

918 

WWUS20 KWNS 250442

SEL6

SPC WW 250442

NYZ000-OHZ000-PAZ000-WVZ000-251000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 806

NWS STORM PREDICTION CENTER NORMAN OK

1245 AM EDT THU AUG 25 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL NEW YORK

       EAST CENTRAL OHIO

       WESTERN AND NORTH CENTRAL PENNSYLVANIA

       FAR NORTHERN WEST VIRGINIA



EFFECTIVE THIS THURSDAY MORNING FROM 1245 AM UNTIL 600 AM EDT.



HAIL TO 0.5 INCH 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 55

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

BRADFORD PENNSYLVANIA TO 35 MILES WEST SOUTHWEST OF PITTSBURGH

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 803...WW 804...WW 805...



DISCUSSION...LEWP IN NRN OH SHOULD CONTINUE EWD THROUGH LATER THIS

MORNING.  WHILE STORMS WILL ENCOUNTER DECREASING CAPE WITH EWD

EXTENT...DEGREE OF ORGANIZATION OF EXISTING ACTIVITY...AND STRENGTH

OF ASSOCIATED WIND FIELD /PER CLE VWP/ SUGGEST POTENTIAL FOR SCTD

DMGG WIND GUSTS AND PERHAPS MARGINALLY SVR HAIL.



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 500. MEAN STORM

MOTION VECTOR 26040.





...CORFIDI

