ZCZC SPCSWOMCD ALL ACUS11 KWNS 312048 SPC MCD 312048 KYZ000-TNZ000-312215- MESOSCALE DISCUSSION 0310 NWS STORM PREDICTION CENTER NORMAN OK 0348 PM CDT THU MAR 31 2016 AREAS AFFECTED...PORTIONS OF S-CNTRL KY AND MIDDLE TN CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE VALID 312048Z - 312215Z PROBABILITY OF WATCH ISSUANCE...60 PERCENT SUMMARY...SEVERE RISK...WITH ALL HAZARDS POSSIBLE INCLUDING ISOLATED TORNADOES...WILL INCREASE OVER THE NEXT SEVERAL HOURS. WW ISSUANCE POSSIBLE IN THE SHORT TERM. DISCUSSION...LINEAR CONVECTION IN SWRN TN CURRENTLY POSES MAINLY A DAMAGING WIND RISK AS IT PROGRESSES EWD AROUND 35-40 KT. THE AIRMASS ACROSS MUCH OF MIDDLE TN INTO NWRN AL IS WEAKLY UNSTABLE...WITH MLCAPE UP TO 500 J/KG PER RECENT RAP MESOANALYSIS. A RESIDUAL OUTFLOW BOUNDARY FROM PRIOR CONVECTION TO THE S OF THE MCD AREA HAS LIMITED MORE ROBUST MOISTURE RETURN SO FAR...AND WITH WIDESPREAD CLOUDINESS PRESENT PER VISIBLE SATELLITE IMAGERY...THE PROSPECT FOR ADDITIONAL DESTABILIZATION THIS AFTERNOON REMAINS LIMITED. REGARDLESS...STRONG EFFECTIVE BULK SHEAR AROUND 50 KT WILL CONTINUE TO SUPPORT STORM ORGANIZATION. ..GLEASON/THOMPSON.. 03/31/2016 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LMK...OHX...HUN...PAH... LAT...LON 35808791 36218769 36508726 36718702 37008693 37088661 36928614 36518640 35268661 35028684 35028793 35808791 NNNN