

629 

WWUS20 KWNS 110458

SEL5

SPC WW 110458

KYZ000-OHZ000-111000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 275

NWS STORM PREDICTION CENTER NORMAN OK

100 AM EDT WED MAY 11 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN KENTUCKY

       WESTERN OHIO



EFFECTIVE THIS WEDNESDAY MORNING FROM 100 AM UNTIL 600 AM EDT.



HAIL TO 2 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 35

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH OF

DAYTON OHIO TO 55 MILES SOUTHEAST OF JACKSON KENTUCKY.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



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 271...WW 272...WW

273...WW 274...



DISCUSSION...NARROW AXIS OF THUNDERSTORMS CONTINUES TO DEVELOP OVER

WESTERN OH IN REGION OF LOW LEVEL WARM ADVECTION.  SUFFICIENT

INSTABILITY PERSISTS FOR A RISK OF LARGE HAIL AND LOCALLY DAMAGING

WINDS FOR SEVERAL MORE HOURS ACROSS THE WATCH AREA.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 34030.





...HART

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