SWOMCD
SPC MCD 261819
MAZ000-CTZ000-NYZ000-NJZ000-PAZ000-DEZ000-MDZ000-WVZ000-261915-
MESOSCALE DISCUSSION 1335
NWS STORM PREDICTION CENTER NORMAN OK
0119 PM CDT FRI JUN 26 2009
AREAS AFFECTED...S CNTRL/SERN PA...SERN NY...WRN CT...NJ...DE...NRN
MD
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 261819Z - 261915Z
VISIBLE IMAGERY SHOWS ISOLATED CONVECTION BEGINNING TO DEVELOP OVER
PARTS OF SOUTH CENTRAL/SERN PA TO THE SOUTH OF WW 516 WITHIN REGION
OF ENHANCED DIABATIC HEATING. CONVECTION MAY CONTINUE TO DEVELOP
AND INTENSIFY THIS AFTERNOON...AND NEW WW WILL LIKELY BE ISSUED
SOON.
WATER VAPOR IMAGERY SHOWS WELL-DEFINED VORTICITY MAX MOVING SEWD
TOWARD LAKE ONTARIO...WITH STRONG/SEVERE CONVECTION MOVING ACROSS
CENTRAL NY AND NORTH CENTRAL/NERN PA WITH LEADING CELL MOVING INTO
EXTREME SERN NY. THIS ACTIVITY IS EXPECTED TO MOVE EWD/ESEWD ACROSS
SERN NY AND EVENTUALLY MOVE TOWARD WRN CT WHERE LIMITED
CLOUDS/STRONGER HEATING IS OCCURRING. FARTHER SOUTH...THUNDERSTORMS
ARE LIKELY TO INCREASE IN COVERAGE AND INTENSITY WITHIN THE SRN EDGE
OF STRONGER WNWLY FLOW ALOFT WITHIN INSTABILITY AXIS ACROSS SRN PA
INTO NJ.
..WEISS.. 06/26/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BOX...OKX...ALY...PHI...BGM...CTP...LWX...
LAT...LON 40967797 40987646 41127541 41737412 42167340 41947252
41377316 40907379 40157409 38767495 39027661 39547801
39767875 40967797
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