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Severe Thunderstorm Watch 244
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WW0244 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.
   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 244
   NWS STORM PREDICTION CENTER NORMAN OK
   815 PM EDT WED APR 27 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          DELAWARE
          EASTERN MARYLAND
          NORTHERN NEW JERSEY
          EASTERN NEW YORK
          EASTERN PENNSYLVANIA
          COASTAL WATERS
   
   EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 815 PM
   UNTIL 400 AM EDT.
   
   HAIL TO 1.5 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 55
   STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES EAST
   NORTHEAST OF MASSENA NEW YORK TO 45 MILES SOUTH OF DOVER
   DELAWARE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
   
   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 235...WW 236...WW
   237...WW 238...WW 239...WW 240...WW 241...WW 242...WW 243...
   
   DISCUSSION...BROKEN BAND OF TSTMS OVER CNTRL PARTS OF NY/PA IS
   EXPECTED TO CONTINUE EWD INTO THE HUDSON/DE RIVER VALLEYS WHERE
   BOUNDARY LAYER IS COMPARATIVELY MORE MOIST WITH DEWPOINTS IN THE
   60S.  00Z IAD/ALB SOUNDINGS INDICATE THAT MLCAPE VALUES RANGE FROM
   AROUND 500 J/KG ACROSS NRN PORTIONS OF WW AREA...TO 1000-1200 J/KG
   OVER THE SOUTH.  VERTICAL SHEAR WILL STRENGTHEN TONIGHT IN ADVANCE
   OF UPSTREAM SYSTEM OVER THE OH VALLEY WITH ENVIRONMENT REMAINING
   SUPPORTIVE OF BOWING AND SUPERCELL TYPE STRUCTURES.  WHILE A BRIEF
   TORNADO IS POSSIBLE...DAMAGING WINDS AND HAIL APPEAR TO BE THE
   PRIMARY SEVERE WEATHER HAZARDS.
   
   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 400. MEAN STORM
   MOTION VECTOR 24040.
   
   
   ...MEAD
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Page last modified: April 28, 2011
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