ACUS11 KWNS 071920
SWOMCD
SPC MCD 071919
NYZ000-NJZ000-PAZ000-MDZ000-VAZ000-WVZ000-072115-
MESOSCALE DISCUSSION 1335
NWS STORM PREDICTION CENTER NORMAN OK
0219 PM CDT SUN JUL 07 2013
AREAS AFFECTED...SRN/CNTRL/ERN PA...WRN/CNTRL MD...NRN VA
CONCERNING...SEVERE THUNDERSTORM WATCH 394...
VALID 071919Z - 072115Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 394
CONTINUES.
SUMMARY...QLCS SHOULD CONTINUE TO POSE A RISK FOR DAMAGING WIND
SWATHS /MOST PROBABLE IN PA/. DOWNSTREAM WW ISSUANCE IS ANTICIPATED
BY 21-22Z.
DISCUSSION...BULGING PORTION OF QLCS SHOULD CONTINUE TO EVOLVE NEWD
FROM S-CNTRL PA WITH FORWARD MOTION OF 30-35 KT. MEASURED SURFACE
WIND GUSTS HAVE THUS FAR BEEN COMMENSURATE WITH THIS SPEED.
HOWEVER...ACTIVITY IS EVOLVING INTO A MORE UNSTABLE AIR
MASS...CHARACTERIZED BY SURFACE TEMPERATURES NEAR 90 AND MLCAPE OF
1500-2500 J/KG. WITH AROUND 30 KT 0-6 KM SHEAR SAMPLED IN STATE
COLLEGE VWP DATA...THE QLCS SHOULD REMAIN ORGANIZED WITH SWATHS OF
DAMAGING WINDS.
..GRAMS.. 07/07/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...OKX...PHI...BGM...CTP...LWX...
LAT...LON 39127881 40057812 40727810 41487711 41737608 41827554
41317436 39777574 38867733 38847856 39127881
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