

886 

WWUS20 KWNS 192012

SEL6

SPC WW 192012

INZ000-KYZ000-OHZ000-200400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 496

NWS STORM PREDICTION CENTER NORMAN OK

415 PM EDT THU JUL 19 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       INDIANA

       FAR NORTHERN KENTUCKY

       SOUTHWEST OHIO



EFFECTIVE THIS THURSDAY AFTERNOON FROM 415 PM UNTIL MIDNIGHT EDT.



HAIL TO 1.5 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH

NORTHWEST OF MUNCIE INDIANA TO 45 MILES SOUTHEAST OF BLOOMINGTON

INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 495...



DISCUSSION...SFC LOW ALONG THE IL-IND BORDER N OF DNV IS EXPECTED TO

DEVELOP SEWD INTO CNTRL IND THIS EVENING WITH ASSOCIATED OUTFLOW

BOUNDARY-WARM FRONT RETREATING EWD THROUGH CNTRL IND.  CONVERGENCE

INVOF SURFACE LOW AND SFC BOUNDARY ARE EXPECTED TO FOSTER AN

INCREASE IN STORMS THIS AFTERNOON WITHIN AN ENVIRONMENT

CHARACTERIZED BY MLCAPE OF 2500-3500 J/KG AND VERTICALLY VEERING

WIND PROFILES WITH 30-35 KT OF DEEP-LAYER SHEAR.  RESULTANT SETUP

WILL SUPPORT SUPERCELL STRUCTURES CAPABLE OF LARGE HAIL...DAMAGING

WINDS...AND PERHAPS A TORNADO.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 32025.





...MEAD

