AREAS FROM NERN OH ACROSS WRN NY AND NY SRN TIER TO THE MOHAWK VALLEY...AS WELL AS NWRN PA...WILL BE INCLUDED IN A SLGT RISK AREA WITH THE ISSUANCE OF THE NEXT SPC DAY 1 OTLK BY 1630 UTC/1230 EDT. FURTHERMORE...A WATCH MAY BE NEEDED ACROSS SOME OF THIS AREA BEFORE NOON EDT. VSBL SATL IMAGERY DEPICTS AN AXIS OF RELATIVELY CLEAR SKIES FROM OH ENEWD ACROSS THE SRN TIER OF NY. EXPECT THAT SURFACE HEATING ACROSS THIS CORRIDOR...ALONG WITH INCREASINGLY FAVORABLE LARGE SCALE ASCENT ASSOCIATED WITH AN APPROACHING UPPER TROUGH...WILL SUPPORT THE CONTINUED DEVELOPMENT OF SEVERE TSTMS INTO THE AFTERNOON. COINCIDENT WITH THE INCREASE IN INSTABILITY WITHIN THE VERY MOIST AND WARMING AIRMASS...DEEP LAYER SHEAR WILL BECOME INCREASINGLY STRONG AS 40-50KT MID-LEVEL SPEED MAX SPREADS EAST FROM THE UPPER GREAT LAKES. THIS WILL PROMOTE LONGER-LIVED/ORGANIZED UPDRAFTS LIKELY TAKING THE FORM OF LINE/BOWING SEGMENTS CAPABLE OF PRODUCING DAMAGING WINDS AS WELL AS SOME HAIL. IF LATEST TRENDS WITH THE BROKEN PRE-FRONTAL LINE OF STORMS NOW MOVING INTO WRN NY CONTINUE...A SVR TSTM WATCH WILL ALSO BE COORDINATED SHORTLY FOR PARTS OF THE REGION.
Monday, July 25, 2011
Mesoscale Discussion #1730 (Outlook Upgrade, Severe T-Storm Watch)
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