The following events were reported: Flood, Hail, Thunderstorm Wind. These occurred near station USW00013897, approximately 37.3524 km away, between 2017-03-21 15:09:00 and 2017-03-21 16:30:00. The events included records with hailstones measuring 49.214285714285715 inches. The flood was caused by Heavy Rain. Thankfully, no injuries or fatalities were reported. The events caused property damage valued at 130000.0 and crop damage of 0.0. Episode Narrative: A line of severe thunderstorms called a Mesoscale Convective System (MCS) moved across Middle Tennessee on Tuesday, March 21, 2017, impacting areas mainly south of Interstate 40. This MCS moved into Middle Tennessee around 230 PM CDT, and additional scattered thunderstorms also developed out ahead of the MCS. Numerous reports of large hail and damaging winds were received with these storms before all of the storms exited the area by early evening.||Due to high amounts of instability in the atmosphere and unusually steep lapse rates aloft, very large hail was reported in several areas. Some of the largest hail was reported in Lewisburg, where hail up to 2 inches in diameter covered the ground and caused significant damage to roofs and vehicles. Golf ball size hail was also reported in Waynesboro (Wayne County), with ping pong ball size hail in Hampshire (Maury County) and Summertown (Lawrence County).||Some of the worst wind damage occurred along a segment of the MCS called a bow echo, which is commonly associated with damaging winds. This bow echo moved from Williamson and Rutherford Counties across Cannon, Coffee, Warren, Van Buren, and Grundy Counties during the late afternoon hours. Based on damage reports, photos, and radar data, winds are estimated to have reached over 90 mph in parts of these counties. Damage included a roof blown off a school in Christiana (Rutherford County); numerous trees and power poles snapped, a tractor trailer blown over onto a car, and structural damage to a few homes in Murfreesboro (Rutherford County); structural damage to homes and barns being destroyed near the Iconium community (Cannon County); numerous trees falling on campers and RVs in Fall Creek Falls State Park (Van Buren County); and numerous trees, power lines, and power poles knocked down in Manchester (Coffee County). A line of severe thunderstorms called a Mesoscale Convective System (MCS) moved across Middle Tennessee on Tuesday, March 21, 2017, impacting areas mainly south of Interstate 40. Event Narrative: A tSpotter Twitter report indicated a tree was blown down on Gosey Hill Road in Peytonsville. Several trees were blown down in Rockvale. Tspotter Twitter reports indicated multiple trees were blown down in East Murfreesboro. A NWS storm survey found a severe 1.5 mile long by 1 mile wide microburst caused significant wind damage along Highway 231 in Christiana. A few homes west of Highway 231 north of Stones River Road suffered minor roof damage and some trees were blown down. More significant wind damage occurred along Highway 231, where a large portion of the roof was blown off the Christiana Elementary School, two homes suffered roof damage, and part of the metal roof was blown off a barn. Minor roof damage occurred to more homes east of Highway 231 along Parsons Road and Steeplechase Road and several more trees were blown down. Winds were estimated from 60 to 80 mph. A tSpotter Twitter report indicated a tree fell on a house on Cason Lane causing major damage to the home. A tSpotter Twitter report indicated trees and powerlines were blown down in Bellevue. Several trees were snapped near the World Outreach Church on Highway 99. Photos showed flooding near a Dollar General store on Old Nashville Highway at Davis Park Drive with one car submerged in a drainage ditch. Three power poles were snapped on Barfield Road. Quarter size and larger hail was reported on Manchester Pike near Murfreesboro. A tSpotter Twitter report indicated a tree was blown down in the Franklin Green subdivision. Photos show quarter size hail fell in Rockvale. Multiple trees were blown down across Murfreesboro. A tSpotter Twitter photo showed an old barn was destroyed near College Grove. Photos and video showed a tractor trailer was blown over on top of a car on Highway 231 near I-24.