SWOMCD
SPC MCD 241934
NJZ000-PAZ000-DEZ000-MDZ000-VAZ000-DCZ000-WVZ000-242100-
MESOSCALE DISCUSSION 1659
NWS STORM PREDICTION CENTER NORMAN OK
0234 PM CDT FRI JUL 24 2009
AREAS AFFECTED...SERN PA...NRN VA...MD...NJ...THE DELMARVA REGION
CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY
VALID 241934Z - 242100Z
STORMS CONTINUE TO INTENSIFY LOCALLY...BUT LIMITED SEVERE POTENTIAL
EVIDENT ATTM SUGGESTS THAT WW WILL REMAIN UNNECESSARY.
LATEST RADAR/VISIBLE IMAGERY SHOWS CONVECTION SLOWLY INCREASING FROM
S CENTRAL PA SWD INTO NRN AND CENTRAL VA...WHERE MODERATE
DESTABILIZATION IS OCCURRING DUE TO DIURNAL BOUNDARY-LAYER HEATING
BENEATH COOL MID-LEVEL TEMPERATURES. THE STORMS SHOULD SPREAD EWD
WITH TIME...IN CONJUNCTION WITH THE EWD-MOVING UPPER SYSTEM CROSSING
NY/PA ATTM AND PROVIDING FAVORABLE LARGE-SCALE ASCENT.
DEGREE OF DESTABILIZATION COMBINED WITH MODERATE DEEP-LAYER SHEAR
SUGGESTS THAT LOCAL MULTICELL ORGANIZATION -- AND ISOLATED SEVERE
POTENTIAL -- CAN BE EXPECTED OVER THE NEXT SEVERAL HOURS. OVERALL
THREAT SHOULD REMAIN MARGINAL HOWEVER...LIKELY NOT REQUIRING WW
ISSUANCE.
..GOSS.. 07/24/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PHI...BGM...AKQ...CTP...LWX...
LAT...LON 37997778 38347830 39917789 40957634 41007489 39807459
38177540 37907684 37997778
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