

463 

WWUS20 KWNS 180402

SEL1

SPC WW 180402

PAZ000-180800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 571

NWS STORM PREDICTION CENTER NORMAN OK

1105 PM EST SUN NOV 17 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CENTRAL PENNSYLVANIA



* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1105 PM

  UNTIL 300 AM EST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH OF

WILLIAMSPORT PENNSYLVANIA TO HAGERSTOWN MARYLAND.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU1).



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 568...WW 569...WW 570...



DISCUSSION...LOW-TOPPED CONVECTIVE LINE WILL CONTINUE EWD AT ABOUT

45 KT ACROSS CENTRAL PA THROUGH THE EARLY MORNING HOURS.  DESPITE

LIMITED INSTABILITY AND NO LIGHTNING WITH THE SHALLOW

CONVECTION...60 KT WINDS JUST ABOVE THE GROUND SUGGEST A CONTINUED

RISK FOR ISOLATED DAMAGING GUSTS.



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

