SWOMCD
SPC MCD 191815
NJZ000-PAZ000-DEZ000-MDZ000-VAZ000-DCZ000-WVZ000-OHZ000-191845-
MESOSCALE DISCUSSION 1197
NWS STORM PREDICTION CENTER NORMAN OK
0115 PM CDT TUE JUN 19 2007
AREAS AFFECTED...PARTS OF SERN OH/WV INTO NRN VA/MD AND SRN PA
CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON
VALID 191815Z - 191845Z
WW WILL BE NEEDED SOON FOR PARTS OF SERN OH/WV INTO NRN VA/MD AND
SRN PA.
AIR MASS HAS CONTINUED TO DESTABILIZE THIS AFTERNOON WITH MLCAPE
VALUES GREATEST ALONG/E OF THE APPALACHIANS WITH VALUES UP TO 2000
J/KG. ISOLATED STRONG TO SEVERE PULSE-TYPE STORMS WILL CONTINUE TO
DEVELOP ALONG/E OF THE HIGHER TERRAIN FROM WRN VA INTO CENTRAL PA
WHERE DEEP LAYER SHEAR REMAINS SOMEWHAT MODEST /SFC-6 KM SHEAR AT 25
KT PER IAD 17Z SPECIAL SOUNDING/. ADDITIONAL ACTIVITY WILL ALSO
DEVELOP IN ADVANCE OF THE COLD FRONT AND WITH HEIGHT FALLS AHEAD OF
THE GREAT LAKES UPPER TROUGH AND RESULT IN THREAT FOR SEVERE STORMS
WITHIN THE MODERATELY UNSTABLE AIR MASS. 30-40 KT SWLY MID LEVEL
FLOW WITH THE UPPER TROUGH WILL SUPPORT A GREATER POTENTIAL FOR
ORGANIZED STORMS AS ACTIVITY MOVES EWD INTO THE UPPER OH VALLEY.
.PETERS.. 06/19/2007
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PHI...BGM...AKQ...CTP...LWX...RNK...PBZ...RLX...
41417476 39877525 38067663 37697930 37958057 38728192
39758188 40637973
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