ZCZC SPCSWOMCD ALL
ACUS11 KWNS 092055 
SPC MCD 092055 
PAZ000-DEZ000-MDZ000-VAZ000-WVZ000-092230-

MESOSCALE DISCUSSION 1344
NWS STORM PREDICTION CENTER NORMAN OK
0355 PM CDT THU JUL 09 2015

AREAS AFFECTED...PA

CONCERNING...TORNADO WATCH 397...

VALID 092055Z - 092230Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 397 CONTINUES.

SUMMARY...DAMAGING WIND/ISOLATED TORNADO POTENTIAL CONTINUES...AND
MAY SOMEWHAT INCREASE...PARTICULARLY ACROSS MUCH OF EAST-CENTRAL PA
AND POSSIBLY NEARBY MARYLAND THROUGH LATE AFTERNOON/EARLY EVENING.
TORNADO WATCH 397 CONTINUES UNTIL 01Z.

DISCUSSION...MODEST DESTABILIZATION CONTINUES TO OCCUR WITHIN A
WARM/MOIST SECTOR TO THE SOUTH/SOUTHEAST OF A SURFACE LOW ALONG THE
SOUTH-CENTRAL NY/NORTH-CENTRAL PA BORDER VICINITY AND ALONG/SOUTH OF
A SLOW-NORTHWARD-SHIFTING WARM FRONT EXTENDING ACROSS
NORTH-CENTRAL/NORTHEAST PA SOUTHEASTWARD INTO NJ AS OF 20Z. WHILE
UPDRAFT INTENSITY HAS BEEN SOMEWHAT TEMPERED BY WEAK MID-LEVEL LAPSE
RATES/MODEST BUOYANCY...STEADY WARMING CONTINUES TO OCCUR LATE THIS
AFTERNOON WITH INCREASING DESTABILIZATION TO THE EAST OF THE CURRENT
CONVECTION...WHICH MAY CONTRIBUTE TO AN UPTICK IN INTENSITY OVER THE
NEXT FEW OURS ACROSS EAST-CENTRAL PA/NEARBY MD AND POINTS
DOWNSTREAM...WHERE A NEW WATCH /398/ HAS BEEN RECENTLY COORDINATED.
VARIOUS REGIONAL WSR-88D VWP PROFILES...INCLUDING CHARLESTON
WV/STATE COLLEGE PA/BALTIMORE-WASHINGTON...CONTINUE TO SAMPLE AN
EASTWARD-SHIFTING BELT OF STRONG WESTERLY WINDS ALOFT WHICH WILL
REMAIN QUITE FAVORABLE FOR CONTINUED SUPERCELL POTENTIAL AND
FAST-EASTWARD-MOVING LINE SEGMENTS/BOWS. DAMAGING WIND/ISOLATED
TORNADO POTENTIAL WILL EXIST PARTICULARLY WITHIN THE EASTERN PORTION
OF TORNADO WATCH 397.

..GUYER.. 07/09/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...PHI...BGM...CTP...LWX...PBZ...

LAT...LON   40497921 41237836 41687719 41357659 40887553 39597565
            39447595 39077622 39257726 39147828 39137904 39477963
            40497921 

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