

209 

WWUS20 KWNS 131929

SEL2

SPC WW 131929

INZ000-KYZ000-TNZ000-140200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 412

NWS STORM PREDICTION CENTER NORMAN OK

325 PM EDT SAT JUL 13 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  SOUTHERN INDIANA

  CENTRAL AND EASTERN KENTUCKY

  NORTHERN MIDDLE AND EASTERN TENNESSEE



* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 325 PM UNTIL

  1000 PM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  A FEW DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES EAST

NORTHEAST OF LOUISVILLE KENTUCKY TO 75 MILES SOUTHWEST OF LONDON

KENTUCKY.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



&&



DISCUSSION...SCTD TSTMS...INCLUDING A FEW SUSTAINED STORMS AND

POSSIBLY TRANSIENT SUPERCELLS...EXPECTED TO PERSIST/INCREASE ACROSS

WW AREA IN ASSOCIATION WITH AREA OF GREATEST LOW-LVL DESTABILIZATION

BENEATH RETROGRESSING UPR LOW. UNUSUALLY COOL MID-LVL

TEMPS...MODERATE DEEP SHEAR...AND SUFFICIENT LOW-LVL DIRECTIONAL

SHEAR APPEAR PRESENT FOR STORMS TO POSE A RISK FOR SVR

HAIL...LOCALLY DMGG WIND...AND PERHAPS SHORT-LIVED TORNADOES.



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 450. MEAN STORM

MOTION VECTOR 16025.





...CORFIDI

