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WWUS20 KWNS 061853

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 626

NWS STORM PREDICTION CENTER NORMAN OK

250 PM EDT THU SEP 6 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       UPSTATE NEW YORK

       WESTERN VERMONT

       LAKE ONTARIO



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 250 PM UNTIL

900 PM EDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES EAST

SOUTHEAST OF BURLINGTON VERMONT TO 20 MILES WEST SOUTHWEST OF

BUFFALO NEW YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 625...



DISCUSSION...SCTD TSTMS EXPECTED TO CONTINUE FORMING OVER THE HIGHER

TERRAIN AND ALONG LK BREEZE BOUNDARIES OVER UPSTATE NY AS SFC

HEATING CONTINUES OVER REGION. MODERATE...DEEP UNIDIRECTIONAL WLY

FLOW PARALLEL TO THE LAKES SUGGESTS THAT UPDRAFTS MAY REMAIN ON OR

NEAR THE BOUNDARIES FOR AN APPRECIABLE LENGTH OF TIME...ENHANCING

POTENTIAL FOR SMALL BOWS WITH LOCALLY DMGG WIND AND/OR MARGINALLY

SVR HAIL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 27025.





...CORFIDI

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