April 26: Severe Thunderstorm Watch #1

URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 213
   NWS STORM PREDICTION CENTER NORMAN OK
   150 PM EDT TUE APR 26 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          EXTREME WESTERN MARYLAND
          MUCH OF UPSTATE NEW YORK
          PENNSYLVANIA
          NORTHERN WEST VIRGINIA
          LAKE ONTARIO
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 150 PM UNTIL
   900 PM 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 90
   STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH
   NORTHEAST OF UTICA NEW YORK TO 45 MILES SOUTH SOUTHEAST OF
   LATROBE PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
   THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   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.
   
   DISCUSSION...SEVERAL BANDS OF BROKEN CONVECTION ARE DEVELOPING ALONG
   TWO PRIMARY ZONES OF LOW LEVEL CONFLUENCE ACROSS THE OH VALLEY INTO
   UPSTATE NY.  THUNDERSTORMS WILL GRADUALLY INTENSIFY AND INCREASE IN
   AREAL COVERAGE AS THEY SPREAD/DEVELOP DOWNSTREAM.  LARGE HAIL AND
   DAMAGING WINDS ARE EXPECTED WITH THE STRONGEST STORMS.
   
   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 450. MEAN STORM
   MOTION VECTOR 22030.