY.
   
   DOWNSTREAM AIR MASS WAS NOT PARTICULARLY UNSTABLE...BUT RUC SOUNDING
   MODIFIED FOR OBSERVED BOUNDARY LAYER CONDITIONS SUGGEST AROUND 200 J
   PER KG MLCAPE AND A MODEST PROBABILITY FOR SFC-BASED PARCEL
   INGESTION.  WIND PROFILES ACROSS WRN/CNTRL KY AND FAR SRN IND
   EXHIBIT CONSIDERABLE VEERING WITH HEIGHT WITH SFC-1KM SRH OF 400+
   M2/S2.  THOUGH CONVECTIVE MODE WOULD TEND TO FAVOR DMGG
   WIND/HAIL...ESPECIALLY WITH THE INCREASING LINEAR DEEP-LAYER
   FORCING.. ISOLD TORNADOES CANNOT BE RULED OUT.
   
   WILL CONTINUE TO MONITOR EVOLUTION OF ACTIVITY.  A WW MAY BE
   REQUIRED IF ACTIVITY MAINTAINS INTEGRITY ACROSS THE LWR OH VLY.
   
   ..RACY.. 02/27/2009
   
   
   ATTN...WFO...LMK...OHX...PAH...
   
   LAT...LON   36508875 38608635 38648533 37908488 36698570 36688739
               36508875