The following events were reported: Hail, Thunderstorm Wind. These occurred near station USW00013994, approximately 19.5043 km away, between 2012-04-28 13:38:00 and 2012-04-29 00:03:00. The events included records with hailstones measuring 8.17060606060606 inches.The events resulted in 100 injuries and 1 fatalities. No significant property or crop damage was reported. Episode Narrative: An area of low pressure moved east along Interstate 70 corridor with a warm front extending eastward across southern Illinois and a cold front trailing southwestward along I-44. Storms developed over central Missouri and tracked east into southern Illinois mainly along I-70 with numerous reports of large hail between 2 and 3 inches in diameter, as well as a few reports of wind damage. Some storms continued to produce hail into the early morning hours of April 29th before diminishing. Overall there were over 150,000 hail damage claims made in Missouri for a total of $995 million in damages. An area of low pressure moved east along Interstate 70 corridor with a warm front extending eastward across southern Illinois and a cold front trailing southwestward along I-44. Event Narrative:  A wide swath of large hail fell in an area from the Missouri River near Highway 364 eastward through the WestPort Plaza area to near Lindbergh Boulevard. Numerous cars had their windows broken out at WestPort Plaza. Also, numerous homes sustained roof and siding damage. There were numerous reports of one inch to one and a quarter inch hail in Bridgeton. There were numerous reports of golfball sized hail in Overland, with a couple reports of hail to tennis ball size. There were numerous reports of golfball sized hail across St. Ann. There were numerous reports of large hail in Olivette, with some of the stones as large as baseballs. There were numerous reports of large hail across St. John. The largest hail stones were baseball size near the intersection of St. Charles Rock Road and I-170. Numerous reports of large hail with the biggest hail stones being ping pong ball size. Numerous reports of large hail was reported across northern portions of St. Louis County. There were reports of large hail in Hazelwood, Florissant, Ferguson, Black Jack and Riverview. Thunderstorm winds blew down a two and a half foot diameter tree as well as numerous large tree limbs in Brentwood. Baseball sized hail was reported in on the north side of Brentwood. Golfball sized hail was reported in University City and on the Washington University campus. A swath of large hail fell over central portions of the city of St. Louis. Three inch hail was reported at the Edward Jones Dome with golfball sized hail reported at the intersection of Tucker Boulevard and Market Street as well as at the intersection of Hampton Avenue and Interstate 44. Thunderstorm winds blew down several large trees. One tree fell onto a house on Pernod Avenue causing moderate damage. Another tree was blown over onto an unoccupied car on Marquette Avenue near Tilles Park. On Potomac Avenue a large tree was uprooted and landed near a house causing minor roof damage. A fifteen inch diameter tree was snapped off near the intersection of Mackland Avenue and Southwest Avenue. Thunderstorm winds blew plywood and other small pieces of debris onto the westbound lanes of Interstate 70 between mile markers 212 and 213. Source of the debris unknown at this time. About 100 people were injured and one person was killed when a tent collapsed on a crowd that was gathered after a Cardinals game at Kilroy's Sports Bar (720 South Seventh Street). Seventeen people were taken to area hospitals and treated for their injuries. According to radar data and eye witness reports, outflow winds of 50 to 60 mph from the rear flank downdraft of the supercell thunderstorm arrived between 3:40 p.m. and 3:50 p.m. causing the localized damage near Busch Stadium. Another swath of large hail was reported over the northern portions of the city of St. The biggest stones were three inches in diameter.