SWOMCD
SPC MCD 292020
NJZ000-DEZ000-MDZ000-VAZ000-DCZ000-WVZ000-292115-
MESOSCALE DISCUSSION 1495
NWS STORM PREDICTION CENTER NORMAN OK
0320 PM CDT THU JUL 29 2010
AREAS AFFECTED...CENTRAL AND ERN VA...MD...DE AND FAR SRN NJ
CONCERNING...SEVERE THUNDERSTORM WATCH 548...
VALID 292020Z - 292115Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 548
CONTINUES.
UNTIL THE COLD FRONT PASSAGE...MODERATE INSTABILITY IN ADVANCE OF
THE FRONT AND STRONGER EFFECTIVE BULK SHEAR ACROSS NRN AND ERN
EXTENTS OF WW 548 WILL CONTINUE TO SUPPORT A THREAT FOR STRONG/
DAMAGING WINDS.
AT 20Z...REGIONAL RADARS SHOWED MULTIPLE BANDS OF STORMS SPREADING
SEWD ACROSS WW 548...ALONG AND IN ADVANCE OF A COLD FRONT MOVING
INTO THE MID ATLANTIC STATES REGION. THE STRONGEST STORMS EXTENDED
ALONG A LINE FROM CENTRAL VA /NELSON COUNTY/ ENEWD TO THE MD ERN
SHORE /DORCHESTER AND WICOMICO COUNTIES/ AND THEN NEWD TO OFF THE
SRN NJ COAST. THIS LINE OF ACTIVITY WAS MOVING INTO AND THROUGH A
SW-NE ORIENTED CORRIDOR OF MODERATE INSTABILITY /MLCAPE 2000-2500 J
PER KG/ WHILE EFFECTIVE BULK SHEAR RANGING FROM 25-35 KT SHOULD
CONTINUE TO FAVOR PRIMARILY MULTICELL BANDS. STEEP LOW LEVEL LAPSE
RATES...ESPECIALLY THROUGHOUT CENTRAL/ERN VA WHERE SURFACE
TEMPERATURES HAVE REACHED 100 F...WILL FAVOR STRONG/DAMAGING WINDS
AS THE PRIMARY THREAT THROUGH THE LATE AFTERNOON.
..PETERS.. 07/29/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PHI...AKQ...LWX...RNK...
LAT...LON 39237399 37657493 36987559 37067638 36747868 37017943
38517930 38657819 39077706 39287694 39567539 39387484
39547415 39237399
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