February 28 event

March 1 event

Perryville, Missouri – Christopher, Illinois

The first EF4 tornado of 2017 began at 01:51 UTC on March 1 (7:51 p.m. CST on February 28) to the west of Perryville in Perry County, Missouri, where it snapped the trunks of several hardwood trees and caused EF1 damage to homes. An outbuilding was destroyed at EF2 intensity near the intersection of Country Road 810 and North Highway. The tornado then continued to the northeast and intensified at an exceptional rate, causing EF4 damage as it impacted a small subdivision of large homes on the west side of I-55. Multiple two-story homes along Kyle Lane were completely leveled. One person was killed in their vehicle as the tornado crossed I-55, and least a dozen cars were mangled and destroyed after being thrown 200–300 yd (180–270 m) from a nearby salvage yard. The tornado then moved across a series of open pastures before crossing US 61 and impacting the northwestern outskirts of Perryville at EF4 intensity. A residential subdivision along Moore Drive in this area sustained devastating damage, with many homes completely leveled, a few of which were swept clean from their foundations. Numerous trees in this area were snapped and denuded, and several vehicles were flipped and tossed. One home in this area was anchor-bolted to its foundation with its wall studs' toe-nailed at both the top and bottom and was completely swept away with only the basement left behind. Despite the high-quality construction, the overall context surrounding this home was not indicative of an intensity greater than mid-range EF4, and maximum winds along this segment of the path were estimated to have peaked at 180 mph (290 km/h).^[97]

The tornado weakened to high-end EF2 strength as it crossed Country Road 906, destroying a garage and collapsing the exterior walls of a residence. As the tornado continued through sparsely populated areas further to the northeast, it produced a mixture of EF2 and EF3 damage to homes. A few homes along this portion of the path were left with only a single interior room standing, and multiple outbuildings were destroyed. Large hay bales from one of the outbuildings were thrown up to 50 yards away. As the tornado crossed the Mississippi River into Illinois, trees along the riverbank were shredded and debarked. The tornado took on a multiple-vortex structure at this point, as evidenced by multiple distinct ground striations in nearby fields, and also attained its peak width of 0.6 mi (0.97 km). Once in Illinois, the tornado continued at EF2 strength as it passed south of Rockwood, snapping hundreds of trees and a few power poles. A house at the edge of the damage path sustained EF0 roof damage. Past Rockwood, the tornado tore through the Shawnee National Forest, downing thousands of trees at EF1 to EF2 strength as it continued to the northeast. EF1 and EF2 damage continued to the south of Ava, as numerous trees were snapped and uprooted and several outbuildings were completely destroyed. East of Ava, many trees, mobile homes, and frame homes sustained considerable damage, and additional outbuildings were destroyed as damage continued to range from EF1 to EF2 in intensity. The tornado then narrowly missed the town of Vergennes to the south, completely destroying a house at EF3 intensity. Outbuildings and large grain silos were destroyed, and trees and power poles were snapped just south of town as well.^[97]

Continuing northeastward past Vergennes, EF2 damage occurred as a small home was largely destroyed, power poles were snapped, outbuildings were destroyed, an antenna was bent, and a dump truck was flipped over. EF2 damage continued as the tornado clipped the northern fringes of Elkville, with multiple homes and outbuildings severely damaged or destroyed in that area. The Powerade Park baseball field complex was also damaged, and many trees were snapped. EF1 damage to trees was observed further to the northeast as the tornado traversed unpopulated swampy areas. The tornado passed south of Campbell Lake and then moved into Franklin County, where it dramatically re-intensified to high-end EF3 strength as it crossed IL 184. A farmhouse at this location was obliterated and swept cleanly away, with the debris shredded and scattered 1 mi (1.6 km) downwind. National Weather Service damage surveyors were unable to recover anything larger than a few wooden 2x4s and some pieces of siding downwind from the foundation. Nearby trees were snapped and denuded as well. Due to the intensity of the damage, the damage at this location was initially assigned an EF4 rating. However, further surveys revealed that the home was not attached to its cinder block foundation, and the rating was subsequently decreased to high-end EF3. Beyond this point, the tornado weakened to EF1 intensity and caused moderate damage to some homes and outbuildings before it lifted at 02:57 UTC (8:57 p.m. CST) to the southwest of Christopher. With a total path length of 53.47 mi (86.05 km), it was the longest-tracked tornado in the county warning area of the Paducah, Kentucky National Weather Service office in 36 years. In addition to the one fatality, twelve people were injured.^[97][98]

Crossville, Illinois – Oakland City, Indiana

A tornado touched down just northeast of Carmi in White County, Illinois at 03:54 UTC on March 1 (9:54 p.m. CST), snapping the trunks of hardwood trees at EF1 strength. It rapidly intensified to EF3 strength farther to the east as it crossed IL 1, completely destroying a single-wide mobile home and rolling four to five vehicles. A residence was moved about 3 ft (1.0 yd) off its foundation, with a majority of its second floor swept away, a four-wheeler flipped upside down, a refrigerator tossed atop the rubble, and an associated garage completely destroyed. A small brick outbuilding nearby was severely damaged, a double-wide mobile home was obliterated, and several power poles were snapped in this area as well. The tornado then crossed 1675 East Street and North 1750 East Street, narrowly missing the city of Crossville to the south. EF3 damage was again inflicted to a residence that sustained major damage to its structure, had its garage destroyed, and had a vehicle rolled about 30 yd (27 m). Just past 1800 East Street, one small barn storing farm equipment was decimated while a larger outbuilding had its main support beams break loose from the concrete pads, forcing the roof beams to buckle. Damage to these structures was rated EF2. Another large barn nearby was severely damaged and a small brick outbuilding was destroyed, with damage to those structures rated EF1.^[97]

Farther along the path, the tornado re-intensified to EF3 strength as it crossed at the North 1935 East Road and East 1975 North Road intersection to the north of Phillipstown. The old part of a home, which had to be rebuilt after being hit by the 1925 Tri-State tornado, was destroyed while the newer part of the structure was damaged. A vehicle from this residence was thrown 30 yd (27 m). Several other structures in this area sustained EF2 damage, including a house that had its roof torn off, two double-wide mobile homes that were destroyed with nearby vehicles displaced, and an outbuilding that was completely destroyed. A house at the edge of the circulation had some of its metal roofing removed as well. The tornado continued towards the Wabash River, downing numerous trees at EF1 intensity as it moved through unpopulated areas.^[97] In total, 35 structures were damaged in the county.^[97]

The tornado crossed the Wabash River into Posey County, Indiana and restrengthened to EF2 intensity, obliterating two metal barns. It veered east-southeast but quickly back east-northeast, causing severe damage to many hardwood trees along its path. Southeast of Griffin, a free-standing light pole was collapsed. The storm narrowed after crossing I-64, but continued to produce EF2 damage to a barn that was flattened. Along Pumpkin Run Road, multiple power poles were snapped, while along Murphy Road, a residence sustained damage to its roof. A nearby house was completely shifted off its foundation, with nearby hardwood trees snapped and uprooted. As the tornado passed north of Poseyville into Gibson County, wooden power poles were snapped and large amounts of debris was strewn throughout a treeline along SR 165. A pocket of EF3 damage was noted as a metal building was totally destroyed with its foundation swept clean. Cars at the structure were tossed 15 yd (14 m), 6x6 poles were snapped at the concrete, and two double-wide mobile homes were destroyed with their metal frames tossed 50–75 yd (46–69 m). An anchor-bolted frame home had one of its walls, its windows, and its stella doors blown out. Another nearby home had a large section of its roof ripped off, sustaining EF2 damage. Along South County Road 1075 West, EF2 damage continued as power poles were snapped, a mobile home was destroyed, and hundreds of trees were snapped and uprooted. Continuing northeast, a steel barn was destroyed and hundreds of additional trees were snapped. The tornado then produced another area of EF3 damage as it destroyed a brick home. The house had its roof ripped off, exterior walls collapsed, and had its attached garage destroyed. An occupant of this home was left trapped in the debris after the tornado and had to be dug out.^[97]

Farther along the path, the tornado weakened back to EF2 strength as a residence to the southeast of Owensville had its entire roof destroyed and sustained damage to its concrete block walls, while several nearby outbuildings were damaged. EF2 damage continued as it crossed SR 168 to the west of Fort Branch, tearing off large sections of roof from homes and crumpling large grain bins. The tornado weakened as it affected areas just north of Fort Branch, but still caused considerable high-end EF1 roof damage to several homes and downed many trees. To the northeast of Fort Branch, EF1 damage continued as homes sustained roof damage, including a brick home that lost about 1/4 of its roof. A metal building had part of its roof ripped off and walls pushed in along South County Road 550 East, while a final pocket of EF2 damage was noted farther along the path just west of I-69, where a barn was completely destroyed. The final observed damage was to a barn south of Oakland City that had half of its roof torn off and gable blown out at 04:45 UTC (10:45 p.m. CST), marking an end to the tornado's 44.6 mi (71.8 km) path. Damage to this last structure was rated EF1. In all, 106 structures were damaged in Gibson County, of which 33 suffered minimal damage, 26 suffered minor damage, 21 suffered major damage, and 26 were destroyed. One person was killed, and two others were injured by this tornado,^[97] all in Illinois.^[99]