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Severe Thunderstorm Watch 517
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WW0517 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
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.
   SEL7
   0-270200-
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 517
   NWS STORM PREDICTION CENTER NORMAN OK
   245 PM EDT FRI JUN 26 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHERN CONNECTICUT
          DISTRICT OF COLUMBIA
          DELAWARE
          MUCH OF MARYLAND
          NEW JERSEY
          SOUTHEAST NEW YORK INCLUDING LONG ISLAND
          SOUTHERN PENNSYLVANIA
          NORTHERN VIRGINIA
          EASTERN WEST VIRGINIA PANHANDLE
          COASTAL WATERS
   
   EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
   1000 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 95
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES EAST
   SOUTHEAST OF ISLIP NEW YORK TO 40 MILES SOUTHWEST OF ALTOONA
   PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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 515...WW 516...
   
   DISCUSSION...SCATTERED THUNDERSTORMS ARE INCREASING ACROSS PARTS OF
   PA/MD/NY IN A VERY MOIST AND UNSTABLE AIRMASS.  THESE STORMS WILL
   PROPAGATE SOUTHEASTWARD TOWARD THE COAST THROUGH THE AFTERNOON AND
   EVENING.  DEGREE OF INSTABILITY AND SUFFICIENT DEEP LAYER EFFECTIVE
   SHEAR WILL PROMOTE A RISK OF DAMAGING WINDS AND HAIL IN THE
   STRONGEST CELLS.
   
   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 29025.
   
   
   ...HART
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Page last modified: June 26, 2009
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