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Severe Thunderstorm Watch 212
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WW0212 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 212
   NWS STORM PREDICTION CENTER NORMAN OK
   340 PM EDT WED MAY 22 2013
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   
   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
     WESTERN NEW YORK
     NORTHEASTERN PENNSYLVANIA
     LAKE ERIE
     LAKE ONTARIO
   
   * EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 340 PM
     UNTIL 1100 PM EDT.
   
   * PRIMARY THREATS INCLUDE...
     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE
     A FEW TORNADOES POSSIBLE
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST OF
   BUFFALO NEW YORK TO 15 MILES SOUTHEAST OF UTICA NEW YORK.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU2).
   
   PRECAUTIONARY/PREPAREDNESS ACTIONS...
   
   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 210...WW 211...
   
   DISCUSSION...LARGE-SCALE FORCING FOR UPWARD VERTICAL MOTION AHEAD OF
   A SHORT WAVE IMPULSE MOVING NORTHEAST OF THE LOWER OHIO VALLEY IS
   EXPECTED TO CONTRIBUTE TO INCREASING THUNDERSTORM DEVELOPMENT LATE
   THIS AFTERNOON AND EVENING.  IN THE PRESENCE OF WEAK TO MODERATE
   INSTABILITY...DEEP LAYER SHEAR WILL BE SUPPORTIVE OF ORGANIZED
   CONVECTIVE DEVELOPMENT.  A WINDOW OF OPPORTUNITY APPEARS TO EXIST
   FOR DISCRETE SUPERCELL DEVELOPMENT...AS SOUTHERLY 850 MB FLOW
   STRENGTHENS...WITH ONE OR TWO TORNADOES NOT OUT OF THE QUESTION. 
   HOWEVER...THIS THREAT IS EXPECTED TO BE SHORT-LIVED AND FAIRLY
   LOCALIZED...AS BOUNDARY LAYER MIXING HAS RESULTED IN SIZABLE
   TEMPERATURE/DEW POINT SPREADS...WHICH PROBABLY WILL ALLOW OUTFLOW TO
   QUICKLY UNDERCUT MESOCYLONES.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
   MOTION VECTOR 26035.
   
   
   ...KERR
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