Tough one. I'm 32 years old and have lived in Indianapolis for 18 years now. I'll list a few that are up there though. May 30, 2004 because it was the first big severe weather outbreak day I really remember and I had just moved to Indy from the UP of Michigan about a month earlier. December 22-23 2004 for obvious reasons lol. April 14, 2006 I experienced the most intense still in my life thunderstorm with baseball size hail and 90 mph winds. January 27-28 2009 winter storm we're Indy got 12.5 inches. My house i measured 14!. July 20, 2011 highest heat index I've been in 116 with 98 degrees and 79 dew point. January 5 2014 Polar Vortex Storm. Favorite outside my area probably 4/27/2011 5/22/2011