MESOSCALE DISCUSSION 0472
   NWS STORM PREDICTION CENTER NORMAN OK
   0221 PM CDT TUE APR 19 2011
   
   AREAS AFFECTED...SE OH...NRN-CNTRL WV...NRN VA...WRN MD
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 191921Z - 192015Z
   
   THE POTENTIAL FOR WIND DAMAGE MAY INCREASE ACROSS SE OH AND WV OVER
   THE NEXT FEW HOURS. THE THREAT MAY EXIST AS FAR EAST AS NRN VA AND
   WRN MD LATER THIS AFTERNOON. THE SEVERE THREAT WILL CONTINUE TO BE
   MONITORED FOR POSSIBLE WW ISSUANCE.
   
   A LINE-SEGMENT IN SE OH IS INCREASING IN INTENSITY...BEING LOCATED
   ALONG A QUASI-STATIONARY FRONTAL BOUNDARY. SOME INSTABILITY HAS
   DEVELOPED ALONG THE BOUNDARY DUE TO WARMING SFC TEMPS. THE LINE IS
   LOCATED JUST AHEAD OF A SHORTWAVE TROUGH EVIDENT ON WATER VAPOR
   IMAGERY AND IS ON THE NOSE OF A 60 T0 70 KT MID-LEVEL JET. THE
   MID-LEVEL JET AND SHORTWAVE TROUGH ARE HELPING TO CREATE A FAVORABLE
   ENVIRONMENT FOR SUSTAINED BOWING-LINE SEGMENTS. THE LINE SEGMENT
   WHICH APPEARS TO BE DEVELOPING A COLD POOL...IS ALSO JUST AHEAD OF A
   50 KT LOW-LEVEL JET WHICH MAY ENHANCE THE POTENTIAL FOR WIND DAMAGE
   AS THE LINE MOVES ESEWD INTO THE CNTRL APPALACHIAN MTNS.
   
   ..BROYLES.. 04/19/2011
   
   
   ATTN...WFO...LWX...PBZ...RLX...
   
   LAT...LON   39658152 39058182 38788161 38448006 38297849 39017805
               39397835 39727994 39858090 39658152