List of all reported & documented Tornadoes in Ontario:
- July 27, Two tornadoes touched down in Southern Ontario from the result of severe thunderstorms. The first was rated an EF1 and touched down south of Grand Bend, Ontario, snapping hydro poles and knocking over trees. Some homes and vehicles were also damaged with one serious injury reported. The second confirmed tornado was reported by storm spotters near Milbank, Ontario, 30 km nothwest of Kitchener. Spotters described seeing swirling dust and debris at the bottom of a funnel cloud, indicating that a tornado briefly formed. The tornado was given an low EF0 rating and no damage was reported.
- July 15, Two EF0 tornadoes were confirmed near North Bay, Ontario, after strong thunderstorms moved through the area. The first was actually a waterspoutover Lake Nipissing, but Environment Canada included it in the tornado count since it was associated with a thunderstorm over a small body of water. The second tornado touched down just south of North Bay Airport. No damage was reported with either twister.
- July 7, A brief tornado was reported and later confirmed near Norwich, Ontario, south of Woodstock. Environment Canada confirmed the tornado thanks to photographic evidence and was given a low rating of EF0. No injuries or damage was reported.
- June 30, A confirmed EF0 tornado touched down over Bear Lake, Ontario, and was caught on video by a boater. The video shows the tornado crossing the lake and then head inland, where it quickly dissipated. Only minor tree damage was reported.
- June 24, Southern Ontario again saw 2 tornadoes confirmed, spawning from the same storm system. The first, an EF1, travelled 7 km from Orangeville, Ontarioto Amaranth, destroying an RV and causing damage to the roof of a house. It also downed numerous trees and snapped hydro poles. The second, also anEF1, happened around a half hour later in the town of New Tecumseth, northeast of Orangeville. It damaged 18 properties along a 10 km path, including a horse barn where one horse perished. A house also sustained major damage to the garage where the roof was torn off. No injures were reported from either twister.
- June 17, Two tornadoes were confirmed in Central Ontario, the first being a high-end EF2, which hit the town of Angus. Around 100 homes were either destroyed or sustained damage before the twister dissipated in the South end of Barrie. A tornado warning was in effect for the area at the time, and only a few minor injuries were reported. The second tornado, an EF1, touched down near the Stroud area, and left a 750 metre path of uprooted trees and destroyed a farm shed. The same system also produced two unconfirmed tornadoes, one in Grey County, near Owen Sound Airport, and another near the town ofHanover.
- June 13, A confirmed tornado touched down northwest of Gleichen, Alberta in the early evening hours. Two funnel clouds were noticed with one briefly touching the ground. No damage was reported.
- May 26, An EF0 tornado touched down near Roxton Falls, Quebec, tearing the roof from a farm building.
- May 13, Environment Canada confirmed two tornadoes touched down in Southern Ontario. The first, an EF1, touched down in the Midlmay area, 100 km northwest of Kitchener. The small twister had a 2 km path and was around 150 meters wide. A house and barn sustained damage and multiple trees were snapped. The second tornado was rated an EF0, and spotted southeast of Listowel, near Conestogo Lake. The path was approximately 8 km long, with no significant damage.
- April 18, Environment Canada confirmed that an EF1 tornado touched down near the community of Melancthon, northwest of Shelburne, Ontario, destroying a large riding stable. The path of the twister was 10 kilometres long and was around 75 metres wide. No injuries were reported. Ontario Tornado Watch’s founder; Adam Skinner witnessed the destruction of the riding stable and nearly missed being hit by the 7,500 square foot roof as it was thrown towards his vehicle. This tornado also represented the change from Fujita scaleto Enhanced Fujita scale in Canada
- May 21, Three tornadoes were confirmed in Central Ontario after strong thunderstorms moved across the region. The highest rated was an EF2, which touched down near Glenarm, Ontario, 12 km west of Fenelon Falls. The roof of a home was torn off by the strong winds. The other 2 tornadoes were rated EF0; the first touching down in the community of Elmvale, Ontario, south of Midland, and the other near Dalston, Ontario, 12 km north of Barrie. Minor damage was reported to a barn roof and silo, and around 65 mature trees were uprooted.
- May 22, An EF0 tornado touched down on highway 401 near Mallorytown, Ontario. It occurred at 10:30 PM and forcibly moved a truck.
- May 29, An EF0 tornado touched down near Casselman, Ontario, and was confirmed by Environment Canada thanks to amateur video of the funnel cloudlowering. Minor wind damage was reported along a narrow path of 9 km in length.
- June 1, An EF0 tornado touched down near Kenilworth, Ontario, and was on the ground for around 1 minute. Because of the remote location, no damage was reported.
- June 16, A low-end EF0 tornado was confirmed near Beaver Lake, Ontario, about 46 km southwest of Sudbury. The tornado was confirmed based upon photographic evidence, showing a weak funnel cloud rotating and briefly reaching the ground. No damage was reported.
- June 28, Ontario’s 9th confirmed tornado of the season struck near the town of Springwater, Ontario, about 10 km northwest of Barrie. It was rated as a low end EF0, and no damage was reported.
- July 19, A weak EF0 tornado touched down near the community of Teviotdale, Ontario, just south of Mount Forest. No injuries or damage was reported.
- July 29, Environment Canada confirmed an EF0 tornado touched down in Ottawa, Ontario, close to Orleans. Most of the damage was confined to the Pine View Golf Course where it left a 100 metre-wide path and uprooted more than 20 trees. No injuries were reported.
- August 1, A low end EF0 tornado was confirmed near Carleton Place, Ontario, abot 45 km west of Ottawa. Environment Canada used an eye-witness account to confirm the twister. No damage was reported.
- August 2, Environment Canada confirmed an EF0 touched down in Magiskan Lake, Ontario, north of Cochrane. No injuries or damage was reported.
- August 7, Three EF0 tornadoes were confirmed in south-central Ontario within a 1 hour period, thanks to video and photographic evidence. The first tornado touched down north of Orillia, Ontario, followed by another between Arthur and Grand Valley. The third twister happened near Carnarvon, Ontario. No injuries or major damage was reported.
- September 1, A confirmed tornado touched down near Fergus, Ontario in a farmer’s field. Environment Canada classified it as a low end EF0 tornado since no damage was reported. Another tornado was reported just 30 minutes later in a field west of Salem, Ontario, 25 km northwest of Guelph. It was also rated as a low end EF0 in strength
- November 23, A rare, late season tornado was confirmed north of Prescott, Ontario. The tornado was rated as an EF1, and caused significant structural damage to a farm silo. No injuries were reported.
- May 22, A late-afternoon F0 tornado touched down in a field east of Orono, Ontario. It dissipated quickly, and no injuries or damage was reported.
- May 29, A confirmed F0 tornado touched down east of Ottawa, in the small community of Bourget. The tornado was short lived and caused minor roof damage and uprooted trees.
- June 18, An F1 tornado touched down near Sioux Lookout, Ontario, knocking down several trees.
- July 17, Two tornadoes were confirmed in Eastern Ontario, hitting the small communities of Athens and Summerstown. The Athens tornado was rated an F1, with winds speeds estimated at 140 km/h at touchdown. It left a track of damage 300 meters wide and about 3 km long. Several trees were snapped off or uprooted, damaging houses and cars. A farm just west of town had several hay wagons flipped over, and it tore the woodshed and chimney off a house. The Summerstown twister was rated as a likely F0, and its path was 30 meters wide and about 2 km long. Several trees were knocked down, and crops sustained some damage.
- July 22, An F0 tornado touched down near the town of Embro, Ontario. An Environment Canada employee witnessed the weak tornado in a field; It left no damage.
- August 11, An F0 tornado was confirmed near Midland, Ontario.
- September 8, Environment Canada confirmed that an F2 tornado touched down near the town of Odessa, Ontario. The path was estimated to be 6 km long, and it destroyed a large workshop, throwing the roof 1000 feet. A man was in the workshop at the time of the tornado, but escaped uninjured.
- September 22, An F0 tornado was confirmed in the small town of Wellington, Ontario, along the shoreline of Lake Ontario. Environment Canada said is was possible the tornado formed originally as a waterspout over the lake. Two properties received minor damage to lawn furniture and trees.
- April 27, Environment Canada confirmed that an F0 tornado touched down near the town of Fergus, Ontario. Multiple trees were blown over, siding was torn from buildings and possibly a large air conditioning unit was thrown from the roof of a retail store. The tornado spawned from a series of severe thunderstorms that swept across Southern Ontario. The towns of Kitchener and Waterloo, Ontario also reported some wind damage, but no tornado was confirmed for those areas.
- June 23, An F0 tornado briefly touched down near the Ottawa River and moved towards Aylmer, Quebec. No damage was reported.
- July 23, An F2 tornado touched down southeast of Wyoming, Ontario, and carved a path a half kilometer wide and 11 km long. It dissipated just south ofWatford, after blowing over eight steel transmission towers and also knocking down several hydro poles. Other damage reports included several trees snapped off and buildings moved from their foundations. One barn was completely destroyed.
- August 8, A weak F0 tornado occurred in the town of Plattsville, Ontario, about 18 km southwest of Kitchener. There was no damage reported.
- August 16, Four F1 tornadoes touched down in the heavily wooded areas of Northwestern Ontario. The first occurred near Dryden, Ontario, leaving a 24 km trail. The second touched down about 30 km northwest of Sioux Lookout, leaving a 12 km path. The third was confirmed in the Ear Falls-Wenesaga Lake area, about 100 km north of Dryden. It left a very small path of 1 km. The fourth F1 also touched down in Ear Falls, near Gerry Lake, leaving a 2 km path. All 4 tornadoes were given the F1 rating because of the amount of tree damage, and lack of structural damage.
- August 21, An F3 tornado hit Goderich, Ontario. In the late afternoon, a supercell storm formed and intensified over Lake Huron, spawning a waterspoutwhich came ashore and passed directly through the heart Goderich. At its widest over downtown, the tornado was estimated to be 1.5 km across, and its path was an estimated 20 km long. It caused devastating damage to the town’s port and historic downtown center, as well as to several blocks of residential homes. Approximately forty people were injured and one person was killed by the tornado, Ontario’s strongest since 1996.
- August 21, A very weak F1 tornado also occurred in the west end of Gananoque, Ontario, twisting trees and demolishing a shed. The track was close to 1.5 km before it dissipated.
- August 24, Two confirmed F1 tornadoes hit southwestern Ontario, after a line of severe storms swept through the province. The first touched down in the town of Little Corners, near Cambridge and left a 15 km path to Burlington, Ontario. The second touched down 6 km west of Nairn, Ontario and left a 10 km trail before it dissipated. A third F0 tornado also touched down in the southwestern part of Grey County, near Neustadt, Ontario. The track was around 3 km long and left damage mostly to trees.
- September 3, Environment Canada confirmed that an F0 tornado occurred just west of the town of Grimsby, Ontario. A large gazebo was destroyed and a number of large branches were knocked from trees. The path of damage was close to 2 km long, and the maximum witdh was around 300 metres. No injuries were reported.
- June 6, At 2:37–4:30 am a F1 tornado went from Harrow, through Kingsville and Leamington, Ontario, before dissipating near Point Pelee National Park. It partially uprooted trees which collided with power poles causing them to be damaged. Areas along the coast of Lake Erie were damaged. Ten houses and one mobile home were damaged, numerous cars were crushed by falling trees, and a large moving van was flipped onto its side by the tornado and adownburst-caused straight-line winds, but, there were 0 deaths and 1 indirect injury. Canadian stations (such as CBET and CHWI-TV) provided no warning, and the only notices that residents received of any serious weather were from Detroit stations WXYZ-TV, WJBK-TV, and WDIV-TV. This event was one of the most significant in Essex County’s history.
- June 6, An F1 touched down in eastern Ontario, near the villages of Dalkeith and Ste-Anne-de-Prescott close to the Quebec border.
- June 23, Two confirmed tornadoes touched down near the town of Midland, Ontario. The first tornado was rated an F2 and it touched down at approx. 6:30 pm near the Rowntree Beach area and ended near Waubaushene, a length of 25 kilometers. A second tornado rated an F1 spawned from the same thunderstorm, touched down around 7 pm just west of Washago. Its path lasted 12 kilometers. Tornado Warnings did go off 12 minutes before the first tornado struck, leaving some residents unprepared. In addition a Red Alert was even issued by the Emergency Management of Ontario in a huge swath of Central Ontario. Both twisters left 15 people injured, 8 seriously. There were no fatalities. That same evening after 9 pm, storms tracked through the Windsor–Essex County area, where a microburst caused damage near Colchester, Ontario destroying a party tent and part of a garage, with funnel clouds and a possible tornado reported in the rural areas of the Town of Essex, these tornadoes came on the same day just hours after Central Canada was rocked by an earthquake.
- June 27, An early-afternoon repeat of June 23, severe thunderstorms form in Southeast Michigan and track towards Windsor, spawning a minor tornado from Essex to roughly Staples, with a second forming near Cottam, in Central Essex County.
- July 23, An F0 tornado touched down in Amherstburg, Ontario around 7 pm. The path was around a kilometer long and 100 meters wide. Damage included multiple trees down, shingles ripped from roofs and some small buildings damaged, including one where the roof was torn off and blown a few yards away. There were no injuries reported. The same system also caused a downburst in Kingsville, Ontario. Another tornado may have touched down near Ruthven, Ontario, although nothing has been confirmed.
- April 25, At a surprisingly early date in the spring, an F0 tornado touched down in the west end of urbanized Ottawa, Ontario, at around 7:00 PM, after very early season heat 30C. Despite the weakness of the tornado, some roofs detached from houses, and trees and electricity poles broke, causing electrical shortages in an areas stretching from Britannia Bay in the west to Carlington Heights to the east. The damage path was up to 150m wide before lifting. In Gatineau, Quebec, severe damage was reported, including detached roofs from a school in Gatineau sector and a commercial building in Hull sector, as well as many trees and electricity poles falling down, which were more likely the results of a microburst or strong winds alone, as no tornado has been reported by witnesses. The same storm system also caused a minor F0 tornado in Windsor, ripping part of the roof off of the local CUPE union hall, damaging some windows on neighbouring homes, and blowing out the windows on an automobile in the union hall’s parking lot. The funnel cloud was first spotted over the western part of Windsor, near the University of Windsor, drifting southeast. Damage is reported to be low, with no injuries or deaths.
- June 25, Malahide Township, Ontario near London, Ontario a F2 tornado rips apart a house while a woman was blow-drying her hair. She escaped unharmed however. A second tornado strikes near Avon, Ontario 15 km west of Tillsonburg, Ontario destroying a house and many barns.
- July 9, A F2 tornado touches down in a resort on the shores of Lac Seul near Ear Falls in northwestern Ontario. It damages trees and a few structures, including a cabin, which was lifted into Lac Seul. Three men are killed. All three were visitors from Oklahoma on a fishing retreat. At least 5 others from Wisoncsin in adjacents camps were injured.
- August 4, An F2 tornado, the most intense Quebec tornado since the August 4 Aylmer tornado of 1994, touches down in Mont-Laurier and Aumond in western Quebec, just east of Ottawa. As well as many uprooted trees, more than 40 homes were severely damaged in Mont-Laurier, and a home in Aumond was torn off its foundation. A cameraman for CFCF-TV and a helicopter pilot were killed a day later while gathering aerial footage of the damage.
- August 20, Southern Ontario Tornado Outbreak of 2009 Eighteen confirmed tornadoes touched down in Ontario, the largest tornado outbreak in Canadian history.
- Durham to Markdale, F2, 36 km path, one death and many serious injuries when conservation area gate house was picked up and thrown on a tent filled with people, major structural damage to buildings
- Clarksburg, F2, clear video shows this tornado coming down from the Blue Mountains through a golf resort and then moving toward the open waters ofGeorgian Bay.
- Vaughan F2, 3.5 kilometer path through the Woodbridge neighborhood
- Vaughan F2, 2.7 kilometer path through the Maple neighborhood. This and the Woodbridge neighborhood tornado prompted a State of Emergency in Vaughan, with hundreds of homes damaged, several requiring demolition
- Newmarket, F1
- Milton, F1
- Moonstone, F0
- Ril Lake, F1
- Dollars Lake, F0
- Gravenhurst, F1, 10 km path
- New Lowel to Edenvale, F1, 12.6 kilometer path
- Haliburton, F1
- Haliburton Forest, F1
- Redstone Lake, F0
- Arnstein probable “‘F1″‘ tornado, which began as a waterspout in Lake Nipissing before becoming a tornado on land.
- Carlow/Mayo, “‘F1″‘ tornado
- Rice Lake, F1
- Orono, F0
- June 6, An F1 tornado was detected in Echo Bay in Algoma District at roughly 10:00 PM local time. A roof was torn off a warehouse and damage to a tractor dealership was caused.
- June 8, A possible tornado was detected by doppler radar near Highway 402 in the Strathroy area in the late afternoon as strong storms moved throughSoutheastern Michigan and into Southwestern Ontario. Three tornadoes in Ontario. F1 tornado was detected in Ruthven, near Kingsville and Leamington. Other tornadoes touched down near Lucan, Ontario and Brantford.
- June 22, A small rope-type tornado touches down in Bryanston, Ontario near St. Marys, Ontario. Close up video of the tornado, taken less than a mile away, was captured just east of Bryanston, Ontario. Another video captured the tornado as seen from a London apartment, looking north. The twister damaged a large pig barn, and uprooted several trees. Video of the path can be seen here.
- July 26, A F1 (possibly an F2) tornado touched down near the town of Coboconk, Ontario at around 2:45pm. Severe weather warnings were in effect at the time of the tornado.
- May 15, Mitchell, Ontario Tornado. An F1 tornado struck the Mitchell, Ontario area around 60 km northeast of London, Ontario, causing minor damage. It was the third significant tornado to hit the Mitchell area in a three-year span. The same storm system that caused this tornado also produced a couple other tornadoes (an F0 and an F1) in The Thumb area of Michigan, northern Indiana, and Ohio before crossing Lake Huron into Ontario.
- July 8, An F1 tornado was confirmed near Mildmay, Ontario. The tornado destroyed a large implementation shed and debris was reported 1.5 km away. Another tornado was sighted in the area but was unconfirmed.
- July 17, an F1 tornado struck Newmarket, Ontario at night, packing winds of 120 to 170 kilometres an hour, cut a swath of damage 10 km long and 100 metres wide in the Woodbine Avenue/Davis Drive area around 10:15 p.m. At about the same time, an F0, with winds up to 115 km/h, was wreaking havoc in a small section of the Stonehaven subdivision, off Leslie Street south of Mulock Drive.
- July 25, An F0 tornado destroyed a barn in Hebertville, Lac Saint-Jean, Quebec. The same storm produced hail that reached 5–6 cm (2 in) in diameter and caused 2 million Canadian dollars damage in the agricultural community.
- August 2, a number of homes and cottages damaged or completely destroyed by a tornado in Combemere, Ontario located in the Upper Ottawa Valley. The same storm system spawned an outbreak of fourteen confirmed tornadoes mostly concentrated north of Peterborough, Ontario in the Haliburton,Kawartha and Madawaska areas, which damaged cottages in the area, some severely. It was the most tornadoes confirmed in Ontario in a single 24-hour span day since 1985 and matched the annual provincial average. The strongest were two F2s, one that struck an isolated area near Bancroft, Ontario and the other that made a direct hit on the town of Combermere, Ontario.
- August 19, Southern Ontario Tornado Outbreak of 2005. These associated storm caused extensive widespread damage in a path from Stratford, Ontario(20 km west of Kitchener), to Peterborough, Ontario, and along Georgian Bay near Collingwood. A storm cell just to the north of Fergus, Ontario spawned twoF2 strength tornadoes that were particularly damaging, tearing apart trees, farms and overturning automobiles driving on a highway. The first tornado tracked through Milverton to Conestogo Lake (west of Elmira). The second moved from Salem to Lake Bellwood (north of Guelph). The same storm cell later triggered a tornado warning in Toronto and caused extensive flooding with over 140mm (7″) of rain in some northern sections of the city, washing out many roads as well as damaging infrastructure such as storm sewers and electrical systems. An unusual tornado possibly touched down within the Toronto, Ontario city limits, although never officially confirmed by Environment Canada. In its wake, the storm left a trail of damage that, according to the Insurance Bureau of Canada, represented the highest insured loss in the province’s history, exceeding $500 million. That’s more than two and a half times Ontario’s losses during the infamous ice storm of 1998 and the second largest loss event in Canadian history.
- November 9, in Hamilton, Ontario, a late-season tornado tears off part of the roof of a school and damages businesses and homes in the area. SeeHamilton, Ontario Tornado of 2005.
- May 22, May 2004 Tornado Outbreak Sequence, one strong F2 struck near Mitchell, Ontario at 6pm and an F3 in nearby Gad’s Hill, causing extensive property and infrastructure damage.
- June 9, An F1 struck near Escott, Ontario destroying a barn and a two-car garage. One man was killed when a tree fell on the porch he was standing on.
- August 10, Two F1 tornadoes occurred near the Ottawa region. The first near Burnstown, 10 km southeast of Renfrew. It ripped the roof off a barn, snapped several trees and destroyed a shed. The second tornado happened near Thurso, Quebec.
- May 31, North Bay, Ontario was struck by two weak tornadoes.
- June 23, A weak tornado touched down in Ottawa between Kanata and Barrhaven.
- July 28, Severe thunderstorms over northern Ontario produced a tornado over Halfway Lake Provincial Park (70 km north of Sudbury, Ontario) where 800 people were camping at the time, fallen trees injure 4 campers. Up to 150 mm rain falls in just 3 hours at Stratford and Tavistock in Ontario.
- July 4, Quebec and Southeastern Ontario had some severe weather. There was heavy rain, strong winds and 2 cm hail. Tornadoes touched down in Ayr,Argyle, Campbellville and Fenelon Falls (all in Ontario), the strongest of them rated an F2. At least 5 tornadoes are confirmed in southern Ontario on 4th with other unconfirmed reports.
- July 17 Guelph, Ontario Tornado. An F2 tornado struck the city of Guelph, Ontario causing around $2M damage and destroyed roofs, trees and fences. The same storm then produced a second tornado in Waterdown, Ontario.
- August 4, An F2 tornado with a twisting but narrow path causes damage in the rural north end of Burlington, Ontario, relocating a motorhome 2 kilometers from where it was parked, the tornado track was over 10 km long.
- June 2 Norwich, Ontario . During a wider severe weather outbreak (Derecho thunderstorm) that struck Southern Ontario in the mid-afternoon, an F1 tornado descended near Holbrook around 3:50PM and traveled southeastward to Norwich, damaging many buildings, including a church. There were also tornado reports in Elmvale and Dunnville, and several reports of funnel clouds, hail, and high winds.
- July 2, Southeast Michigan Tornado Outbreak F1, F2, F3 Windsor, Ontario and surrounding areas. See article for more in-depth information.
- April 20, Southern Ontario Tornadoes of 1996, Grey, Wellington and Dufferin counties. Two F3 class tornadoes touched down in Grey County (Williamsford), Wellington County and Dufferin County. Significant property damage occurred; nine people were injured by the two tornadoes.
- May 20, A strong thunderstorm damages one of the four screens of a drive-in theatre at Thorold in the Niagara Region. Coincidentally, this drive-in was planning to show the movie Twister that evening. Eyewitnesses report seeing a small funnel cloud, but the physical evidence is inconclusive. Distorted and exaggerated media reports of this event abound; most claimed that the storm blew down the screen while Twister was being shown on it. The storm actually took place before sundown. However, a small tornado did touchdown in Stoney Creek that same evening.
- July 15, A large progressive derecho thunderstorm produced severe winds over an expansive area of the central Great Lakes and New England overnight also contained at least six tornadoes that hit central Ontario, most centred or to the north of the Kawartha lakes. The strongest is an F2 tornado that destroys a marina at Bridgenorth, Ontario and overturns a houseboat on Chemong Lake, trapping 20 occupants for a few hours until they are rescued, just north ofPeterborough, Ontario. One person is killed in Bridgenorth.
- August 14, A tornado touches down near Barrie, Ontario.
- August 4, An F3 tornado in Aylmer, Quebec across the river from Ottawa, Ontario, injures 15 people. The tornado path was 8 km long and caused major damage to a downtown residential subdivision including homes destroyed. A second tornado had previously touched down just across the Ottawa River inCarp. In Quebec, other tornadoes touched down near Laurel and Rawdon.
- March 27, An early season tornado strikes Sarnia, Ontario, causing over $25 million in damage.
- August 28, Southern Ontario was hit by 3 tornadoes, in what is dubbed the Lower Great Lakes Tornado Outbreak of 1990. The strongest tornado was an F3, which hit the Port Stanley area. An F2 also struck Komoka, Ontario, near London, and an F1 tornado touched down near the small town of Kendal, Ontario, just north of Newtonville. Several buildings sustained minor damage, and some crops were destroyed. Luckily only six minor injuries were reported.
- June 16, Severe storms produced an F3 tornado that traveled from Brady Lake to Maynooth, Ontario. Two other tornadoes were also reported.
- June 16, An F3 tornado was confirmed near Lac Gareau, Quebec. It severely damaged summer chalets and overturned a truck. Two other tornadoes were reported further east. This was from the same weather system that affected Ontario earlier in the day.
- May 31, An F4 tornado hits Barrie, Ontario, becoming known as The “Barrie” Tornado Outbreak of 1985. It was part of the bigger 1985 United States – Canadian tornado outbreak. There were 13 confirmed tornado touchdowns in Ontario. 12 people were killed, 8 in Barrie alone, and hundreds injured. The tornado detroyed more than 300 buildings, and damaged another 100, leaving 800 homeless. The cost was estimated at over $100 million. Another four people were killed by a tornado that struck close to Grand Valley, Orangeville and Tottenham. That tornado had a touchdown path length of over 100 km (62 mi). See article for in-depth information. Another confirmed F0 tornado hit the Leamington, Ontario area, as part outbreak.
- July 7, An F1 tornado hit the Meadowvale area of Mississauga, Ontario injuring 10 and causing $400,000 damage.
- September 7, A tornado touched down near Big Rideau Lake, Ontario. The storm killed 1 person when it overturned a houseboat cruising on the lake.
- October 4, A weak tornado touched down in Wheatley, Ontario.
- June 18, A tornado struck Eastern Ontario near the town of Westport. It severely damaged a small group of buildings.
- August 14, A tornado hit the north part of Toronto, Ontario causing millions in damage.
- September 2, 6 confirmed tornadoes touched down in Ontario, known as the Southwest Ontario Tornado Outbreak of 1984. Most were near the city ofLondon. 30 people were injured.
- May 2, Tornadoes touched down in Lambton County, hitting the communities of Walpole Island and Reece’s Corners, Ontario. Reece’s Corners was hardest hit with 14 homes and businesses seriously damaged. 13 people were injured.
- August 7, 3 tornadoes strike near the Woodstock area of Ontario, causing more that 100 million dollars in damage. The biggest were two F4 tornadoes; one starting in Woodstock and traveling southeast for 57 kilometers, the other starting in the south of Stratford, Ontario, tearing a path southeast for 31 kilometers. Interestingly, an F0 satellite tornado accompanied the Woodstock tornado for up to 21 kilometers. The storms killed 2 and injured more that 150. 480 houses were left uninhabitable. For more information, please see the 1979 Woodstock, Ontario tornado page.
- April 3, Windsor, Ontario is hit with an F3 tornado, part of the 1974 Super Outbreak. 9 people were killed, with over 20 injured and an estimated $500,000 in damage. It is listed as the sixth deadliest tornado in Canadian history.
- July 13, A tornado touched down in Brighton, Ontario around 7:30 in the evening. The twister only lasted 32 seconds, but destroyed City Hall and toppled most maple trees along Main Street. The Presbyterian Church also lost its steeple. Luckily only one person was injured.
- August 27, Algonquin Park is hit with another tornado near Manitou Lake, flattening an 11 km long path of forest.
- July 22, A tornado near Algonquin Park, Ontario left a 25 km path destroying a portage trail and wide swaths of Red Pine forest and other trees south of Lake Lavieille.
- August 20, An early morning F3 tornado touches down near Sudbury, Ontario, causing extensive damage in the town, as well as the communities of Lively,Field and Copper Cliff. Lively was the hardest hit, with over 300 homes damaged. The communities were given little warning of bad weather approaching, as the Sudbury airport did not have radar that detected tornadic activity. 6 people were killed and over 200 were injured. The damage was estimated at 17 million dollars, and it’s listed as the eighth deadliest tornado in Canadian history.
- April 19, A tornado hit Huron County, Ontario, flattening barns & homes, and snapping multiple trees and utility poles. No one was injured in the storm, and the damage was estimated at over 1 million dollars.
- May 21, An F4 tornado hit Sarnia, Ontario. It left seven people dead, over 40 injured, and 500 homeless. The path was estimated to be over 150 kilometers long, although it could have been made by up to 4 tornadoes that day.
- June 17, An F4 tornado strikes the towns of Windsor, Ontario and Tecumseh, Ontario. There were 17 casualties, and it is the 3rd deadliest tornado in Canadian history.
- June 24, An F3 tornado hits Fort Frances, Ontario. The storm started in International Falls, Minnesota and dissipated near Rainy River, Ontario.
- June 24, A tornado touches down near Hornby, Ontario, in present-day Halton Hills. It travels eastward almost 20 km before dissipating near Cooksville, Ontario, close to the centre of present-day Mississauga.
- September 26, A tornado hits Merritton, Ontario, killing 5 and injuring dozens of others. It left a 72 kilometer path of destruction from St. Catharines, Ontario to Tonawanda, New York.
- June 29, A tornado touched down in London, Ontario, destroying barns and orchards.
- June 6, A tornado affected an area between Cornwall, Ontario and Montreal, Quebec, killing 3 people and destroying 500 farms, barns and outbuildings.
- August 16, A tornado crossed from Lancaster Township, Ontario into Saint-Zotique, Quebec, and then onto Salaberry-de-Valleyfield, Quebec. It caused extensive property damage, killing 9 people and injuring 16. It is considered the 5th deadliest tornado to ever hit Canada.
- June 7, Houses and orchards in Parkhill, Ontario and St. Thomas, Ontario were damaged when a tornado touched down and hail up to 10 cm in diameter fell.
- May 15, A suspected F4 tornado hits Elora, Ontario. It was half a kilometer wide and destroyed barns, fences and stables. It also damaged a church and cemetery in Goldstone, Ontario.
- June 10, A 200 m wide tornado in Listowel, Ontario lifts a man up into the air. He grabs on to a bridge to save himself.
- May 19, Homes, fences and trees were demolished by a 500 m wide tornado near Aurora, Ontario. Hailstones up to 8 cm in diameter also fell.
- April 18, An area between Collingwood and Niagara-on-the-Lake, Ontario, were affected by tornadoes, one of which lifted a saloon up into the air.
- June 2, The early settlement of Guelph, Ontario is destroyed by a strong tornado. Re-settlement does not begin for a few years afterwards.
- August 7, First known and confirmed tornado death in Canada happened in Galt, Ontario, which is now Cambridge.
- June 30, The first recorded tornado in Canadian history affected the Niagara Peninsula between Fonthill and Port Robinson, Ontario. It leveled houses and uprooted many trees.
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