SWOMCD
SPC MCD 042130
MDZ000-VAZ000-PAZ000-DCZ000-WVZ000-042200-
MESOSCALE DISCUSSION 1567
NWS STORM PREDICTION CENTER NORMAN OK
0430 PM CDT WED AUG 04 2010
AREAS AFFECTED...PA MD WV VA
CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON
VALID 042130Z - 042200Z
A WELL ORGANIZED QUASI-LINEAR MCS MOVING GENERALLY ESEWD AT 40KT AND
ACCOMPANIED BY DAMAGING WINDS MAY MAINTAIN INTENSITY ACROSS THE
CREST OF THE APPALACHIAN MOUNTAINS THIS EVENING. WHILE DOWNSTREAM
DESTABILIZATION HAS BEEN SOMEWHAT INHIBITED BY RESIDUAL CLOUDS FROM
A LEADING MCV...CLEARING ACROSS THE BLUE RIDGE AND POINTS EAST HAS
CONTRIBUTED TO A GRADUAL INCREASE IN CAPE AMIDST VERY MOIST AIR MASS
WHERE SURFACE DEWPOINTS WERE EXCEEDING 75F.
STRONGER WIND FIELDS OF 25-30KT COINCIDENT WITH THE MID-LEVEL
IMPULSE DRIVING THE MCS SHOULD REMAIN SOMEWHAT DISPLACED TO THE
NORTH OF THE GREATER INSTABILITY THIS EVENING. HOWEVER...CURRENT
INTENSITY OF THE SYSTEM AND THE POTENTIAL FOR A FEW MORE HOURS OF
HEATING FROM THE APPALACHIAN FOOTHILLS EWD ALONG THE PA/MD BORDER
AND NRN VA POINT TOWARD THE NEED FOR AN ADDITIONAL WATCH FOR THESE
AREAS
..CARBIN.. 08/04/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PHI...AKQ...CTP...LWX...RNK...PBZ...RLX...
LAT...LON 40067878 37778027 37377979 36977879 37357628 39667608
39967694 40067878
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