

046 

WWUS20 KWNS 180559

SEL3

SPC WW 180559

NJZ000-PAZ000-181000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 573

NWS STORM PREDICTION CENTER NORMAN OK

100 AM EST MON NOV 18 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHWEST NEW JERSEY

  EASTERN PENNSYLVANIA



* EFFECTIVE THIS MONDAY MORNING FROM 100 AM UNTIL 500 AM EST.



* PRIMARY THREATS INCLUDE...

  A FEW DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40

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

ALLENTOWN PENNSYLVANIA TO 70 MILES SOUTH SOUTHWEST OF ALLENTOWN

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 569...WW 571...WW 572...



DISCUSSION...LOW-TOPPED LINE OF CONVECTION WILL CONTINUE TO MOVE EWD

ACROSS PA IN AN ENVIRONMENT WITH MINIMAL INSTABILITY AND STRONG

VERTICAL SHEAR.  ISOLATED DAMAGING GUSTS WILL BE THE MAIN CONCERN.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 300. MEAN STORM

MOTION VECTOR 27045.





...THOMPSON

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