

140 

WWUS20 KWNS 011026

SEL9

SPC WW 011026

NJZ000-PAZ000-011500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 559

NWS STORM PREDICTION CENTER NORMAN OK

625 AM EDT FRI NOV 1 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHWEST NEW JERSEY

  SOUTHEAST AND EAST-CENTRAL PENNSYLVANIA



* EFFECTIVE THIS FRIDAY MORNING FROM 625 AM UNTIL 1100 AM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTHEAST OF

PHILADELPHIA PENNSYLVANIA TO 40 MILES NORTH OF ALLENTOWN

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 558...



DISCUSSION...A FORCED LINE OF CONVECTION OVER CENTRAL PENNSYLVANIA

IS EXPECTED TO RAPIDLY MOVE EAST ACROSS THE WATCH AREA THIS MORNING

AT 40-50 KT.  WHILE INSTABILITY WILL REMAIN QUITE LIMITED...THE

PRESENCE OF A VERY STRONG WIND FIELD WILL SUPPORT THE POTENTIAL FOR

CORRIDORS OF WIND DAMAGE WITH THE PASSAGE OF THE LINE.



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 250. MEAN STORM

MOTION VECTOR 24045.





...MEAD

