SWOMCD
SPC MCD 072041
MAZ000-NHZ000-RIZ000-CTZ000-NYZ000-VTZ000-NJZ000-PAZ000-072245-
MESOSCALE DISCUSSION 1475
NWS STORM PREDICTION CENTER NORMAN OK
0341 PM CDT TUE JUL 07 2009
AREAS AFFECTED...NERN PA...NRN NJ...ERN NY...SRN NH...SRN
VT...MA...RI...CT
CONCERNING...SEVERE THUNDERSTORM WATCH 559...
VALID 072041Z - 072245Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 559
CONTINUES.
THE LINE OF STORMS FROM SERN NH INTO ERN MA HAS GRADUALLY WEAKENED
DURING THE LAST HOUR AS IT MOVED EWD INTO A COOLER AND LESS UNSTABLE
ENVIRONMENT. THIS CONVECTION IS EXPECTED TO PROGRESS EWD WITH A
DIMINISHING SEVERE THREAT.
IN THE WRN PARTS OF WW 559...SCATTERED STRONG/SEVERE STORMS ARE
MOVING EWD ACROSS PARTS OF ERN NY FROM EXTREME NERN NY. THESE
STORMS ARE MOVING THROUGH AN AIR MASS THAT HAS RECOVERED SOMEWHAT
FROM THE STABILIZING EFFECTS OF PREVIOUS THUNDERSTORM ACTIVITY.
LIMITED CLOUDS AND DIABATIC HEATING COUPLED WITH COOLING ALOFT ARE
CONTRIBUTING TO LATE AFTERNOON DESTABILIZATION OVER PARTS OF VT AND
THE WRN PARTS OF MA AND CT. THE ERN NY STORMS ARE LIKELY TO SPREAD
EWD OVER THE NEXT SEVERAL HOURS WITH A CONTINUED THREAT FOR STRONG
WIND GUSTS AND HAIL.
..WEISS.. 07/07/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...
LAT...LON 40257477 40827528 41217486 42327444 42937478 43497508
44087504 44047430 43497292 42947113 42667062 41927121
41037136 40707171 40207306 39997400 40257477
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