MESOSCALE DISCUSSION 0439
   NWS STORM PREDICTION CENTER NORMAN OK
   1151 PM CDT WED APR 10 2013
   
   AREAS AFFECTED...NORTH-CENTRAL INDIANA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 93...
   
   VALID 110451Z - 110615Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 93
   CONTINUES.
   
   SUMMARY...SEVERE TSTM WATCH 93 CONTINUES UNTIL 07Z...WITH AN
   ISOLATED/MARGINAL DAMAGING WIND THREAT CONTINUING ACROSS
   NORTH-CENTRAL INDIANA EARLY IN THE OVERNIGHT.
   
   DISCUSSION...A SEMI-ORGANIZED SQUALL LINE CONTINUES TO STEADILY
   PROGRESS EAST-NORTHEASTWARD AT AROUND 45-50 KT FROM EAST-CENTRAL IL
   INTO WEST-CENTRAL INDIANA...PRIMARILY EXTENDING FROM NEAR I-70/TERRE
   HAUTE NORTHWARD TO WEST OF LAFAYETTE AS OF 0430Z. A 50 KT WIND GUST
   WAS MEASURED IN ASSOCIATION WITH THE SQUALL LINE JUST PRIOR TO 04Z
   IN RANTOUL IL. THE BRUNT OF THIS CONVECTIVE LINE IS FOCUSED ALONG
   AND MORE SO NORTH OF A OUTFLOW BOUNDARY/STATIONARY FRONT. THE
   LOW-LEVEL AIRMASS AHEAD OF THE CONVECTIVE LINE CONTINUES TO STEADILY
   COOL THROUGH THE 50S F...WITHIN A CORRESPONDING INCREASE IN BOUNDARY
   LAYER CINH. THIS SHOULD CONTRIBUTE TO DECREASING CONVECTIVE
   INTENSITY/ORGANIZATION WITH THE CONVECTIVE LINE OVERNIGHT...ALTHOUGH
   ISOLATED STRONG TO PERHAPS SEVERE WIND GUSTS COULD STILL REACH THE
   SURFACE GIVEN THE RELATIVE SHALLOWNESS OF THE SURFACE BOUNDARY AND
   FAST FORWARD MOTION OF THE CONVECTION WITHIN A HIGH SHEAR
   ENVIRONMENT.
   
   ..GUYER.. 04/11/2013
   
   
   ATTN...WFO...ILN...IWX...IND...LOT...
   
   LAT...LON   40458735 40998707 41018491 39758502 39478676 40458735