SWOMCD
SPC MCD 191901
WVZ000-VAZ000-NCZ000-TNZ000-OHZ000-KYZ000-192100-
MESOSCALE DISCUSSION 0667
NWS STORM PREDICTION CENTER NORMAN OK
0201 PM CDT SAT APR 19 2008
AREAS AFFECTED...FAR ERN KY...SCNTRL OH...SWRN WV...SWRN
VA...EXTREME NWRN NC
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 191901Z - 192100Z
UPR LOW CONTINUES A SLOW EWD TREK INTO SWRN IND AT MID-AFTN. THERE
APPEARS TO BE A MODEST SPEED MAX MOVING QUICKLY TOWARD THE KY
COALFIELDS IN WATER VAPOR IMAGERY. THE ENHANCED ASCENT ASSOCD WITH
THIS FEATURE IN COMBINATION WITH MORE SIGNIFICANT COOLING ALOFT
BEGINNING TO SPREAD EWD WILL LIKELY MAKE FOR A MORE FAVORABLE
ENVIRONMENT FOR TSTMS THROUGH LATE AFTN.
EARLIER BANDS OF CONVECTION EFFECTIVELY MOISTENED THE BOUNDARY LAYER
WITH A NARROW ZONE OF LWR-MID 50S SFC DEW POINTS NOTED ALONG/AHEAD
OF A FRACTURED OCCLUDED FRONT. IN WAKE OF THE EARLY CONVECTION...A
BRIEF PERIOD OF INSOLATION HAS CONTRIBUTED TO WARMING SFC
TEMPERATURES WITH SBCAPES APPROACHING 500 J/KG ALONG THE APPALACHIAN
CREST NWWD INTO THE ERN KY COALFIELDS AND THE SWRN LOWLANDS OF WV.
TSTMS ARE EXPECTED TO DEVELOP VCNTY THE OCCLUDED FRONT FROM NERN
TN/NWRN NC NWWD INTO ERN KY AND SWRN WV THEN MOVE NWD TOWARD THE
MID-OH VLY WITH TIME. GIVEN COOLING TEMPERATURES ALOFT...ISOLD MORE
VIGOROUS STORMS MAY PRODUCE HAIL ALONG WITH GUSTY WINDS.
A WW IS NOT ANTICIPATED GIVEN THE MARGINAL INSTABILITY AND ISOLD
NATURE TO ANY SVR POTENTIAL.
..RACY.. 04/19/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RNK...RLX...GSP...MRX...JKL...ILN...
36008309 37168308 37628301 37918307 38228311 38398307
38588287 38778254 38938228 38978187 38978170 38918127
38778085 38458064 38088062 37468055 36968061 36648069
36408082 36228106 36038159 35958198 35898227 35918266
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