This article lists various tornado records. The most extreme tornado in recorded history was the Tri-State Tornado, which roared through parts of Missouri, Illinois, and Indiana on March 18, 1925. It was likely an F5, though tornadoes were not ranked on any scale in that era. It holds records for longest path length at 219 mi (352 km), longest duration at about 3.5 hours, and fastest forward speed for a significant tornado at 73 mph (117 km/h) anywhere on Earth. In addition, it is the deadliest single tornado in United States history (695 dead). It was also the second costliest tornado in history at the time, but has been surpassed by several others non-normalized. When costs are normalized for wealth and inflation, it still ranks third today.
The deadliest tornado in world history was the Daulatpur-Salturia Tornado in Bangladesh on April 26, 1989, which killed approximately 1,300 people. Bangladesh has had at least 19 tornadoes in its history kill more than 100 people, almost half of the total for the rest of the world.
For 37 years, the most extensive tornado outbreak on record, in almost every category, was the Super Outbreak, which affected a large area of the central United States and extreme southern Ontario in Canada on April 3 and April 4, 1974. Not only did this outbreak feature an incredible 148 tornadoes in only 18 hours, but an unprecedented number of them were violent; 7 were of F5 intensity and 23 were F4. This outbreak had a staggering 16 tornadoes on the ground at the same time at the peak of the outbreak. More than 300 people, possibly as many as 330, were killed by tornadoes during this outbreak. However, this record was later broken during the April 25–28, 2011 tornado outbreak, which resulted in 325 tornadic fatalities and had 358 tornadoes touch down.
- 1 Tornado outbreaks
- 2 Tornado casualties and damage
- 3 Largest and most powerful tornadoes
- 4 Early tornadoes
- 5 Exceptional tornado droughts
- 6 Exceptional survivors
- 7 Exceptional coincidences
- 8 See also
- 9 References
- 10 External links
Most tornadoes in single 24-hour period
The April 25–28, 2011 tornado outbreak is the most prolific tornado outbreak in US history. It produced approximately 358 tornadoes, with 209 of those in a single 24-hour period on April 27  with 11 EF4 and 4 EF5 tornadoes. 349 deaths occurred in that same 24-hour time period of which 325 were tornado related. The outbreak has also helped smash the record for most tornadoes in the month of April with 770 tornadoes, almost triple the prior record (267 in April 1974). The overall record for a single month was 542 in May 2003, which was also broken.
The infamous Super Outbreak of April 3–4, 1974, which spawned 148 confirmed tornadoes across eastern North America, held the record for the most prolific tornado outbreak for many years. Not only did it produce an exceptional number of tornadoes, but it was also an inordinately intense outbreak producing dozens of large, long-track tornadoes, including 7 F5 and 23 F4 tornadoes. More significant tornadoes occurred within 24 hours than any other week in the tornado record.
Largest outbreak in the fall
Most tornado outbreaks occur in the spring, but there is a secondary peak of tornado activity in the fall. In 1992, 95 tornadoes broke out in 41 hours of continuous tornado activity from November 21 to 23. Many other very large outbreaks have occurred in the fall, especially in November and early December.
Longest continuous outbreak
Under most definitions, the November 1992 tornado outbreak is also the longest continuous tornado outbreak, and among the largest in geographic scope, as well.
Greatest number of tornadoes spawned from a hurricane
Tornado casualties and damage
|10 deadliest Canadian tornadoes|
|1||Regina Cyclone||June 30, 1912||≥28|
|2||Edmonton tornado||July 31, 1987||27|
|3||Windsor–Tecumseh, Ontario tornado||June 17, 1946||17|
|4||Pine Lake, Alberta tornado||July 14, 2000||12|
Windsor, Ontario tornado
|August 16, 1888
April 3, 1974
|7||Barrie, Ontario tornado||May 31, 1985||8|
|=8||Sudbury, Ontario tornado
Sainte-Rose, Quebec tornado
|August 20, 1970
June 8, 1953
|=10||Bouctouche, New Brunswick tornado
Portage la Prairie, Manitoba tornado
|August 6, 1879
June 22, 1922
Sources: Environment Canada (PDF)
|10 deadliest American tornadoes|
|1||"Tri-State" (Missouri, Illinois and Indiana)||March 18, 1925||695|
|2||Natchez, Mississippi||May 7, 1840||317|
|3||St. Louis, Missouri and East St. Louis, Illinois||May 27, 1896||255|
|4||Tupelo, Mississippi||April 5, 1936||216|
|5||Gainesville, Georgia||April 5, 1936||203|
|6||Woodward, Oklahoma||April 9, 1947||181|
|7||Joplin, Missouri||May 22, 2011||162|
|8||Amite, Louisiana and Purvis, Mississippi||April 24, 1908||143|
|9||New Richmond, Wisconsin||June 12, 1899||117|
||June 8, 1953
Source: Storm Prediction Center
|10 costliest US tornadoes|
|Rank||Area affected||Date||Damage 1||Adjusted Damage 2|
|1||Joplin, Missouri||May 22, 2011||2800||2906|
|2||Tuscaloosa, Alabama||April 27, 2011||2450||2542|
|3||Moore, Oklahoma||May 20, 2013||2000||2000|
|4||Oklahoma City Metro, Oklahoma||May 3, 1999||1000||1400|
|5||Hackleburg, Alabama||April 27, 2011||1290||1339|
|6||Wichita Falls, Texas||April 10, 1979||400||1286|
|7||Omaha, Nebraska||May 6, 1975||250||1083|
|8||Lubbock, Texas||May 11, 1970||250||811|
|9||Topeka, Kansas||June 8, 1966||250||718|
|10||Windsor Locks, Connecticut||October 3, 1979||200||643|
Source: Brooks, Harold E.; C. A. Doswell (Feb 2001). "Normalized Damage from Major Tornadoes in the United States: 1890–1999". Weather and Forecasting (American Meteorological Society) 16 (1): 168–76. doi:10.1175/1520-0434(2001)016<0168:NDFMTI>2.0.CO;2. 3
1. These are the unadjusted damage totals in millions of US dollars.
2. Raw damage totals adjusted for inflation, in millions of 2013 USD.
3. A search of NCDC Storm Data indicates no tornadoes between 1999 and 2010 have caused more than $400 million in damage.
|Deadliest tornadoes by state|
|Alabama||Many towns||April 27, 2011||72|
|Alaska||-||No deadly tornadoes||-|
|Arizona||San Xavier Mission Indian Village||August 27, 1964||2|
|January 11, 1898
January 3, 1949
|California||-||No deadly tornadoes||-|
|Colorado||Thurman||August 10, 1924||10|
|Connecticut||Wallingford||August 9, 1878||34|
|Delaware||Hartly||July 21, 1983||2|
|Florida||Kissimmee||February 22, 1998||25|
|Georgia||Gainesville||April 5, 1936||203|
|Hawaii||-||No deadly tornadoes||-|
|Idaho||Ruebens||June 7, 1936||2|
|Illinois||Many towns||March 18, 1925||613|
|Indiana||Many towns||March 18, 1925||71|
|Iowa||Dewitt/Camanche||June 3, 1860||92|
|Kansas||Udall||May 25, 1955||82|
|Kentucky||Louisville||March 27, 1890||76|
|Louisiana||Gilliam||May 13, 1908||49|
|Maine||Caribou||August 11, 1954||1*|
|Maryland||La Plata||November 9, 1926||16|
|Massachusetts||Worcester||June 9, 1953||94|
|Michigan||Flint||June 8, 1953||115|
|Minnesota||St. Cloud/Sauk Rapids||April 14, 1886||72|
|Mississippi||Natchez||May 7, 1840||317|
|Missouri||Joplin||May 22, 2011||158|
|Montana||Reserve||July 26, 2010||2*|
|Nebraska||Omaha||March 23, 1913||101|
|Nevada||-||No deadly tornadoes||-|
|New Hampshire||Corydon||September 9, 1821||6|
|New Jersey||New Brunswick||June 19, 1835||5|
|New Mexico||Wagon Mound||May 31, 1930||2|
|New York||Syracuse||September 15, 1912||3*|
|North Carolina||Philadelphia||February 19, 1884||23|
|North Dakota||Fargo||June 20, 1957||10|
|Ohio||Lorain/Sandusky||June 28, 1924||85|
|Oklahoma||Woodward||April 9, 1947||113|
|Oregon||Long Creek||June 3, 1894||3*|
|Pennsylvania||Many towns||June 23, 1944||26|
|Rhode Island||-||No deadly tornadoes||-|
|South Carolina||Aiken/Timmonsville||April 30, 1924||53|
|South Dakota||Wilmot||June 17, 1944||8|
|Tennessee||Henderson||March 21, 1952||38|
|May 18, 1902
May 11, 1953
|Utah||Salt Lake City||August 11, 1999||1|
|Vermont||-||No deadly tornadoes||-|
|Virginia||Scott County||May 2, 1929||13|
|Washington||Vancouver||April 5, 1972||6|
|West Virginia||Many towns||June 23, 1944||100|
|Wisconsin||New Richmond||June 12, 1899||117|
|Wyoming||Wheatland||June 25, 1942||2|
Source: Tornado Project
|*Most recent tornado with this number of deaths|
Deadliest single tornado in world history
Deadliest single tornado in US history
The Tri-State Tornado of March 18, 1925 killed 695 people in Missouri (11), Illinois (613), and Indiana (71). The outbreak it occurred with was also the deadliest known tornado outbreak, with a combined death toll of 747 across the Mississippi River Valley.
Most damaging tornado
Similar to fatalities, damage (and observations) of a tornado are a coincidence of what character of tornado interacts with certain characteristics of built up areas. That is, destructive tornadoes are in a sense "accidents" of a large tornado striking a large population. In addition to population and changes thereof, comparing damage historically is subject to changes in wealth and inflation. The St. Louis-East St. Louis Tornado of May 27, 1896 incurred the most damages adjusted for wealth and inflation, at an estimated $2.9 billion (1997 USD). In raw numbers, the Joplin Tornado of May 22, 2011 is considered the costliest tornado in recent history, with damage totals near $2.8 billion (2011 USD). Until 2011, the "Oklahoma City Tornado" of May 3, 1999 was the most damaging.
Largest and most powerful tornadoes
Highest winds observed in a tornado
During the F5 1999 Bridge Creek – Moore tornado on May 3, 1999, a Doppler On Wheels situated near the tornado measured winds of 301 ± 20 mph (484 ± 32 km/h) momentarily in a small area inside the funnel approximately 100 m (330 ft) above ground level.
On May 31, 2013, a tornado hit rural area south of El Reno, Oklahoma. The tornado was originally rated as an EF3 based on damage; however, after data was surveyed it was concluded to be an EF5 due to a measured wind speed which topped at 296 mph (476 kmh), second only to the Bridge Creek - Moore tornado.
Winds were measured at 257–268 mph (414–431 km/h) using portable Doppler radar in the Red Rock, Oklahoma tornado during the 1991 Andover, Kansas tornado outbreak. Though these winds are possibly indicative of an F5 strength tornado, this particular tornado's path never encountered any significant structures and caused minimal damage. Thus it was rated an F4.
Longest damage path and duration
The longest track single tornado is the Tri-State Tornado, which traversed greater than 219 miles (352 km) across southeastern Missouri, southern Illinois, and southwestern Indiana in about 3.5 hours. Though there has been some discussion as to whether this was a single tornado or a tornado family, recent and ongoing detailed reanalysis has found no break in the path and in fact that the tornado began 15 miles (24 km) before previously thought.
Longest path and duration tornado family
What at one time was thought to be the record holder for the longest tornado path is now thought to be the longest tornado family, with a track of at least 293 miles (472 km) on May 26, 1917 from the Missouri border across Illinois into Indiana. It caused severe damage and mass casualties in Charleston and Mattoon, Illinois.
What was probably the longest track supercell thunderstorm tracked 790 miles (1,270 km) across 6 states in 17.5 hours on March 12, 2006 as part of the March 2006 Tornado Outbreak Sequence. It began in Noble County, Oklahoma and ended in Jackson County, Michigan, producing many tornadoes in Missouri and Illinois.
Widest damage width
The widest tornado on record may be the El Reno, Oklahoma tornado of May 31, 2013 with a width of 2.6 miles (4.2 km) at its peak. This is the width found by the National Weather Service based on preliminary data from University of Oklahoma RaxPol mobile radar that also sampled winds of 296 mph (476 km/h) which was used to upgrade the tornado to EF5. The radar measurement was later dismissed and the tornado was rated EF3 based on damage. However, a possible contender for the widest tornado as measured by radar was the F4 Mulhall tornado in north-central Oklahoma which occurred during the 1999 Oklahoma tornado outbreak. The diameter of the maximum winds (over 110 mph (49 m/s)) was over 1,600 feet (490 m) as measured by a DOW radar. Although the tornado passed largely over rural terrain, the width of the wind swath capable of producing damage was as wide as 4 mi (6.4 km).
The F4 Hallam, Nebraska tornado during the outbreak of May 22, 2004 was the previous official record holder for the widest tornado, surveyed at 2.5 miles (4.0 km) wide. A similar size tornado struck Edmonson, Texas on May 31, 1968, when a damage path width between 2 to 3 miles (3.2 to 4.8 km) was recorded from an F3 tornado.
Highest forward speed
73 miles per hour (117 km/h) from the Tri-State Tornado (other weak tornadoes have approached or exceeded this speed, but this is the fastest forward movement observed in a major tornado).
Greatest pressure drop
A pressure deficit of 100 millibars (2.95 inHg) was observed when a violent tornado near Manchester, South Dakota on June 24, 2003 passed directly over an in-situ probe that storm chasing researcher Tim Samaras deployed. In less than a minute, the pressure dropped to 850 millibars (25.10 inHg), which are the greatest pressure decline and the lowest pressure ever recorded at the Earth's surface when adjusted to sea level.
On April 21, 2007, a 194 millibars (5.73 inHg) pressure deficit was reported when a tornado struck a storm chasing vehicle in Tulia, Texas. The tornado was relatively weak and caused only EF2 damage as it passed through Tulia. The reported pressure drop far exceeds that which would be expected based on theoretical calculations.
Earliest known tornado in Europe
- The earliest recorded tornado in Europe struck Rosdalla, near Kilbeggan, Ireland on April 30, 1054. The earliest known British tornado hit central London on October 23, 1091 and was especially destructive.
Earliest known tornado in the Americas
- An apparent tornado is recorded to have struck Tlatelolco (present day Mexico City), on August 21, 1521, two days before the Aztec capital's fall to Cortés. Many other tornadoes are documented historically within the Basin of Mexico.
First confirmed tornado and first tornado fatality in present-day United States
- August 1671 - Rehoboth, Massachusetts
- July 8, 1680 - Cambridge, Massachusetts - 1 dead
Exceptional tornado droughts
Longest span without a tornado rated F5 or EF5
Before the Greensburg EF5 tornado on May 4, 2007, it had been 8 years and one day since the US had had a confirmed F5 or EF5 tornado. The last confirmed F5 or EF5 hit southern Oklahoma City and surrounding communities during the May 3, 1999 event. This is the longest interval without an F5 or EF5 tornado since official records began in 1950.
Longest distance carried by a tornado
Matt Suter of Fordland, Missouri holds the record for the longest-known distance traveled by anyone picked up by a tornado who lived to tell about it. On March 12, 2006 he was carried 1,307 feet (398 m), 13 feet (4.0 m) shy of one-quarter mile (400 m), according to National Weather Service measurements.
The small town of Codell, Kansas, was hit by a tornado on the same date (May 20) three consecutive years: 1916, 1917, and 1918. The U.S. has about 100,000 thunderstorms a year; less than one percent produce a tornado. The odds of this coincidence occurring again is extremely small.
Tanner, a small town in northern Alabama, was hit by an F5 tornado on April 3, 1974 and was struck again 45 minutes later by a second F5 (however the rating is disputed and it may have been high-end F4), demolishing what remained of the town. 37 years later, on April 27, 2011 (the largest and deadliest outbreak since 1974), Tanner was hit yet again by the EF5 2011 Hackleburg – Phil Campbell, Alabama tornado, which produced high-end EF4 damage in the southern portion of town.
Moore was hit by devastating tornadoes in 1999, 2003, 2010, and 2013, all of which were of F4/EF4 strength or greater. In total, about 20 tornadoes have struck within the immediate vicinity of Moore since 1890.
- Weather records
- List of tropical cyclone extremes
- Tornado myths
- List of F5 and EF5 tornadoes
- List of tornadoes and tornado outbreaks
- List of tornado-related deaths at schools
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