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210 

WWUS20 KWNS 262206

SEL6

SPC WW 262206

NYZ000-OHZ000-PAZ000-WVZ000-LEZ000-270400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 386

NWS STORM PREDICTION CENTER NORMAN OK

610 PM EDT THU MAY 26 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF WESTERN NEW YORK

       PARTS OF EASTERN OHIO

       MUCH OF WESTERN PENNSYLVANIA

       SMALL PART OF NORTHERN WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS THURSDAY NIGHT FROM 610 PM UNTIL MIDNIGHT EDT.



HAIL TO 2 INCHES 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES SOUTHEAST OF

ZANESVILLE OHIO TO 80 MILES NORTHEAST OF JAMESTOWN 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 380...WW 381...WW

382...WW 383...WW 384...WW 385...



DISCUSSION...SCATTERED THUNDERSTORMS DEVELOPING AHEAD OF SURFACE LOW

AND UPPER TROUGH WHERE AIR MASS IS MODESTLY UNSTABLE.  WITH 50-60 KT

OF DEEP LAYER SHEAR AND AREAS OF STEEP LOW LEVEL LAPSE RATES WHERE

GOOD HEATING HAS OCCURRED...THREAT FOR DAMAGING WINDS WILL INCREASE

AND SPREAD NEWD ACROSS THE WATCH THRU THE EVENING.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 23035.





...HALES

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