MESOSCALE DISCUSSION 0174
   NWS STORM PREDICTION CENTER NORMAN OK
   0202 AM CST WED FEB 06 2008
   
   AREAS AFFECTED...PORTIONS SRN OH...CENTRAL/WRN WV...EXTREME SWRN
   PA...ERN KY...EXTREME SWRN WV.
   
   CONCERNING...TORNADO WATCH 42...
   
   VALID 060802Z - 060915Z
   
   CORRECTED FOR HEADLINE ERROR
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 42 CONTINUES.
   
   WELL-DEVELOPED/MATURE BLOW ECHO IS EVIDENT AS OF 745Z OVER ERN
   KY...MOVING ENEWD APPROXIMATELY 55-60 KT.  LEADING EDGE OF THESE
   TSTMS WILL ENTER WV FROM APPROXIMATELY 8Z ONWARD.  THIS GENERAL
   MOTION SHOULD PERSIST FOR SEVERAL MORE HOURS AMIDST VERY STRONG
   AMBIENT KINEMATIC PROFILES...WHICH WILL FAVOR STRONGLY FORCED ASCENT
   ALONG LEADING EDGE OF CONVECTIVE BAND.  SUCH LIFT SHOULD MAINTAIN
   ACTIVITY EWD OUT OF WW 42 AND ACROSS WW 44 DESPITE MEAGER LAPSE
   RATES...DECREASING DEW POINTS WITH EWD EXTENT...ABSENCE OF
   SBCAPE...AND GENERALLY ELEVATED NATURE OF ALREADY MRGL BUOYANCY
   WHICH MAY CONTRIBUTE TO DECAY OF CONVECTIVE ORGANIZATION IN 3-6 HOUR
   TIME FRAME.  MEANWHILE...POTENTIAL WILL PERSIST PRIMARILY FOR
   DAMAGING WINDS...ESPECIALLY OVER W-FACING SLOPES AND HIGHER
   ELEVATIONS AS TSTMS ENTER APPALACHIAN TERRAIN.  POTENTIAL FOR
   SHORT-LIVED/QLCS TYPE TORNADIC SPIN UPS...ASSOCIATED WITH SMALL
   SCALE CIRCULATIONS ALONG LEADING EDGE OF ACTIVITY -- SHOULD DIMINISH
   WITH TIME BUT WILL NOT BE GONE ALTOGETHER UNTIL ACTIVITY IS
   UNAMBIGUOUSLY ROOTED ABOVE SFC.  WW 42 MAY BE CLEARED BEHIND TSTM
   LINE...WITH AIR MASS STABILIZED TOO MUCH FOR ADDITIONAL SVR
   DEVELOPMENT.
   
   ..EDWARDS.. 02/06/2008
   
   
   ATTN...WFO...PBZ...RLX...MRX...JKL...ILN...LMK...
   
   36728595 37148486 37808400 38998395 39788376 40078282
   39978180 40208035 39758002 38318069 37158224 36708327
   36628537