MESOSCALE DISCUSSION 0384
   NWS STORM PREDICTION CENTER NORMAN OK
   1038 PM CST FRI APR 04 2003
   
   AREAS AFFECTED...SWRN PA/ERN AND SRN OH/WV/KY
   
   CONCERNING...TORNADO WATCH 90...
   
   VALID 050438Z - 050615Z
   
   SEGMENTED SQUALL LINE CURRENTLY ALONG A LINE FROM SWRN OH INTO
   WRN KY WAS MOVING EWD AT UP TO 50KT. AT THIS SPEED THE LINE WILL
   MOVE OUT OF WW 90 BY 0600 UTC. PRONOUNCED BOW ECHO WAS MOVING
   RAPIDLY TOWARD SDF/LOU AREA AND OTHER STRONG PORTIONS ALONG THE
   LINE WILL CONTINUE TO POSE A THREAT OF DAMAGING WINDS AND HAIL.
   
   WATER VAPOR LOOP INDICATES VERY STRONG MID/UPPER WAVE TRANSLATING
   RAPIDLY EWD ACROSS THE MS VALLEY AND THIS LARGE SCALE FEATURE
   SHOULD CONTINUE TO SUSTAIN STRONG ASCENT ALONG/AHEAD OF THE COLD
   FRONT AS IT MOVES EWD UP THE OH VALLEY AND INTO ERN KY OVERNIGHT.
   
   VERY STEEP MIDLEVEL LAPSE RATES ATOP MODEST WARM/MOIST AXIS WILL
   CONTRIBUTE TO MLCAPE VALUES OF 500-1000 J/KG AND FUEL VIGOROUS
   TSTMS. THUS...EXPECT THE THREAT OF DAMAGING WINDS TO CONTINUE
   BEYOND 0600 UTC AND ANOTHER WATCH WILL LIKELY BE NECESSARY FROM
   SRN OH/NRN KY EWD TO PERHAPS WRN PA AND WV.
   
   ..CARBIN.. 04/05/2003
   
   
   ATTN...WFO...PBZ...RLX...CLE...JKL...ILN...LMK...
   
   39578442 40528204 40847994 40028018 37348283 36758421
   36668686