

367 

WWUS20 KWNS 141944

SEL4

SPC WW 141944

DEZ000-MDZ000-NJZ000-NYZ000-PAZ000-CWZ000-150200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 174

NWS STORM PREDICTION CENTER NORMAN OK

345 PM EDT FRI MAY 14 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DELAWARE

       EASTERN MARYLAND

       MOST OF NEW JERSEY

       PARTS OF SOUTHEAST NEW YORK

       PARTS OF EASTERN PENNSYLVANIA

       COASTAL WATERS



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 345 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF

ALLENTOWN PENNSYLVANIA TO 50 MILES SOUTH SOUTHEAST 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 170...WW 171...WW

172...WW 173...



DISCUSSION...STRONG/SEVERE THUNDERSTORMS DEVELOPING ACROSS SRN PA

EXPECTED TO CONTINUE THRU NJ AND EVENTUALLY DE AS AIR MASS

DESTABILIZES EWD.  PRIMARY THREAT WILL BE LARGE HAIL AND WIND

DAMAGE...PARTICULARLY ASSOCIATED WITH LINE SEGMENTS/BOWS THAT FORM

IN THE STRONG MID LEVEL FLOW.



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 27035.





...HALES

