The following events were reported: Hail, Lightning, Thunderstorm Wind, Tornado. These occurred near station USW00013960, approximately 18.0817 km away, between 2011-05-24 19:17:00 and 2011-05-24 21:40:00. The events included records with hailstones measuring 28.766666666666666 inches.The events resulted in 1 injuries and 1 fatalities. The events caused property damage valued at 892000.0 and crop damage of 0.0. Episode Narrative: Three rounds of thunderstorms affected north Texas with 10 tornadoes confirmed. The atmosphere was highly unstable on this day and a High Risk was issued by the Storm Prediction Center for the northwestern counties of north Texas while a Moderate Risk covered much of the rest of north Texas. A strong upper level disturbance approaching from the west interacted with a dryline across the western portions of north Texas, and the first round of storms began to develop around 330 pm in the western counties. The first two rounds of storms remained along and north of Interstate 20 but the third round of storms later that night moved through most of the region as a line of storms. The most significant tornado occurred in the western limits of the city of Denton where EF-2 damage occurred. An EF-1 tornado also occurred in the city of Irving in Dallas County, and softball sized hail fell in the northern portions of the Metroplex. In the city of Dallas, one person died from electrocution after going outside around live, downed wires after a storm had passed. Three rounds of thunderstorms affected north Texas with 10 tornadoes confirmed. Event Narrative: Lightning struck a tree in the Fair Park area of Dallas. The tree split and part of the tree fell on a nearby home, crashing through the roof and causing a wall to collapse. Thunderstorm winds were estimated to be 65 MPH in Richardson. A very brief tornado occurred along the Trinity River bottom south of Interstate 20 in southeast Dallas County. Some minor tree damage occurred, and this tornado was rated an EF-0. A 62 MPH wind gust was measured near the intersection of Highway 78 and CR 549 on the east side of Lake Lavon. Power flashes were also reported. Large trees were knocked down in Highland Park. Ping pong ball sized hail was reported near downtown Dallas. A NWS Storm Survey determined that straight-line winds damaged several trees at an apartment complex in the Oak Lawn area of Dallas, located southeast of Dallas Love Field Airport (KDAL). Power lines were also knocked down, and a man died of electrocution from the fallen power lines. It is believed he went outside after the storm had passed and was electrocuted by the power line laying on the ground, possibly hidden under a fallen tree branch or leaves. Large tree branches were broken off and wood fences were knocked down just southeast of downtown Dallas. Hail up to the size of grapefruits was reported around Irving for several minutes. Windows were broken or smashed out by the hail. The hail also damaged the TPC Four Seasons Las Colinas Country Club and golf course where the PGA's Byron Nelson Golf Championship was being held. Crews had to repair over 4,000 divots on the golf course before play could resume the next day. The greens of seven holes were significantly damaged. The hail at the golf course was reported to be up to baseball size. Quarter sized hail was reported in the Parkdale area of Dallas, southeast of downtown Dallas. A large tree, approximately 2-4 feet wide, was lying across Beltline Road northeast of Wilmer. Baseball sized hail fell just south of Crandall. Golfball sized hail fell 5 miles west of Kaufman. Baseball sized hail fell at Skillman Street and Southwestern Blvd in Dallas. Golfball sized hail was reported at Highway 183 and Mockingbird Lane in northwest Dallas. The hail also impacted operations at nearby Dallas Love Field Airport (KDAL) where 8 Southwest planes were damaged. A 70 MPH wind gust was estimated in Plano. A police officer was struck by lightning at the intersection of Loop 12 and Shady Grove Road. He was hospitalized but in good condition.