URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 176 NWS STORM PREDICTION CENTER NORMAN OK 235 PM CDT THU MAY 22 2014 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EXTREME SOUTHERN ILLINOIS WESTERN KENTUCKY SOUTHEAST MISSOURI NORTHERN AND MIDDLE TENNESSEE * EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 235 PM UNTIL 1000 PM CDT. * PRIMARY THREATS INCLUDE... SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF CAPE GIRARDEAU MISSOURI TO 10 MILES NORTH OF KNOXVILLE TENNESSEE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 172...WW 173...WW 174...WW 175... DISCUSSION...THUNDERSTORMS ARE BEGINNING TO FORM ALONG A WEAK BOUNDARY EXTENDING ACROSS KY. THESE STORMS WILL INTENSIFY AND BUILD SOUTHEASTWARD ACROSS THE WATCH AREA THROUGH THE AFTERNOON AND EARLY EVENING. A VERY UNSTABLE AIRMASS AND SUFFICIENT WINDS ALOFT WILL PROMOTE A RISK OF DAMAGING WINDS AND HAIL IN THE STRONGER CELLS. 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. ...HART

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