Newton Falls–Niles, Ohio/Wheatland–Hermitage, Pennsylvania

This extremely violent tornado began in eastern Ohio and tore directly through the towns of Niles, Ohio, and Wheatland, Pennsylvania, producing F5 damage at both locations. The tornado killed 18 people and injured 310, and was the most violent and deadly of the 44 recorded that day. Registering F5 on the Fujita scale, it remains the only F5 in Pennsylvania history,^[7] the last F5 in Ohio to date, and was also the most violent tornado reported in the United States in 1985.^[8]

It first touched down in Ohio near the Ravenna Arsenal in Portage County around 6:30 PM EDT. Gathering strength, it moved quickly into Newton Falls in Trumbull County causing F3 to F4 damage through much of the town. While nearly 400 homes were heavily damaged or destroyed, no fatalities were recorded in Newton Falls, due to the storm-readiness of local authorities and its tornado siren.^[9][10] Additional homes were completely destroyed as the tornado struck the north side of Lordstown.^[11] Continuing east, the tornado reached F5 intensity as it tore through the north side of Niles. Hundreds of homes in the Niles area were destroyed, including several homes with anchor bolts that were swept away with the debris scattered downwind. The Niles Park Plaza shopping center was completely leveled and partially swept away at F5 intensity, with several of the fatalities occurring at that location. Steel girders were buckled at the shopping center, and a nearby retirement home and a skating rink were leveled as well. As the tornado struck an industrial area in Niles, large 30-foot tall metal petroleum storage tanks (each weighing 75,000 pounds) were torn from where they were anchored and thrown, some of which were tossed or bounced considerable distances. One of the tanks was found in the middle of a road, 60 yards from where it originated. The tornado weakened slightly as it tore through the north side of Hubbard and through the center of Coalburg, though many additional homes were still leveled in those areas.^[11][12][13]

As the tornado crossed the state line and reached Wheatland, Pennsylvania, it was a half-mile (0.8 km) wide and had regained F5 strength. A steel-frame trucking plant in Wheatland was obliterated and partially swept away at F5 intensity, as the building's steel girder frame was mangled into a pile and pushed off of the foundation. At nearby Wheatland Sheet and Tube, sections of pavement were scoured from the parking lot, and shards of sheet metal and routing slips were left wedged beneath the remaining asphalt. Ninety-five percent of Wheatland's business and residential area were destroyed. According to Storm Data from the National Weather Service, the destruction of the town "resembled that of a bombed-out battle field." Continuing east, the tornado weakened slightly but remained violent as it struck Hermitage, damaging or destroying 71 homes along with the town's airport, destroying several hangars and planes. A wing from one of the planes was found 10 miles away in Mercer. Another trucking steel processing plant was heavily damaged in Hermitage as well. The tornado then destroyed 15 homes and damaged 30 others in the Greenfield area before finally dissipating.^[11][12][13]

In Ohio, it was the deadliest tornado since the Xenia F5 during the Super Outbreak of April 3, 1974. The tornado was also captured on camera by several residents.

Other U.S. tornadoes

Described as "one of the most impressive tornadic events of the 20th century" by meteorologist and researcher Thomas Grazulis, a massive, high-end F4 tornado tracked for 69 miles (111 kilometers) through dense forest in central Pennsylvania.^[14] Near the beginning of its path, a few homes were heavily damaged and some outbuildings were destroyed, but otherwise, the tornado passed entirely through uninhabited areas in the Moshannon and Sproul State Forests. Surveyors estimated the damage path to be at least two and a half miles wide,^[14] with more than 90,000 trees obliterated. The tornado also generated tremors that set off local seismometers, and even the primitive WSR-57 weather radar in State College picked up a distinct reflectivity spike (also known as a "debris ball"), due to the large amount of trees and other vegetation being uprooted and lifted into the air as the tornado passed through the forest north of Interstate 80.^[15]

The second-deadliest tornado in Pennsylvania history touched down in Trumbull County, Ohio, just yards away from the Pennsylvania state line, and tracked for 56 miles through northwestern Pennsylvania. Rated F4, the tornado struck Jamestown in northwestern Mercer County, Atlantic and Cochranton in southern Crawford County, and Cooperstown in northern Venango County, narrowly missing Oil City to the north before dissipating south of Tionesta in western Forest County.^[15]

One deadly tornado impacted the Pittsburgh metropolitan area. Rated F3, the tornado tracked for 39 miles through northern Beaver County and southern Butler County in southwestern Pennsylvania, approximately 20 miles north of Pittsburgh, narrowly missing the northernmost suburbs of the city. In Big Beaver, two people were killed when the Big Beaver Plaza was destroyed, along with more than 100 vehicles in the parking lot. Across the Beaver River from the shopping plaza, 16 antique vehicles were destroyed in a garage on River Road.^[16] Despite being rebuilt in 1987, business never recovered at the shopping plaza, which sits vacant today.^[17] In North Sewickley Township, the tornado struck the junction of PA 65 and PA 588, destroying the Spotlight 88 Drive-In Theater, a gas station, three homes and two other businesses.^[16] The drive-in theater was never rebuilt, and the site is used as Spotlight 88 Flea Market today.^[18] In Butler County, the tornado crossed Interstate 79, where it blew a southbound van a quarter of a mile off the highway. The family of four inside the van was ejected, but survived.^[16] A trailer park near Evans City was destroyed, as was another trailer on Water Station Road, where two people were killed.^[16] Near Callery, 40 homes were destroyed. People in the area reported pieces of sheet metal and shreds of pink insulation falling from the sky shortly before the tornado arrived.^[16] Near the end of its path, the tornado killed a babysitter and a young girl near Saxonburg, before dissipating near Sarver. In all, this tornado killed nine people, injured 120, and caused more than $10,000,000 of damage in Beaver County.^[16]

Three tornadoes were reported in New York: two in Chautauqua County, and one in St. Lawrence County. The first tornado, rated F4, crossed into New York from Erie County, Pennsylvania, and tracked for 28 miles (16 in Pennsylvania, 12 in New York), striking Clymer and Harmony in southwestern Chautauqua County before dissipating. The second tornado, rated F3, touched down in southeastern Chautauqua County and tracked for 13 miles, striking Kiantone, Carroll and Poland, and narrowly missing Jamestown to the east. The third tornado, rated F1, touched down in northern St. Lawrence County, and was produced by a supercell that crossed into the North Country from Ontario. This tornado tracked for five miles, passing north of Norfolk.

In all, 65 people were killed in Pennsylvania, which remains the highest death toll in a tornado outbreak in Pennsylvania history.^[15]

The Hopeville to Barrie supercell

At about the same time the Lion's Head tornado dissipated, two very severe thunderstorms had developed (that likely owed their inception, at least partially, to lake breeze convergence): one to the east of Clinton and another farther to the north, in the Walkerton area. These two developing supercells would grow into a pair of devastating storms within the next hour—likely the most prolific tornado producers in Canadian history to date.

The second tornado of the day touched down south of Hopeville around 3:45pm, causing some localized F3 damage along its track. This tornado lifted after a 17-kilometre (11 mi) path, but another tornado quickly formed just north of Corbetton, in northern Dufferin County, at about 4:15pm.^[19] It stayed over rural areas for most of its 40-kilometre (25 mi) path, however a few homes (especially in the Terra Nova and Mansfield area) sustained F3 damage. It has been disputed whether this path was of two separate tornadoes or just one. Shortly after this tornado dissipated, there were hints of another brief touchdown near Angus in the Blackdown Park training area of Canadian Forces Base Borden (north of Alliston). The next tornado was the last of this storm, but was the most infamous one. It formed in southern Simcoe County (Essa Township), less than 10 kilometres (6.2 mi) southwest of Highway 400 and the Barrie city limits.

At approximately 4:00pm, all electrical power in Barrie went out, as the Grand Valley/Tottenham tornado took out the main hydro transformers, southwest of the city (LeGrand, 1990). Few residents were aware of the tornado, but many people were let off work 30–45 minutes before the storm hit due to these power outages. Had this not happened, the death toll would have been higher.^[20] The intensifying tornado first obliterated a pine tree forest plantation. Some 10-metre (33 ft) high trees were snapped at the 2-metre (6 ft 7 in) level. At this point the damage path was about 600 metres (2,000 ft) wide, moving steadily towards the east-northeast. It then entered the southern part of Barrie shortly before 5:00 pm. Visibility was very low as the tornado was cloaked in heavy rain and dust. Extensive F3 and localized F4 damage occurred to an entire square block of homes in the Crawford Street and Patterson Road subdivision. Five people were killed in the area as some homes there were not well-built, and thus collapsed after being pushed off their foundations.^[20] Most of the fatalities occurred in homes with no basements, where head and chest trauma resulted from an increased exposure to flying debris.

Next, the tornado hit an industrial complex (known then as Molson Park). One person died at a tire retreading facility while at least fifteen other businesses were damaged or destroyed (Bruineman, 2010). Steel I-beams were twisted out of shape, and splinters of wood were found embedded into nearby concrete walls. The tornado then proceeded to cross Highway 400 at Essa Road (former Highway 27) interchange, just missing the Barrie Racetrack to the south. The grandstand was heavily damaged and several barns nearby were destroyed. A man was killed after he was sucked out of his parked car in an adjacent lot (Bruineman, 2010). Several vehicles traveling on Highway 400 were tossed into the ditch, their drivers escaping with only minor injuries. Highway guard rails were found wrapped around telephone poles nearby. Many cars were also found with puncture holes in their frames, owing to the flying debris. As the tornado crossed the highway, it moved into the Allandale subdivision.

Many homes sustained severe damage there, with much of their upper floors missing. By this time the tornado's path had narrowed to about 300 metres (980 ft). The track moved from Debra Crescent to Joanne Court with more extensive damage. Near Tower Crescent, the path narrowed to a comparatively small 50 metres (160 ft).^[20] On Briar Road, homes sustained only minor damage, indicating that the tornado had weakened, but the next road east, Trillium Crescent, sustained heavy damage indicating that it had strengthened once again. Four warehouses near Highway 11 were ripped apart. It then hit the Tollendal Woods and Minets Point area, taking out the Brentwood Marina and a nearby subdivision. A boy was killed in this area while trying to bicycle home (Bruineman, 2010). More than thirty boats, accompanied by their concrete moorings, were tossed into Lake Simcoe and never to be recovered.^[20] The tornado then moved out over Kempenfelt Bay where it became a waterspout for a brief time before weakening out completely. It came very close to the opposite shore, but no damage was reported there. Large quantities of debris from the city were later found floating in the bay, however. Despite the tornado's relatively short path length (under 10 kilometres (6.2 mi)), eight people died in Barrie with 155 injured, and as many as 300 homes were damaged or destroyed.^[21]

The Grand Valley to Tottenham supercell

The storm which had initially developed east of Clinton produced a new tornado a couple kilometres north of Arthur by 4:15 pm. Many power lines and hydro towers were destroyed early in its lifetime (including those used to deliver electricity from the Bruce Nuclear Generating Station to northern and western parts of the Greater Toronto Area). The tornado quickly widened, intensified and reached violent proportions by the time it reached the small crossroads community of Grand Valley just before 4:30pm.^[4] At that point the tornado's damage path was approximately 200 metres (660 ft) wide.

The tornado caused major damage in the small town, where two people were killed. An elderly woman visiting from Scotland died as the home was destroyed, and a man was killed in his pickup truck on a nearby farm (Bruineman, 2010). The worst damage was found along Amaranth Street (running west to east, parallel to the tornado's path) where the local library, three churches, and many other homes were severely damaged or destroyed. Approximately sixty structures in total sustained damage. The most severe was on the north side of the street, where some homes exhibited classic F4 damage. The library roof was found some 200 metres away on a nearby house (Bruineman, 2010).

Continuing eastward through more open country, it brushed the northern outskirts of Orangeville about fifteen minutes later (Grazulis, 2001) where the southern portion of the Mono Shopping Plaza completely collapsed (injuring 67 people, one of them seriously). It then caused extensive damage to approximately fifty buildings (many of which were only recently built) about 2 kilometres (1.2 mi) south of the town of Tottenham at around 5:00 pm. Two more people died here, as an elderly man was crushed under an equipment shed on his farm and a woman was killed in her home (Bruineman, 2010). The tornado continued moving to the east-northeast, crossing Highway 400 into York region. It just missed the cities of Newmarket and Bradford before lifting west of Mount Albert at 5:25pm, with a path length in excess of 100 kilometres (62 mi), thus becoming a Canadian record that still stands today. When the earliest tornado track maps were published within the next year, they showed this particular tornado to have tracked almost twice as far towards the Peterborough area before dissipating.^[22] In more recent years this theory has proved to be incorrect; it is likely that this supercell was also a cyclic one.