

146 

WWUS20 KWNS 271734

SEL3

SPC WW 271734

OHZ000-PAZ000-WVZ000-LEZ000-280000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 303

NWS STORM PREDICTION CENTER NORMAN OK

135 PM EDT SUN MAY 27 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST OHIO

       WESTERN PENNSYLVANIA

       NORTHERN WEST VIRGINIA PANHANDLE

       LAKE ERIE



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 800

PM EDT.



HAIL TO 1 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 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES WEST

NORTHWEST OF AKRON OHIO TO 40 MILES EAST SOUTHEAST OF FRANKLIN

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



DISCUSSION...LOOSELY ORGANIZED BUT LONG-LIVED TSTM COMPLEX CROSSING

LAKE ERIE ATTM SHOULD MOVE ACROSS PORTIONS OF THE SRN LAKE ERIE

SHORELINE OVER THE NEXT HOUR OR SO. THIS COMPLEX APPEARS TO BE

DRIVEN BY A MID LEVEL IMPULSE ACCOMPANIED BY 40-50KT WINDS CRESTING

LARGER SCALE RIDGE AXIS. AIRMASS ACROSS OH AND PA HAS BECOME WARM

AND MODERATELY UNSTABLE AND MAY SUPPORT A CONTINUATION OF THE MCS

ACROSS THESE AREAS THROUGH THE AFTERNOON. PRIMARY THREAT SHOULD BE

IN THE FORM OF STRONG TO OCCASIONAL SEVERE WIND GUSTS.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION

VECTOR 31030.





...CARBIN

