MESO: Mesoscale Discussion 1335

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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