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WWUS20 KWNS 051012

SEL8

SPC WW 051012

OHZ000-PAZ000-LEZ000-051700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 468

NWS STORM PREDICTION CENTER NORMAN OK

615 AM EDT THU JUL 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN OHIO

       NORTHWEST PENNSYLVANIA

       LAKE ERIE



EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 615 AM UNTIL

100 PM EDT.



HAIL TO 1.5 INCHES 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 45 MILES WEST

NORTHWEST OF MANSFIELD OHIO TO 30 MILES SOUTH SOUTHEAST OF ERIE

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 467...



DISCUSSION...AN MCS WILL CONTINUE TO QUICKLY /45+ KT/ SPREAD

SOUTHEASTWARD ACROSS LAKE ERIE INTO NORTHERN OH/NORTHWEST PA THIS

MORNING...WITH CONCERN FOR DAMAGING WINDS. OTHER PRE-MCS/WARM

ADVECTION-DRIVEN STORMS WILL ALSO BE POSSIBLE...WITH POTENTIAL FOR

BOUTS OF SEVERE HAIL. THIS STORMS ARE BEING AIDED BY THE EASTWARD

ADVECTION OF A MOIST/UNSTABLE AIRMASS JUST ABOVE THE BOUNDARY LAYER

THIS MORNING.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 30045.





...GUYER/MEAD

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