

165 

WWUS20 KWNS 051811

SEL4

SPC WW 051811

INZ000-KYZ000-MDZ000-OHZ000-PAZ000-WVZ000-060100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 264

NWS STORM PREDICTION CENTER NORMAN OK

210 PM EDT SAT JUN 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR EASTERN INDIANA

       NORTHERN KENTUCKY

       FAR WESTERN MARYLAND PANHANDLE

       MUCH OF OHIO

       WESTERN PENNSYLVANIA

       NORTHERN WEST VIRGINIA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

900 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES NORTHWEST OF

CINCINNATI OHIO TO 5 MILES NORTH OF LATROBE PENNSYLVANIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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 262...WW 263...



DISCUSSION...LINE OF STORMS HAS RECENTLY DEVELOPED IN ERN

INDIANA...AHEAD OF AN MCV. THIS LINE IS EXPECTED TO INTENSIFY AND

ACCELERATE EWD WITH AN INCREASING DAMAGING WIND THREAT. OTHER STORMS

WERE SCATTERED AHEAD OF THE LINE AND WILL ALSO LIKELY INTENSIFY INTO

SUPERCELLS AS THEY SHIFT EWD. THE GREATEST SEVERE THREAT WITH THESE

STORMS WILL BE LARGE HAIL.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 29030.





...IMY

