SWOMCD
SPC MCD 211941
MEZ000-MAZ000-NHZ000-RIZ000-VTZ000-CTZ000-NYZ000-NJZ000-PAZ000-DEZ000-MDZ000-212045-
MESOSCALE DISCUSSION 1401
NWS STORM PREDICTION CENTER NORMAN OK
0241 PM CDT WED JUL 21 2010
AREAS AFFECTED...NORTHEAST
CONCERNING...SEVERE THUNDERSTORM WATCH 507...508...
VALID 211941Z - 212045Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
507...508...CONTINUES.
SEVERE THUNDERSTORMS CAPABLE OF DMGG WINDS...LARGE HAIL...AND
ISOLATED TORNADOES WILL CONTINUE TO AFFECT MUCH OF THE NORTHEAST.
AMPLE DIURNAL HEATING HAS LED TO A MODERATELY UNSTABLE AIR MASS...AS
EVIDENCED BY AREA 18Z SOUNDINGS WHERE MLCAPE IS GENERALLY AROUND
1000 TO 1200 J/KG. ALTHOUGH THUNDERSTORMS HAVE STABILIZED THE
SURFACE IN LOCALIZED AREAS...FAST MOVEMENT OF STORMS AND FEW CLOUDS
IN AREAS SURROUNDING THUNDERSTORMS SHOULD ALLOW
HEATING/DESTABILIZATION TO OCCUR IN THE WAKE OF THESE STORMS IN
CURRENTLY RAIN COOLED AREAS. SEVERAL ROUNDS OF THUNDERSTORMS ARE
ANTICIPATED...WITH THE FIRST PROGRESSING EWD UNDER INFLUENCE OF A
SHORT WAVE TROUGH OVER ERN NY...AND HEIGHT FALLS AND AMPLE UPPER JET
SUPPORT NOW BEGINNING TO GLANCE THE AREA FROM THE WEST. STRONG WIND
FIELD WILL CONTINUE TO SUPPORT BOWING SEGMENTS AND SUPERCELLULAR
STRUCTURES...WITH DAMAGING WINDS...LARGE HAIL...AND ISOLATED
TORNADOES POSSIBLE.
..HURLBUT.. 07/21/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CAR...GYX...BOX...BTV...OKX...ALY...PHI...BGM...
BUF...CTP...LWX...PBZ...
LAT...LON 40017397 39017541 39427604 40777843 41147947 42127961
42987895 43387848 43627651 44657533 45087329 45147164
45647059 46486976 44076882 42487071 41127077 40017397
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