12:45 p.m. CST (UTC−06:00)
Reynolds County,Missouri
In the midday and afternoon hours of March 18,1925,the deadliest tornado in United States history and second-deadliest worldwide moved through Eastern Missouri,Southern Illinois and Southern Indiana,killing 695 people and injuring 2,027 more in what became known as the Great Tri-State tornado. The tornado touched down as part of a larger severe weather outbreak that hit the United States on the same day,and produced catastrophic damage across numerous villages and towns across all three states. Despite not being officially rated,it is widely accepted to have been equivalent to an F5 on the Fujita scale.
The tornado touched down in Shannon County,Missouri,moving to the northeast. The tornado immediately began to produce heavy damage to structures before directly impacting Annapolis,destroying ninety percent of the town and killing two people. The tornado then moved through Bollinger County,where it would hit two schools and injure several children who were taking shelter. Deep ground scouring was observed as the tornado moved past Sedgewickville,and debris from the town was found almost 50 mi (80 km) away. It would hit several other small communities,including Brazeau and Frohna,before crossing state lines into Southern Illinois and directly impacting Gorham. Over half of the town's population was killed,and the town was devastated as the tornado moved by. To the northeast,it would hit the northern portions of Murphysboro,where over one hundred residents would die as the tornado barelled through the town at an estimated forward speed of 62 mph (100 km/h). [note 1]
Further east,the tornado crossed into Franklin County,narrowly missing the towns of Royalton and Zeigler,devastating rural areas before heading towards the large mining town of West Frankfort. The tornado struck the northwest side of town,where in a manner similar to what was seen at Murphysboro,a number of densely populated neighborhoods,businesses and mining operations fell victim to the tornado. At the Orient Mine,a large multi-ton coal tipple was blown over and rolled by the tornado. The tornado proceeded to devastate additional rural areas across Hamilton and White counties,between the two counties claiming 45 lives and injuring 140,20 of whom later died,where it dissipated over three hours after touching down.
The tornado killed at least twenty farm owners in southeastern Illinois and southwestern Indiana,more than the combined total of the next four deadliest tornadoes in the history of the United States. The tornado killed a combined total of 695 people,the majority of which occurred in Illinois.
The extratropical cyclone that set the synoptic stage for the outbreak was centered over northwestern Montana at 7:00 a.m. CST (13:00 UTC) on March 17. Meanwhile,a diffuse area of surface low pressure was centered near Denver,Colorado,in association with a lee trough. Occluded fronts extended from Hudson Bay southwestward into the northern Plains states and into the lee trough. The synoptic cyclone moved south-southeastward across the mountain states to eastern Colorado. A warm front stretched along the Gulf Coast,separating warm,moist air from cool,showery weather with areas of fog that extended from Texas to the Carolinas. A well-mixed early-season continental tropical (cT) air mass existed over West Texas and northern New Mexico. To the east of this hot,dry air,buoyant maritime tropical (mT) air was advecting from the Gulf of Mexico. Simultaneously,a mid- to upper-level shortwave trough likely approached the northwest coast of the U.S. and moved rapidly through the persistent ridge then digging southeastward across the Great Basin and central Rocky Mountains and emerging in the Plains over Colorado. This initiated a colorado low cyclogenesis. [1]
At 7:00 a.m. CST on March 18,the surface low-pressure area,at approximately 1,003 hPa (29.6 inHg),moved to far northeastern Oklahoma while the warm front shot north into the circulation where the front then extended eastward. A maritime Polar (mP) cold front draped southwestward across eastern Texas with a dry line forming directly to the south of the low. The open shortwave,likely somewhat negatively tilted,was continuing to approach from the northwest and an apparent outflow boundary moved just to the south of the warm front over northeastern Arkansas and northwestern Tennessee. Several weak pressure troughs were traversing the cool sector over the north-central U.S.. Surface temperatures in the warm sector near the dry line and warm front ranged from 60–70 °F (16–21 °C),and the dew point was 55–65 °F (13–18 °C),with higher values farther south and increasing over time as the deepening low-pressure area continued to pull up air from the Gulf of Mexico. This resulted in unstable air and lower cloud bases,or low LCL heights,which is favorable to tornadogenesis. From southeastern Kansas to Kentucky and Indiana,early morning showers and thunderstorms north of the low and warm front cooled and stabilized that air,retarding northward advancement of the front,and led to a sharp contrast in temperature from north to south. Such baroclinic zones are also associated with tornadic storms. Ahead of the surface dry line,which are uncommon as far east as the Mississippi River,an apparent "dry punch" of air aloft served to further increase instability. Concurrently,a capping inversion likely suppressed storms throughout the warm sector,leaving the Tri-State supercell undisturbed by nearby convection. [1] By 12:00 p.m. CST (18:00 UTC),the deepening surface low was centered over south-central Missouri,the shortwave axis was moving easterly and oriented over eastern Oklahoma,and the dry line was rapidly advancing eastward directly south of the low as the warm front,situated due east of the low,slowly shifted northward. Morning clouds cleared by midday across much of the Tri-State tornado's eventual path. A pronounced pressure trough extended northeast of the low and signaled its future track as a prefrontal trough formed southeast of the low ahead of the dry line. A bulge in the dry line may also have been forming slightly south of the low,and southerly to southeasterly surface winds were backing and increasing with time throughout the warm sector. The Tri-State supercell formed in a highly favorable area just ahead of the triple point where the cold front,warm front,and dry line met. The supercell initiated very near the surface low and moved east-northeastward,faster than the low,such that the storm gradually deviated east of the low's track. [1]
By 2:00 p.m. CST (20:00 UTC),the low was centered slightly south-southwest of St. Louis,Missouri,as the Tri-State supercell neared the Mississippi River. Other storms in the warm sector,removed from the Tri-State supercell,were initiating around 3:00 p.m. CST (21:00 UTC). Around 4:00 p.m. CST (22:00 UTC),the low's central pressure lowered to around 998 hPa (29.5 inHg),centered over south-central Illinois,as the supercell was moving into Indiana. This pressure is not particularly low compared to many other outbreak setups,but the pressure gradient was strong,which induced strong gradient winds and significant advection in the warm sector. A very strong low level jet was also in place just above the surface as winds veered with height,resulting in low-level curvature and long hodographs. Strong wind shear thus existed,with pronounced directional shear likely in the vicinity of the warm front,with winds at the 700 hPa height level west-southwesterly around 70 mph (110 km/h) and winds at the 500 hPa level about 90–110 mph (140–180 km/h). Theoretical hodographs returned estimated storm relative environmental helicity (SREH) values of 340 m2 s−2 in the vicinity of the Tri-State supercell track. Strong thunderstorms were now scattered throughout the warm sector and a line of severe thunderstorms was occurring near the dry line. The Tri-State supercell appeared to still be discrete and isolated,with a severe storm north of Cairo,Illinois,placed well to its south. [1]
The tornado was first sighted as a highly visible and relatively small condensation funnel in the rugged forested hills of Moore Township,Shannon County,Missouri,at about 12:40 p.m. CST. However,this was likely a separate member of the tornado family,and the main member likely began in Reynolds County,west-northwest of Ellington,around five minutes later. The first fatality occurred around 1:01 p.m. CST (19:01 UTC),when a farmer was caught off-guard north-northwest of Ellington. [2] [3]
The tornado sped to the northeast,moving into Iron County and hitting the mining town of Annapolis and the small mining village of Leadanna. Within a matter of minutes,two people were killed and an estimated 90% of the town was leveled. [4] It then crossed into the sparsely populated areas of Madison County south of Fredericktown,where near Cherokee Pass the tornado steadily began to grow larger. [5]
In Bollinger County,32 children were injured when two schools were damaged. Multiple homes and farms were completely destroyed near Lixville,where a farmer and three children were killed,and a third child died from her injuries one week after the storm. Deep ground scouring was observed near the town of Sedgewickville as well. The tornado carried sheets of iron as far as 50 mi (80 km) away. [6]
Crossing into Perry County,the tornado reportedly developed a double funnel as it struck the town of Biehle,destroying many homes in and around the town and killing a farmer. At Brazeau,another farmer was gravely injured and died four days later. Numerous other homes and farms were completely leveled near Frohna as well,where one woman was killed and another died from her injuries ten days later. [7] [8] Altogether,at least 12 people (possibly more) died and another 200 were injured in Missouri. [9]
The tornado then crossed the Mississippi River into southern Illinois,debarking trees and deeply scouring the ground in rural areas before hitting the riverside town of Gorham at 2:30 p.m. CST (20:30 UTC),essentially obliterating the entire town. 60 of the 80 homes,all the store fronts,the train depot,and 2 out of the 3 levels of the school were destroyed with the remaining 20 houses being damaged. [10] Railroad tracks were also reportedly ripped from the ground. More than half the town's population was injured or killed;30 were killed in the immediate storm and 170 were injured,six of whom later died. [11] [12]
Continuing to the northeast at an average speed of 62 mph (100 km/h) (and up to 73 mph (117 km/h)),the tornado cut a swath almost 1 mi (1.6 km) wide through the city of Murphysboro,a thriving coal shipping center and railroad town of 10,000. The tornado leveled all but the extreme southeastern side of town,where many densely populated working-class neighborhoods saw some of the storm's most horrific effects. Entire rows of homes were leveled and swept away in some areas. [13] Many other structures were also damaged or destroyed throughout the town,including the M&O railroad shop,where 35 people were killed,mostly in fires after the tornado. [14] Schools in the area were devastated as well,with 17 students killed at the Longfellow School and nine others killed at the Logan School. [4] After the tornado passed,large fires ignited and swept through the rubble,burning many of the trapped survivors alive. With the water mains destroyed,dynamite was used to try to stop the fires,but only caused more destruction. [15] In all,188 people died in the immediate storm at Murphysboro,including at least 20 who were never identified. The official number of injured was a 623,while some other sources claim it could have been higher. Of those injured,46 more later died,bringing the storm's death toll at Murphysboro to 234,to date being the highest exacted by a tornado of any single city in the United States. [16] The tornado then struck the farming town of De Soto,which on a scale paralleling Gorham was virtually obliterated. In the immediate storm,56 were killed and another 105 were injured,5 of whom later died,as many homes were swept away. [17] Thirty-three of the deaths were students that were killed in the partial collapse of the De Soto School,the worst tornadic death toll at a single school in U.S. history. [18] Also killed at De Soto was Jackson County Deputy Sheriff George Boland. While on patrol when the storm struck,the tornado lifted him from the ground and he disappeared into the funnel. His body was never found. [19] [20]
After exiting De Soto,the tornado clipped the northwest corner of Williamson County,narrowly missing the town of Hurst and striking the small village of Bush. Several homes were leveled,and pieces of wood were speared into the town's water tower. Heavy railroad axles were reportedly lifted and scattered across the railyard. [21] The tornado killed 10 people in Bush and the surrounding area,and injured another 37,four of whom later died. [22]
Further east,the tornado crossed into Franklin County,narrowly missing the towns of Royalton and Zeigler,devastating rural areas and killing 25 people—20 of whom perished immediately and another five in the days to come—before heading towards the large mining town of West Frankfort. The tornado struck the northwest side of town,where in a manner similar to what was seen at Murphysboro,a number of densely populated neighborhoods,businesses and mining operations fell victim to the tornado. Extreme damage continued east of town,as a railroad trestle was torn from its supports,and 300 ft (91 m) of railroad track was ripped from the ground and blown away. The immediate storm claimed 81 lives at West Frankfort,while injuring a further 410,21 of whom later died,bringing the death toll for the town to 102. [23]
Several small mining villages in the area were obliterated,resulting in numerous fatalities. [24] At Caldwell,a mining village northeast of West Frankfort,24 people died in the storm,later to be joined by two more of the injured. The heaviest loss to befall a single family was exacted on that of Caldwell storekeeper Isaac 'Ike' Karnes,which lost 11 members. Karnes' wife,a married daughter and her husband,a daughter-in-law and seven grandchildren,ages ranging from newborn to seven years,died in the tornado. [25]
Further to the northeast,the tornado then completely destroyed the small town of Parrish,killing 28 people and injuring 60,five of whom later died,bringing the death toll at Parrish to 33. [26] The destruction of the town was so complete that many residents and businesses moved on,and the town was never rebuilt. The storm continued to devastate more rural areas in the eastern side of the county,claiming another six lives. In all,the storm claimed 192 lives in Franklin County:159 in the immediate impact and another 33 among the injured in the following weeks. [6]
The tornado proceeded to devastate additional rural areas across Hamilton and White counties,between the two counties claiming 45 lives and injuring 140,20 of whom later died. [27] As the tornado charged across Hamilton County south of McLeansboro,the tornado reached its greatest width at 1.5 miles (2.4 km). Dozens of farms,homes,schools and churches were swept away,28 people were killed,and nine more were mortally wounded. In White County the tornado passed just two miles north of Carmi,missing the towns of Enfield and Crossville by just a few hundred yards. Another 18 were killed and 11 of those later died as a result of their injuries. [6]
Crossing the Wabash River just north of New Harmony,the tornado then entered Indiana. Grazing the northernmost edge of Posey County,the tornado struck and completely demolished the town of Griffin,where not a single structure was left untouched by the storm,and many were completely swept away;41 people were killed at Griffin and in the surrounding areas,another 202 were injured,with five later dying,bringing the death toll at Griffin to 46. [6]
After exiting Griffin,the tornado made a slight turn towards the northeast as it crossed into Gibson County,devastating rural areas and clipping the northwest corner of Owensville,resulting in nine fatalities. The tornado then roared into the large factory town of Princeton,destroying much of the southern side of the town,killing 38 people and injuring 152,six of whom later died. [28] Large sections of neighborhoods in Princeton were leveled,and a Heinz factory was badly damaged. [29] The tornado traveled more than 10 mi (16 km) to the northeast,crossing into Pike County before finally dissipating at about 4:30 p.m. CST,near Oatsville. In Indiana,at least 95 (and probably more) perished. [30]
In the immediate aftermath,hospitals from St. Louis to Evansville were inundated with the injured and dying,as the storm injured more than 2,000 people,105 of whom later died from their injuries. In Missouri,relief trains carried the most seriously injured north to St. Louis,while the remainder were sent to hospitals at Perryville and Cape Girardeau. At Gorham,where half the town's population was injured,the Missouri Pacific Railroad shuttled most of the injured north to East St. Louis,and the remainder south to Cairo. [31]
The town hospital in Murphysboro,where several hundred were injured,was ill-equipped to deal with the casualties,prompting hundreds to be shipped out to other towns by train once the lines were cleared. The most seriously injured were sent by train to Barnes Hospital in St. Louis. [32] For most of the injured,dying and destitute from Murphysboro,the college town of Carbondale,some seven miles to the southeast,provided a safe haven. However,at De Soto,chaos ensued as the affected were scattered in three different directions;six miles south to Carbondale,five miles east to Hurst,or for many,fourteen miles north to Du Quoin. [33] For the tornado victims at Parrish,relief came from Thompsonville three miles to the southeast,where a team of railroad workers with the Illinois Central Railroad led by a heroic physician from Iowa,pulled a train directly into the demolished village. The train was loaded beyond capacity with the dead,injured and dying before proceeding to the northwest to the hospital at Benton. [34]
The storm claimed its final victim on January 3,1926,when Gervais Burgess,a 46-year-old coal miner from West Frankfort,died from injuries sustained in the tornado. [35] In addition to the dead and injured,thousands were left without shelter or food. Fires erupted,growing to conflagrations in some places,exacerbating the damage. [36] Looting and theft,notably of the property of the dead,was reported. Recovery was generally slow,with the event leaving a lasting blow to the region. [37]
In the end,a total of 695 were confirmed dead –12 in Missouri,95 in Indiana and 588 in Illinois. Three states,14 counties,and more than 19 communities,four of which were effectively effaced (several of these and other rural areas never recovered),were in the path of the tornado,which had lasted a record duration of three and a half hours. Approximately 15,000 homes were destroyed by the Tri-State tornado. [38] Total damage was estimated at $16.5 million in 1925 dollars;adjusted for increases in population/wealth and inflation,the toll is approximately $1.4 billion (1997 USD),surpassed only by two extremely destructive tornadoes,each of which was posthumously rated F4,both in the City of St. Louis,in 1896 and 1927. [39]
Nine schools across three states were destroyed,in which 69 students were killed. More schools were destroyed and more students killed (as well as the single school record of 33 deaths in De Soto,Illinois) than in any other tornadic event in U.S. history. [40] Deaths occurred at many rural schools. Counting those returning home from schools and those that died in schools,the toll was 72 students. [41] Approximately one-third of the tornado's victims were children. The rural death toll of 65 in Hamilton and White counties in southeastern Illinois is unprecedented. The tornado killed at least 20 farm owners in southeastern Illinois and southwestern Indiana,more than the combined total of the next four deadliest tornadoes in the history of the United States. [42]
According to the National Weather Service,no photographs or film reels of the Tri-State tornado were taken or are known to exist. [43] The tornado was frequently described by witnesses as an "amorphous rolling fog" or "boiling clouds on the ground", [44] and fooled normally weather-wise farm owners (in addition to people in general) who did not sense the danger until the storm was upon them. The condensation funnel was also reportedly sometimes wrapped in copious dust and debris,which likely obscured it and made it less recognizable. The parent supercell apparently transitioned to a high-precipitation (HP) variety by the time it struck West Frankfort,meaning that the tornado was not readily visible as it approached,as it was often shrouded in heavy rain and hail. The very strong tornado –modern meteorologists estimate that its wind speeds topped 300 miles per hour (480 km/h) in some locations –at times exhibited an unusual appearance due partially to its size (at one point in Missouri,it was a full mile and a half wide) and the probable low cloud base of its parent thunderstorm. [45] [46] However,WDRB meteorologist Jeremy Kappell claimed in 2015 to have “one of the few photographs that have been preserved of what is believed to have been of The Great Tri-State Tornado”. [47] [48] Although,this photograph is of the 1979 Wichita Falls F4 tornado and not the 1925 Tri-State tornado.
The tornado was often accompanied by extreme downburst winds throughout the entirety of its course;the accompanying downburst periodically increased the width of the damage path from the overall average of 0.75 mi (1.21 km),varying from 1 to 3 mi (1.6 to 4.8 km) wide at times. [40]
There has long been uncertainty as to whether the originally recognized reports of a 219-mile (352 km) path over 3.5 hours represent a single continuous tornado or multiple independently tracking tornadoes belonging to a tornado family. Because of the scarcity of verifiable meteorological data from the time of the event and the apparent absence of any record of a tornado having approached this path length and duration in the years since,doubts have been raised about the plausibility of the conclusion that a single tornado was responsible for them. To date no definitive conclusion has been reached and a complete understanding of what occurred remains unachieved. [40]
Modern meteorological theory regarding tornado and supercell morphology and dynamics suggests that a single tornado lasting for such a duration is highly improbable. [1] Several other historical accounts of very long track (VLT) tornadoes have subsequently been determined to be the product of tornado families [49] (notably the Charleston-Mattoon,Illinois tornado family of May 1917 and the Woodward,Oklahoma tornado family of April 1947). In more recent years,some VLT tornadoes and supercells have indeed occurred,with 12 tornadoes exceeding 100-mile (160 km) path lengths from 1980 to 2012,and 60 since 1950. [3] Yet the high-end estimates of the Tri-State tornado path length are still far longer than the nearest verified VLT tornado. No single factor accounts for the exceptional path length and duration,though the fast forward motion of the tornado,which averaged 59 mph (95 km/h),may have translated to more distance covered. [1]
In 2001,tornado expert Tom Grazulis wrote that the first 60 miles (97 km) of the track was probably the result of two or more tornadoes,and that a 157-mile (253 km) segment of the overall path length was seemingly continuous. [50] Exhaustive research published in 2013 found no definitive resolution,but did locate additional tornado sightings and damage 15 mi (24 km) west of the previously known beginning of the tornado and 1 mi (1.6 km) east of the previously known ending,extending the total path length by 16 miles (26 km) to 235 mi (378 km) long. The scientists concluded it is likely that at least some of the track,both at the beginning and ending,was indeed caused by separate tornadoes. They also located a 20 mi (32 km) path (apparently created within a period of about 20 minutes) from a large tornado which was likely spawned from the same supercell and was about 65 mi (105 km) east-northeast of the aforementioned path ending. This brings the known length of the Tri-State tornado family to around 320 mi (510 km) over nearly 5.5 hours. [3]
The 2013 study concluded with moderate confidence that the 174 mi (280 km) segment from central Madison County,Missouri to Pike County,Indiana,was the result of one continuous tornado,and high confidence that the 151 mi (243 km) segment from central Bollinger County,Missouri to western Pike County,Indiana,was the result of a single continuous tornado. The first value would hold the record for the longest recorded tornado track,but the latter would be second behind the 165-mile (266 km) track of the Western Kentucky tornado,another extremely long-tracked violent tornado which occurred on December 10,2021. However,the 151-to-174-mile-long (243 to 280 km) figures for the path are considered most likely to be continuous solely because observations were sufficiently dense,whereas the 219-mile-long (352 km) figure from westernmost Reynolds County,Missouri,to westernmost Pike County,Indiana,contained several gaps in which eyewitnesses and reports of damage were lacking,owing primarily to sparse patterns of human settlement,but this may well have been continuous because the alignment of reports showed a consistent heading,suggestive of a single tornado rather than a family. [3]
On March 18, 1925, one of the deadliest tornado outbreaks in recorded history generated at least 12 significant tornadoes and spanned a large portion of the midwestern and southern United States. In all, at least 751 men, women and children were killed and more than 2,298 were injured, making the outbreak the deadliest tornado outbreak in U.S. history. The outbreak generated several destructive tornadoes in Missouri, Illinois, and Indiana on the same day, as well as significant tornadoes in Alabama and Kansas. In addition to confirmed tornadoes, there were undoubtedly others with lesser impacts, the occurrences of which have been lost to history.
The 1965 Palm Sunday tornado outbreak was a historic severe weather event that affected the Midwestern and Southeastern United States on April 10–12, 1965. The tornado outbreak produced 55 confirmed tornadoes in one day and 16 hours. The worst part of the outbreak occurred during the afternoon hours of April 11 into the overnight hours going into April 12. The second-largest tornado outbreak on record at the time, this deadly series of tornadoes inflicted a swath of destruction from Cedar County, Iowa, to Cuyahoga County, Ohio, and a swath 450 miles long (724 km) from Kent County, Michigan, to Montgomery County, Indiana. The main part of the outbreak lasted 16 hours and 35 minutes and is among the most intense outbreaks, in terms of tornado strength, ever recorded, including at least four "double/twin funnel" tornadoes. In all, the outbreak killed 266 people, injured 3,662 others, and caused $1.217 billion in damage. In 2023, tornado expert Thomas P. Grazulis created the outbreak intensity score (OIS) as a way to rank various tornado outbreaks. The 1965 Palm Sunday tornado outbreak received an OIS of 238, making it the fourth worst tornado outbreak in recorded history.
From April 9–11, 1947, a significant tornado outbreak produced catastrophic effects over portions of the southern Great Plains, in the contiguous United States. The outbreak generated at least 12, and possibly 17 or more, tornadoes, many of which were significant. On Wednesday, April 9, a series of related tornadoes spawned by a single supercell, dubbed the Glazier–Higgins–Woodward tornadoes, swept through the U.S. states of Texas, Oklahoma, and Kansas. Most of the damage and nearly all of the deaths are still blamed on one large tornado, known as the Glazier–Higgins–Woodward tornado, that traveled 98 mi (158 km) from Texas to Oklahoma, beginning over the South Plains. This event, up to nearly 2 mi (3.2 km) in width, was often compared to the Tri-State tornado, because it was originally thought to have left a 198-to-221-mile-long path, was similarly large and intense for much of its path, and was also retroactively rated F5 on the modern-day Fujita scale, but it is now believed to have been part of a 125-to-170-mile-long family of nine or 10 tornadoes.
This article lists various tornado records. The most "extreme" tornado in recorded history was the Tri-State tornado, which spread through parts of Missouri, Illinois, and Indiana on March 18, 1925. It is considered an F5 on the Fujita Scale, holds records for longest path length at 219 miles (352 km) and longest duration at about 3+1⁄2 hours. The 1974 Guin tornado had the highest forward speed ever recorded in a violent tornado, at 75 mph (121 km/h). The deadliest tornado in world history was the Daulatpur–Saturia tornado in Bangladesh on April 26, 1989, which killed approximately 1,300 people. In the history of Bangladesh, at least 19 tornadoes killed more than 100 people each, almost half of the total for the world. The most extensive tornado outbreak on record was the 2011 Super Outbreak, which resulted in 367 tornadoes and 324 tornadic fatalities, whereas the 1974 Super Outbreak was the most intense tornado outbreak on tornado expert Thomas P. Grazulis's outbreak intensity score with 578, as opposed to the 2011 outbreak's 378.
The 1985 United States–Canada tornado outbreak, referred to as the Barrie tornado outbreak in Canada, was a major tornado outbreak that occurred in Ohio, Pennsylvania, New York, and Ontario, on May 31, 1985. In all 44 tornadoes were counted including 14 in Ontario, Canada. It is the largest and most intense tornado outbreak ever to hit this region, and the worst tornado outbreak in Pennsylvania history in terms of deaths and destruction.
A deadly series of at least 33 tornadoes hit at least 10 different U.S. states on May 9–11, 1953. Tornadoes appeared daily from Minnesota in the north to Texas in the south. The strongest and deadliest tornado was a powerful F5 tornado that struck Waco, Texas on May 11, causing 114 of the 144 deaths in the outbreak. Alongside the 1902 Goliad tornado, it was the deadliest tornado in Texas history and is the 11th deadliest tornado in U.S. history. The tornado's winds demolished more than 600 houses, 1,000 other structures, and over 2,000 vehicles. 597 injuries occurred, and many survivors had to wait more than 14 hours for rescue. The destruction dispelled a myth that the geography of the region spared Waco from tornadoes, and along with other deadly tornadoes in 1953, the Waco disaster was a catalyst for advances in understanding the link between tornadoes and radar-detected hook echoes. It also generated support for improved civil defense systems, the formation of weather radar networks, and improved communications between stakeholders such as meteorologists, local officials, and the public.
The 1994 Palm Sunday tornado outbreak was the third notable US tornado outbreak to occur on Palm Sunday and the second to take place in the Southeastern United States. The outbreak produced 29 tornadoes from Texas to North Carolina, killing 40 people and injuring 491, and causing $140 million in damage. The deadliest storm of the outbreak, as well as in the US in 1994, was an F4 tornado that devastated Piedmont, Alabama. It struck the Goshen United Methodist Church right in the middle of the Palm Sunday service, collapsing the roof on the congregation and killing 20 people inside, including the Rev. Kelly Clem's 4-year-old daughter Hannah. Two other houses of worship were also destroyed mid-service. The supercell that formed this tornado tracked for 200 miles (322 km) to South Carolina.
The 1967 Oak Lawn tornado outbreak was a destructive tornado outbreak and severe weather event that occurred on April 21, 1967, across the central Midwest, in particular the towns of Belvidere and Oak Lawn, Illinois, United States. Locally known as 'Black Friday,' it was the largest tornado outbreak of 1967 and has been described by NWS Chicago as "Northern Illinois' worst tornado disaster". The outbreak produced numerous and significant (F2+) tornadoes, with ten of them in Illinois alone. Included was one of just six documented violent (F4/F5) tornadoes in the Chicago metropolitan area since the area was first settled.
On Thursday, March 27, 1890, a major tornado outbreak struck the Middle Mississippi Valley. To this day, this outbreak is still one of the deadliest tornado events in United States history. At least 24 significant tornadoes, several of which were generated by cyclic supercells, were recorded to have spawned from this system, and at least 187 people were killed by tornadoes that day, including a devastating F4 tornado that struck Downtown Louisville, Kentucky, killing at least 115 people and injuring at least 200 others. Five other violent tornadoes occurred elsewhere, including a long-tracked F4 tornado family that crossed two states, killing 21 people and injuring 200, and two other F4s that killed 14 altogether. A pair of F3s near the Tennessee–Kentucky state line may have killed a combined 37 people.
On March 28, 1920, a large outbreak of at least 37 tornadoes, 31 of which were significant, took place across the Midwestern and Southern United States. The tornadoes left at least 153 dead and at least 1,215 injured. Many communities and farmers alike were caught off-guard as the storms moved to the northeast at speeds that reached over 60 mph (97 km/h). Most of the fatalities occurred in Georgia (37), Ohio (28), and Indiana (21), while the other states had lesser totals. Little is known about many of the specific tornadoes that occurred, and the list below is only partial.
The 1955 Great Plains tornado outbreak was a deadly tornado outbreak that struck the southern and central U.S Great Plains States on May 25–26, 1955. It produced at least 48 tornadoes across seven states including two F5 tornadoes in Blackwell, Oklahoma, and Udall, Kansas that caused most of the casualties. The outbreak killed 102 people while injuring hundreds more. Unusual electromagnetic activity was observed, including St. Elmo's fire.
A series of at least four tornadoes hit the Southeastern United States during March 3-4, 1966. The worst event was a violent and long-lived F5 tornado, dubbed the Candlestick Park tornado after the name of a recently opened Jackson, Mississippi shopping center that was leveled by the storm. The storm would bring catastrophic damage in Mississippi and Alabama along a 202.5-mile (325.9 km) track. The outbreak killed 58, injured 521, and caused $75.552 million in damage.
The tornado outbreak sequence of May 1896 was a series of violent and deadly tornado outbreaks that struck much of the Central and Southern United States from May 15 to 28, 1896. It is considered one of the worst tornado outbreak sequences on record with tornado expert Tom Grazulis stating that the week of May 24–28 was "perhaps the most violent single week of tornado activity in United States history". There were four particularly notable tornado outbreaks during the two-week period. It produced three F5 tornadoes as well as the third deadliest tornado ever in United States history. A total of at least 484 people were killed during the entire outbreak sequence by at least 38 different tornadoes which struck Texas, Oklahoma, Kansas, Nebraska, Kentucky, Iowa, Illinois, Michigan, Missouri, Pennsylvania, New Jersey and Maryland.
A deadly tornado outbreak affected much of the central and Southern United States from April 29 – May 1, 1909. Affecting particularly the Mississippi and Tennessee Valleys, it killed over 180 people, more than 90 of them in the U.S. state of Tennessee alone. The deadliest and longest-tracked tornado of the outbreak was a violent F4 tornado family that tracked across portions of northern Mississippi and western Tennessee on April 29, claiming at least 29 lives. Another deadly F4 tornado struck portions of southern Tennessee early the next day, killing 31. Other F4s in southern Missouri and southern Illinois on April 29 killed a combined 16 people. Deadly F3s in Georgia and Tennessee from April 30–May 1 killed a total of at least 53 people as well.
The tornado outbreak sequence of May 25–June 1, 1917 was an eight-day tornado event, known as a tornado outbreak sequence, that killed at least 383 people, mostly in the Midwestern and parts of the Southeastern United States. It was one of the most intense and longest continuous tornado outbreak sequence on record, with at least 66 tornadoes including 15 that were analyzed to have been violent (F4–F5) based upon reported damage. The deadliest tornado of the entire sequence produced a 155-mile (249 km) track across Illinois, killing 108 people and devastating the towns of Charleston and Mattoon along with small farming communities. Once believed to have traveled 293-mile (472 km) across Illinois and into Indiana, it is now assessed to have been a tornado family of four to eight separate tornadoes. This tornado outbreak is one of only 3 outbreaks or outbreak sequences to reach the classification of a Super Outbreak, with an Outbreak Intensity Score of 296.
On April 19–21, 1920, a multi-day severe weather event affected the Southeastern United States. The most intense portion of the outbreak occurred on the morning of April 20. At least seven tornadoes affected the American U.S. states of Mississippi, Alabama, and Tennessee, six of them rated violent F4s on the Fujita scale. The tornado outbreak killed at least 243 people.
On December 18–20, 1957, a significant tornado outbreak sequence affected the southern Midwest and the South of the contiguous United States. The outbreak sequence began on the afternoon of December 18, when a low-pressure area approached the southern portions of Missouri and Illinois. Supercells developed and proceeded eastward at horizontal speeds of 40 to 45 miles per hour, yielding what was considered the most severe tornado outbreak in Illinois on record so late in the calendar year. Total losses in the state were estimated to fall within the range of $8–$10 million.
This page documents notable tornadoes and tornado outbreaks worldwide in 1973, but mostly features events in the United States. According to tornado researcher Thomas P. Grazulis, documentation of tornadoes outside the United States was historically less exhaustive, owing to the lack of monitors in many nations and, in some cases, to internal political controls on public information. Most countries only recorded tornadoes that produced severe damage or loss of life. Consequently, available documentation in 1973 mainly covered the United States. On average, most recorded tornadoes, including the vast majority of significant—F2 or stronger—tornadoes, form in the U.S., although as many as 500 may take place internationally. Some locations, like Bangladesh, are as prone to violent tornadoes as the U.S., meaning F4 or greater events on the Fujita scale.
A deadly late-season tornado outbreak, the deadliest on record in December, produced catastrophic damage and numerous fatalities across portions of the Southern United States and Ohio Valley from the evening of December 10 to the early morning of December 11, 2021. The event developed as a trough progressed eastward across the United States, interacting with an unseasonably moist and unstable environment across the Mississippi Valley. Tornado activity began in northeastern Arkansas, before progressing into Missouri, Illinois, Tennessee, and Kentucky.
Throughout the evening hours of December 10, 2021, a large and destructive tornado, sometimes referred to as the 2021 Tri-State tornado, the 2021 Leachville tornado, or the 2021 Monette tornado, struck areas in and around the cities and communities of Monette and Leachville in Arkansas, Braggadocio and Hayti in Missouri, and Tiptonville and Samburg in Tennessee, killing eight people and injuring 16 others. The tornado was the second strongest and third deadliest of the tornado outbreak of December 10–11, 2021. The tornado reached peak intensity twice, the first time east of Braggadocio and the second time in Tiptonville, leading the National Weather Service to assign a rating of low-end EF4 on the Enhanced Fujita scale, with maximum wind speeds estimated at 170 mph (270 km/h).