

864 

WWUS20 KWNS 180123

SEL0

SPC WW 180123

MDZ000-NYZ000-PAZ000-WVZ000-LEZ000-LOZ000-180600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 570

NWS STORM PREDICTION CENTER NORMAN OK

825 PM EST SUN NOV 17 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  THE WESTERN MARYLAND PANHANDLE

  WESTERN NEW YORK

  WESTERN PENNSYLVANIA

  THE NORTHERN WEST VIRGINIA PANHANDLE

  LAKE ERIE

  LAKE ONTARIO



* EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 825 PM

  UNTIL 100 AM EST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF

BUFFALO NEW YORK TO 15 MILES SOUTHWEST OF MORGANTOWN WEST

VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 565...WW 566...WW

567...WW 568...WW 569...



DISCUSSION...A SQUALL LINE WILL RACE EWD AT 50 KT ACROSS WRN PA/NY

DURING THE NEXT SEVERAL HOURS.  DESPITE MINIMAL INSTABILITY AND

LITTLE IF ANY LIGHTNING...60-70 KT FLOW WITHIN 1 KM OF THE GROUND

WILL SUPPORT A RISK FOR DAMAGING WINDS WITH THE CONVECTIVE 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 350. MEAN STORM

MOTION VECTOR 27050.





...THOMPSON

