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098 

WWUS20 KWNS 120121

SEL5

SPC WW 120121

INZ000-KYZ000-OHZ000-WVZ000-120900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 635

NWS STORM PREDICTION CENTER NORMAN OK

920 PM EDT MON JUL 11 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST INDIANA

       NORTHERN KENTUCKY

       CENTRAL AND SOUTHERN OHIO

       NORTHWEST WEST VIRGINIA AND THE PANHANDLE



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 920 PM UNTIL

500 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST

NORTHWEST OF CINCINNATI OHIO TO 45 MILES EAST SOUTHEAST OF

PARKERSBURG WEST VIRGINIA.  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 629...WW 631...WW

632...WW 633...WW 634...



DISCUSSION...MCS EVOLUTION IS UNDERWAY ACROSS WATCH AREA...FUELED BY

A MODERATELY SHEARED AND EXTREMELY UNSTABLE AIR MASS PER 00Z ILN

SOUNDING.  SYSTEM COLD POOL SHOULD CONTINUE TO STRENGTHEN LATE THIS

EVENING WITH THE PROBABLE SSEWD ACCELERATION OF MCS WITH ATTENDANT

THREATS FOR DAMAGING WINDS AND LARGE HAIL.



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 29030.





...MEAD

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