The List of the Strongest Tornadoes Ever Recorded: Part IV

The Hudsonville, Michigan, tornado of 1956 is not included in the “strongest tornadoes” list because it occurred before the development of the Fujita Scale. Photographic evidence, however, indicates that the F5 tornado caused some of the most intense wind damage ever documented. Large homes were reduced to bare slabs, vegetation was scoured completely from the ground and vehicles were thrown long distances and mangled beyond recognition. A detailed image gallery of the tornado’s destruction, including full color photographs, can be found here.

□ For a tornado to be considered for categorization, it must have caused at least one fatality and occurred after 1970. Damage intensity and, to a lesser extent, wind duration are the only variables considered, without regard to total path length, width or monetary loss. Objectivity is attempted through the use of damage photographs and reliable survey reports.

While far from definitive, this list is the result of hundreds of hours of research, e-mails across the country and conversations with other storm chasers. I believe it is as accurate a list as is available. It is flexible and always open to change.

The indefinitive list of the strongest tornadoes ever recorded:

1. Jarrell, Texas – May 27, 1997

2. Smithville, Mississippi – April 27, 2011

3. Kemper County (Philadelphia), Mississippi – April 27, 2011 

4. Bridge Creek, Oklahoma – May 3, 1999    

5. Bakersfield Valley, Texas – June 1, 1990 

6. Phil Campbell, Alabama – April 27, 2011

7. El Reno, Oklahoma – May 24th, 2011

8. Smithfield, Alabama – April 4, 1977    

9. Brandenburg, Kentucky – April 3, 1974 

10. Andover, Kansas – April 26, 1991

11. New Hartford (Parkersburg), Iowa – May 25, 2008

12. Joplin, Missouri – May 22, 2011

13. Guin, Alabama – April 3, 1974 

14. Moore, Oklahoma – May 20, 2013

15. Mulhall, Oklahoma – May 3, 1999

16. Wheatland, Pennsylvania – May 31, 1985

17. Rainsville, Alabama – April 27, 2011

18. Barneveld, Wisconsin – June 8, 1984

19. Will County (Plainfield), Illinois – August 28, 1990

20. Xenia, Ohio – April 3, 1974

Vegetation damage is good method of comparing tornado intensity. The above pictures show damage to pine trees (with relative intensity increasing from left to right). At left, damage from the Phil Campbell tornado, at center, a streak of extreme damage following the Rainsville tornado, and at right, a pine forest scoured to the ground

Vegetation damage is a fairly reliable method of comparing one tornado to another. The above pictures show damage to pine trees (with relative intensity increasing from left to right). At left, damage from the Phil Campbell tornado. At center, a streak of extreme damage following the Rainsville tornado. At right, a pine forest scoured to the ground in Smithville, Mississippi.

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20. Xenia, Ohio – April 3, 1974

The Xenia tornado was at peak intensity and entering Windsor Park when a high school student took the only known film of the storm from his home on Ridgebury Drive.

□ On the afternoon of April 3rd, 1974, a violent supercell thunderstorm passed to the south of Dayton, Ohio. At 4:30pm, one of the most well-known tornadoes in United States history touched down just east of Sugarcreek Reserve, nine miles southwest of the city of Xenia. The storm began its life as a series of transient funnels rotating beneath a violent mesocyclone. Over the course of ten minutes, the multi-vortex tornado solidified and gained strength. By the time it reached the western edge of Xenia, winds in the storm had reached F5 intensity.

The newly developed community of Windsor Park, which straddled the west side of the US 35, took the full brunt of the powerful tornado as it entered the city. Entire rows of small, brick homes were swept completely away as the tornado ripped through the neighborhood at 50mph. Nine fatalities occurred in six houses that were obliterated near the intersection of Roxbury Drive and Gayhart Court. The deaths included three teenagers, a pregnant woman and a mother and her young son (I Dream of Genealogy, 2012). An aerial damage survey later documented a trail of clean foundations all the way to the US-35. Extreme damage continued as the tornado roared past an elementary school, obliterating homes in the Arrowhead subdivision. Structural damage in the area indicated that the tornado had weakened slightly, with the last instances of clear F5 damage occurring on Wigwam Trail, where two people died.

Downtown Xenia was struck by the tornado just before 4:45pm. Businesses and homes in the densely populated center of town were severely damaged, leading to more than a dozen fatalities, including five deaths at an A&W Root Beer stand. In total, 30 people were killed in Xenia, and monetary losses totaled more than 100 million dollars. Three miles outside Xenia, the tornado caused its final two fatalities as it roared through the town of Wilberforce.

An extensive search and rescue operation uncovered a total of 32 victims. Two more were killed in a fire during clean up operations, leading most sources to cite 34 fatalities for the event. In the weeks following the storm, extensive media coverage descended upon Xenia, which suffered the most damage of any city during the Super Outbreak. Due to the incredible destruction, the Xenia tornado was deemed “the strongest” of the outbreak, a belief that was furthered when it became one of six tornadoes awarded an F5 rating. In reality, damage throughout most of the city was in the F3 range. The number of empty foundations in Windsor Park was impressive, but the houses were small and likely of only moderate construction. The shear breadth and consistency of the damage in western Xenia, however, solidified the storm’s place as one of the most impressive of the 20th century.

Aerial view of Windsor Park, where the most intense damage was documented. After crossing the US 35, the tornado entered the Arrowhead subdivision, where the final instances of clear F5 damage occurred.

Close aerial view of empty foundations in Windsor Park. Nine fatalities occurred near the four-way intersection at top center, primarily on Commonwealth and Roxbury Drive.

At left, damage in the Arrowhead subdivision, with pronounced wind rowing near Arrowwood Elementary School. At right, view of F5 damage around the US-35.

At top, satellite view of the damage swath through Xenia and Wilberforce. The most intense damage is visible on the west side of town, with the storm’s path becoming less pronounced as it continued to the northeast. At bottom, view of damage around Arrowwood Elementary School.

19. Will County (Plainfield), Illinois – August 28, 1990

The Will County tornado remains the only F5 ever documented in the month of August. Despite tearing through a populated area, no photographs exist of the tornado as it was completely wrapped in heavy rain. Several videographers, however, captured the rotating supercell that spawned the tornado. (Top image by Steve Longmire – used with permission)

□ On a stormy August afternoon in 1990, an unusual off-season tornado touched down in a farm field to the west of Chicago. The funnel was imbedded within a violent high-precipitation thunderstorm that was traveling southeast towards populated sections of Will County. Heavy rain surrounding the tornado made it indiscernible to those in its path. Conventional weather radar failed to identify a hook echo, so no tornado warning was issued. The sirens across the area remained silent.

As the tornado approached the US 30, one mile to the west of Plainfield, the inner core of the storm rapidly intensified and narrowed to only 10 yards in width. Thick clouds of dirt and vegetation were ripped from the ground as the narrow vortex crossed the highway, hurling four vehicles into the air. A tractor hauling a metal storage trailer was impacted directly by the column of F5 winds. The tractor was thrown 100 yards into a cornfield in one throw, killing the driver. The 20-ton trailer was torn from the tractor and centrifuged around the center of the storm, bouncing several times before landing a quarter mile from the road. Another car was lifted into the tornado by violent inflow winds and whirled a half mile through the air without impacting the ground. The driver of the car, who had been wearing a seatbelt, was ejected from the vehicle and found dead later that evening (Fujita, 1993). In total, four motorists were killed in vehicles on the US 30, all of them caught unexpectedly while driving on a rainy day.

Before entering Plainfield, the core of the storm expanded to 70 yards in width and weakened slightly. Well-constructed homes on the southern edge of town were leveled, and a large metal dumpster was wrapped around the top of a partially debarked tree. The Plainfield High School was directly impacted by the rain wrapped tornado as it crossed Commercial Street, causing three fatalities. Aerial imagery revealed that the tornado left a pronounced streak of damage as it continued to the southeast at 45mph. Large homes in Lily Cache and Crystal Lawns were splintered in F4 fashion, leading to seven additional fatalities.

Near the end of its life, the tornado struck the Crest Hill Lake Apartments. Nine residents died when the top two stories of an apartment building were obliterated. Some of the bodies were hurled more than 100 yards into a cornfield east of the apartments. One boy, who was the sole survivor of a family of four, later told a reporter “I was looking out the window at my brother who was coming home from football practice, and I thought, ‘Man, it’s getting dark.’ Then — boom! — I was out in a cornfield” (Grimm, 2010).

Professor Fujita conducted an aerial damage survey the day after the tornado and selected an F5 rating due to the severity of the vegetation damage around the US 30, which he described as being “comparable to the worst I have ever seen.” According to Fujita, “The damage in the cornfield southeast of US 30 was entirely different from the damage adjacent to structures affected by the F3 or F4 winds…In the worst damage area, corn crops were blown away entirely, leaving behind the remnants of small roots connected to the underground root system” (Fujita, 1993). Twenty nine lives were lost in Will County, and more than 200 homes were obliterated.

Aerial view of the tornado’s path through Plainfield. The most intense vegetation damage occurred along the US 30, visible at lower left. (Image courtesy of Steve Longmire)

Aerial views of F5 vegetation damage. Fujita noted multiple instances of unusual “comma” and “eye” shaped patterns throughout the damage path. At left, the 10 yard wide core of extreme ground scouring is clearly visible. (Right image courtesy of Steve Longmire)

Four photographs included in Fujita’s article on the Plainfield tornado. Vegetation was ripped completely from the ground. At top right, view of the 20-ton storage trailer that travelled more than half a mile as it was spun around the center of the vortex. (Fujita, 1993)

Scenes of destruction in and around Plainfield. At left, the devastated Plainfield High School, which was days away from re-opening for the Fall semester. At center, a mixture of F0 to F4 damage in Lily Cache. Some homes were swept from their foundations, but none were determined to have been well-constructed. At right, a large dumpster that was wrapped around the top of a partially debarked tree.

Aerial view of rescue efforts at the devastated Crest Hill Lake Apartments, where nine people lost their lives. (Image by Frank Hanes)

18. Barneveld, Wisconsin – June 8, 1984

The Barneveld tornado rapidly intensified as it passed directly through the center of the small town, leveling businesses and homes along Main Street. Winds in the tornado reached F5 intensity on the eastern side of town (just out of frame to the right). More than a third of the town’s population was killed or injured in the tornado. (Courtesy of the Wisconsin State Collection)

□ In the midst of a nighttime lightning storm on June 8th, 1984, residents of Barneveld were awoken by an electrical surge that sent fire alarms and appliances into a beeping frenzy. Moments later, the power across the tiny town flickered and went out. As people prepared to fall back asleep, a sound like “dry and distant thunder” was heard off to the west. The barely audible rumble soon became a deafening roar, awakening even the heaviest sleepers, some of whom suspected they were in the path of a crashing jumbo jet. A massive surge of wind driven debris followed, and soon a third of the town lay in ruins.

The deadly tornado followed Main Street directly through the center of Barneveld, splintering businesses and homes within its 300 yard wide path of destruction. Aerial damage photographs indicate that the tornado was intensifying as it passed through town. On the northeast edge of Barneveld, a cluster of homes on Swiss Lane was swept completely away. Seven of the tornado’s nine fatalities occurred in four adjacent homes in this area. The deaths included a couple and their eight year old daughter who were found 200 yards from their obliterated home. The only surviving member of the family, a one year old boy, was left paralyzed from the waist down (Brueck, Woodard, 2009). Trees near the empty foundations were debarked, and vehicles from the neighborhood were hurled long distances and rendered unrecognizable. Additionally, a large and well-constructed brick church was leveled and partially swept away.

A survey team headed by Prof. Fujita awarded the tornado an F5 rating due to the damage on Swiss Lane. The devastation and high concentration of fatalities in the area was indicative of exceptional intensity. Considering the unusual hour that the storm struck, it is remarkable the death toll was not higher. Many of the survivors credited their survival to the power surge, which preceded the tornado by several minutes.

Aerial view of F5 damage on Swiss Lane, where seven of the tornado’s nine fatalities occurred. The tornado travelled from upper right to bottom left, leveling a large, well-built Lutheran Church as it exited town. (Image courtesy of the State of Wisconsin Collection)

Severe damage in Barneveld. At left, a crushed truck was thrown into an exposed basement. (Image courtesy of the State of Wisconsin Collection) At right, the mangled remains of vehicles, some of which were hurled more than 300 yards to the east of town. (Image by Allan Y. Scott)

Empty foundations and the flattened church at distance. Prior to the storm, many residents believed that Barneveld was “protected” from tornadoes by hills surrounding the town. In reality, steep terrain has no affect on the movement of tornadoes. (NOAA)

17. Rainsville, Alabama – April 27th, 2011

Views of the Rainsville tornado as it crosses Main Street and rapidly intensifies. At right, image of the tornado at peak intensity as it crossed Lingerfelt Road. (Video stills by YORKBAMA)

Views of the Rainsville tornado as it crosses Main Street and rapidly intensifies. At right, image of the tornado in the vicinity of Lingerfelt Road. (Video stills by YORKBAMA)

□ The Rainsville tornado left an unusual swath of destruction through northeastern Alabama during the 2011 Super Outbreak. The intensity of the damage varied tremendously in affected areas of DeKalb County. In some instances, seemingly undamaged trees stood less than 100ft from well-constructed homes that were swept completely away from their foundations. Along the tornado’s 34 mile streak of devastation, 25 people were killed and more than 100 frame homes were obliterated.

The tornado touched down east of Fyffe and travelled roughly parallel to Highway 75 at a forward speed of 60mph. Video evidence suggests that the tornado had a complex multiple vortex structure. The first fatalities occurred as the tornado crossed Main Street, devastating homes and businesses in eastern Rainsville. A school bus parked at the DeKalb County School Coliseum was thrown 100 yards and stripped to its metal chassis.

The tornado rapidly intensified north of Main Street and reached peak intensity as it swept over Lingerfelt Road, where several well-constructed homes vanished. Some of the most intense tornado damage ever documented occurred at 1608 Lingerfelt Road, where a two-story brick home was swept completely away. An NWS survey found that an 800lb anchored safe had been ripped from the home’s foundation and thrown 200 yards to the northeast. The door to the safe, which had been closed, was torn open and completely off. A large concrete porch weighing thousands of pounds was shattered and blown away from the destroyed home. Additionally, sections of pavement were ripped from the residence’s driveway, and the home owner’s truck was rendered completely unrecognizable after being thrown more than 250 yards (NWS, 2011). The damage to this single property is the reason for the inclusion of the Rainsville tornado in the list of the strongest tornadoes ever recorded.

Incredible damage also occurred at several nearby properties. Large stone pillars were ripped from the ground at one home, and a section of slab foundation was uprooted at another. Damage patterns suggest that the EF5 damage was caused by extremely powerful suction vortices that made brief contact with the ground, leading to the erratic nature of the destruction. Grass scouring and pock marks from high speed debris were also photographed near Lingerfelt Road and areas to the north, further evidence of the tornado’s awesome power.

More images detailing EF5 damage on Lingerfelt Road can be found here.

Views of damage near Rainsville. At left, only the twisted chassis of a school bus remained after the tornado crossed Main street. At right, severe tree damage near Crow Lane.

View of 1608 Lingerfelt Road, where an NWS survey team documented some of the most intense tornado damage ever recorded. The owners of the large, two-story brick home survived with several neighbors in an underground storm shelter. The tornado breeched the top of the storm cave, partially exposing the people huddled inside. An interesting feature of the damage was the sharp boundary  (marked by scoured grass) separating the EF5 damage from standing trees a short distance to the east. Trees immediately south of the home were blown over but not debarked, whereas vegetation across the street was stripped bare. Visible grass and pavement scouring a few yards north of the home hints at the presence of a powerful wind feature that descended from the tornado and made contact with the ground after passing over the foundation.

At left, the cab of the truck that was thrown a quarter mile from the Robinson residence. This was the largest piece that remained of the vehicle. At right, the 800lb safe that was ripped from its anchorage and thrown 300 yards. 9Images by Colt Robinson)

At left, the cab of the truck that was thrown 250 yards from the Robinson residence (1608 Lingerfelt Road). This was the largest piece that remained of the vehicle. At right, the 800lb safe that was ripped from its anchorage and thrown 200 yards. (Images and information by Colt Robinson)

At left, view of debarked trees and severe vegetation damage northeast of Rainsville. (Image by Mark Almond) At right, a road scoured of grass near Sylvania. (Image by Melissa Smith)

At left, view of debarked trees and severe vegetation damage northeast of Rainsville. Pavement scouring is visible at right center (Image by Mark Almond). At right, another instance of pavement scouring near Sylvania (Image by Melissa Smith).

Aerial view of devastation along County Road 441. At bottom, a before view of two large homes visible in the lower left corner of the top image. A survey team documented vegetation scouring and sections of sidewalk that were torn from the ground in this area.

16. Niles, Ohio and Wheatland, Pennsylvania – May 31, 1985

Mike Zahurak photographed the tornado from the Village Center Shopping Plaza as it crossed over Lantern Lane at F5 intensity. An excellent website with information on the tornado can be found here.

□ In the summer of 1985, an unprecedented outbreak of long-tracked tornadoes swept through eastern Ohio, Pennsylvania, New York and Ontario. The event was notable not only for the incredible intensity and longevity of the storms but also for being the only violent tornado outbreak ever recorded in the region. In total, the storm system killed 88 people across the United States and Canada and left more than 500 million dollars in damage.

The only tornado awarded an F5 rating during the outbreak began its 47 mile path of destruction in Portage County, Ohio. After ripping through sparsely populated forestland, the tornado swept through the city of Newton Falls at F3 intensity. Damage was widespread throughout the town, but no fatalities were recorded. As the tornado continued eastward at 50mph it gained strength, leveling rural homes north of Lordstown. The tornado was approaching F5 intensity as it entered the outskirts of Niles, a manufacturing city south of Warren. Massive industrial tanks more than 30ft high and weighing 75,000 pounds were crumpled like soup cans, one of which was rolled 60 yards onto a nearby road. Large, well-constructed homes lining Lantern Lane were swept completely away as the tornado roared through cul-de-sacs around the Niles Union Cemetery (Grazulis, 2001). Pronounced wind rowing was noted as the tornado made a slight curve to the north and headed towards the US 422. Three people were killed as two vehicles were thrown from the road. On the west side of the highway, the Niles Park Plaza and a large skating rink were leveled and partially swept away, causing additional fatalities.

As the tornado continued eastward towards the Pennsylvania border it maintained F4 intensity and completely demolished several rural residences. The tornado remained fairly narrow throughout its life, with the primary damage path never surpassing 150 yards in width. After crossing into Pennsylvania, the storm entered the industrial area of Wheatland at F5 intensity. A man shielding two children in a ditch was torn from the ground and later found dead in the debris of a destroyed business a block away. Nearby, a six-year old boy running home from a baseball game was caught outside and killed by the storm (Ivory, 2007). Four more died in separate buildings at the intersection of Church Street and Ohio Street. The tornado may have reached peak intensity during its second wind maxima on the east side of Wheatland. A trucking plant was stripped of its roof and walls, and the steel-beam frame of the building was “twisted like a pretzel” (Grazulis, 2001). Sections of pavement were scoured from the plant’s parking lot, and surveyors documented pieces of debris and paper wedged beneath the remaining asphalt. Minutes after exiting Wheatland, the tornado weakened and dissipated.

In total, the violent tornado killed 11 people in Ohio and seven in Wheatland. A damage survey concluded that the tornado caused F5 damage both in Niles and in Wheatland. Yet despite the severity of the building damage, photographic evidence indicates the tornado failed to cause significant tree debarking in the worst affected areas. As discussed in Part II, violent tornadoes may cause some extreme damage indicators but not others. The reason why damage patterns differ so wildly is unknown.

Two views of F5 damage on Lantern Lane. At right, aerial view of large, two-story homes that were obliterated. (Grazulis, 2001)

The Niles Park Plaza was leveled and partially swept away as the tornado crossed the US 422. Next door to the plaza was the Autumn Hills Retirement Home, where several apartment buildings were completely destroyed.

Homes on the north side of Chestnut Ridge Road were obliterated as the tornado headed due east towards the Pennsylvania border. (Image by John Durkos)

Perhaps the most impressive damage caused by the F5 tornado was to a trucking plant near the end of its path in eastern Wheatland. The narrow tornado completely destroyed the building, leaving only the twisted steel frame of the structure. Sections of pavement were scoured from the business’s parking lot, an indication of extreme intensity. (NOAA Storm Data)

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Click to see:
Part I
Part II
Part III

The List of the Strongest Tornadoes Ever Recorded: Part III

Views of the EF5 tornado that caused catastrophic damage in the city of Joplin, Missouri. Like many of the deadliest tornadoes in US history, the Joplin tornado was extremely powerful and not clearly visible to those in its path. In terms of damage severity, the Joplin tornado easily caused the most intense tornado damage ever surveyed in a heavily urbanized area. (Video stills by Jeff and Kathryn Piotrowski)

□ For a tornado to be considered for categorization, it must have caused at least one fatality and it must have occurred after 1970. While an accurate list is impossible to compile, objectivity is attempted through the use of damage photographs and first-hand survey reports.

The indefinitive list of the strongest tornadoes:

1. Jarrell, Texas – May 27, 1997

2. Smithville, Mississippi – April 27, 2011

3. Kemper County (Philadelphia), Mississippi – April 27, 2011 

4. Bridge Creek, Oklahoma – May 3, 1999    

5. Bakersfield Valley, Texas – June 1, 1990 

6. Phil Campbell, Alabama – April 27, 2011

7. El Reno, Oklahoma – May 24th, 2011

8. Smithfield, Alabama – April 4, 1977    

9. Brandenburg, Kentucky – April 3, 1974 

10. Andover, Kansas – April 26, 1991

11. New Hartford (Parkersburg), Iowa – May 25, 2008

12. Joplin, Missouri – May 22, 2011

13. Guin, Alabama – April 3, 1974 

14. Moore, Oklahoma – May 20, 2013

15. Mulhall, Oklahoma – May 3, 1999

16. Wheatland, Pennsylvania – May 31, 1985

17. Rainsville, Alabama – April 27, 2011

18. Barneveld, Wisconsin – June 8, 1984

19. Will County (Plainfield), Illinois – August 28, 1990

20. Xenia, Ohio – April 3, 1974

The 1995 Kellerville tornado is not included in the “strongest” list because it caused no fatalities. A detailed report of the damage, however, concluded that “the Kellerville tornado was one of the most violent ever surveyed” and was undoubtably capable of causing F5 damage. Vegetation in the tornado’s path was “completely scoured, leaving bare soil.” Asphalt was also stripped from roads, and trees were snapped a few inches above ground level. An unusual feature of the storm was its wobbly, non-linear path – a damage feature that had not been documented before in a violent tornado (Wakimoto, Murphey, Bluestein, Dowell, 2003).

15. Mulhall, Oklahoma – May 3, 1999

Image of the Mulhall tornado from the Doppler On Wheels.

□ The May 3rd, 1999, tornado outbreak is infamous for spawning a devastating F5 tornado that thundered through Bridge Creek and the Oklahoma City suburbs. Peak doppler velocities analyzed in the storm were estimated at 281 – 321mph, the highest ever recorded. Many are unaware, however, that another powerful tornado was analyzed by the Doppler On Wheels later that evening north of Oklahoma City. While peak velocities were somewhat less intense than the Bridge Creek tornado, the incredible size and duration of the winds meant that the storm was potentially capable of causing even more extreme damage.

The tornado touched down three miles south of the town of Mulhall just before 9:30pm. Doppler velocities indicated that the storm was exceptionally large early in its development, with powerful winds expanding over an area greater than four miles in width. The monster tornado quickly developed a pronounced multiple vortex structure as it roared northeast at 30mph. Six minutes after touching down, the large tornado passed to the east of the tiny town of Mulhall. As residents took shelter, hurricane force inflow winds blew through the streets, shattering windows and knocking out power. More than a minute later, winds throughout the town increased as the tornado made its closest pass to the east. Debris loudly impacted the sides of houses as buildings disintegrated and cars tumbled in the thundering winds. The town’s water tower collapsed, sending a tidal wave of water that pushed one home off its foundation. A full four minutes later, the winds began to subside. More than three quarters of the town had been destroyed, and some well-built homes on the edge of town were nearly leveled. Outside Mulhall, a woman was killed in the complete destruction of her home. Ten miles to the north, a man was killed when his vehicle was thrown from beneath an overpass on the I-35.

Despite the severity of the damage in Mulhall, the town was outside the core circulation of the tornado and on the weaker left side of the storm. Doppler analysis indicated that the highest winds occurred on the eastern side of the tornado as sub vortices slingshotted around the right side of the storm at 120mph (Wurman, Alexander, Robinson, Richardson, 2006). Peak velocities of 246 to 257mph were recorded as the tornado strengthened north of Mulhall, and even higher values were estimated. A ring of winds greater than 185mph surrounded the core of the storm, which had a diameter of nearly one mile (Lee, Wurman, 2005). While ground level winds could not be analyzed, it is likely some locations experienced surface winds greater than 180mph for several minutes.

Few, if any damage photographs are publicly available of the areas affected by the core of the storm. The southeast corner of Mulhall, which was more than a mile from the area of strongest winds, experienced borderline F4 damage. Considering that the tornado peaked in intensity well north of Mulhall, it is almost certain the storm was capable of causing a wide swath of F5 damage.

Photographs of the vehicle in which a fatality occurred. Wind damaged grass is visible on the hillside near the destroyed car. The center of circulation passed a mile west of this location.

Despite being well away from the center of the tornado, the brick Mulhall-Orlando Elementary School was nearly leveled by the storm. (The Edmond Sun)

14. Moore, Oklahoma – May 20, 2013

View of the 2013 Moore tornado near the time at which it reached EF5 intensity near Drexel Avenue. (Video by Curtis McDonald and Charles Lubensky)

View of the 2013 Moore tornado as it approached peak intensity. (Video by Curtis McDonald and Charles Lubensky)

In the midst of a multi-day severe weather outbreak across the Great Plains, a large funnel descended from the sky in Grady County, Oklahoma. News stations in Oklahoma City interrupted regular programming to broadcast footage of the tornado as it turned towards the city’s southern suburbs at 30mph. A rare tornado emergency was issued for the metropolitan area just after 3pm.

The large tornado traversed eight miles of sparsely populated countryside before entering a period of rapid intensification a mile east of the Canadian River. Homes in wealthy subdivisions just west of Moore were swept completely away as the tornado thundered through the area, leading to five fatalities. Powerful winds engulfed an area greater than a half-mile in diameter, but the worst damage was confined to a narrow streak less than 80-yards wide. Within the worst affected areas, vegetation was ripped from the ground and large trees were shredded into featureless trunks.

The tornado was likely above the EF5 threshold as it crossed Western Avenue and ripped through Celestial Acres and other equine sports facilities, killing approximately 100 horses (Kuruvilla, 2013). Nearby, a 20,000lb water tank was ripped from its anchorage and thrown a half-mile, and an oil tank weighing more than 5,000lbs was hurled 1.3 miles (Nye, 2013). Less than a minute later, the tornado entered the densely populated neighborhoods of Moore. Briarwood Elemenatry School, located at the western edge of town, experienced EF5 damage (NWS, 2013). Several deaths occurred as rows of tightly packed homes were whipped to the ground near Santa Fe Avenue. After crossing over Penn Lane, the tornado may have reached a secondary intensity maxima as it roared over Plaza Towers Elementary School. The school’s well-built concrete walls collapsed in the storm, crushing seven children to death (Kelly, 2013). Just south of the school, six more were killed as an entire residential block was reduced to a checkerboard of bare foundations. Fields in the vicinity of Plaza Towers Elementary were stripped bare and automobiles from adjacent neighborhoods were rolled into twisted balls only a few feet across.

Hundreds of homes were leveled to the ground as the storm made a slight jog to the north, narrowly missing a large theatre complex. A 7-Eleven at the northern margin of the tornado’s damage track was obliterated, killing four people who had taken shelter in the store’s walk-in freezer (Chuck, 2013). The greatest concentration of EF5 damage throughout the tornado’s path occurred on SW 6th Street, where five well-built homes were reduced to bare foundations (Ortega, Burgess et al., 2014). The storm then made a sudden curve to the east, enveloping the Moore Medical Center and nearby businesses. Cars in the medical center’s parking lot were hurled through the air and stacked like leaves against the building’s walls, but no fatalities occurred in the complex. After crossing the I-40, the tornado abruptly narrowed but maintained extreme intensity as it tore a streak of destruction through eastern Moore. Four separate homes, each in a different neighborhood, were destroyed in EF5 fashion between Broadway Street and Sunnylane Road (Ortega et al., 2014). Approximately 40 minutes after first touching down, the tornado roped out and dissipated near the shores of Stanley Draper Lake.

The Moore tornado caused extreme vegetation damage in areas just west of the city. Large trees were completely debarked or sheared just above ground level in a swath often only 30 yards wide. Near Western Avenue, the tornado left a streak of scoured earth only 50ft away from bushes with relatively little damage.

The Moore tornado caused extreme vegetation damage in areas just west of the city. Large trees were completely debarked or sheared just above ground level in a swath often only 30 yards wide. Near Western Avenue, the tornado left a streak of scoured earth only 50ft away from bushes with relatively little damage.

Two views of EF5 home damage in Moore. Both residences were determined to have been well-constructed.

Two views of EF5 home damage in Moore. At left, a row of five well-constructed homes near the Moore Medical Center was obliterated  At right, a large, strongly anchored house was reduced to a clean foundation at the eastern edge of Moore (Ortega et al., 2014).

More than half of the 23 direct fatalities from the Moore tornado occurred in the vicinity of Plaza Towers Elementary School. Seven students were killed in the school's collapse and another six deaths occurred in homes swept completely away on ar adjacent to SW 14th Street.

More than half of the 23 direct fatalities from the Moore tornado occurred in the vicinity of Plaza Towers Elementary School. Seven students were killed in the school’s collapse and another six died in homes swept completely away on or adjacent to SW 14th Street. (Image by Geoff Legler)

13. Guin, Alabama – April 3, 1974

Despite its impressive reputation, little information is available on the Guin tornado. All of the photographs used in this article were taken from this video.

Despite its impressive reputation, little information is available on the Guin tornado. Most of the photographs used in this article were taken from this video by ABC 33/40.

As the 1974 Super Outbreak drew to a close in the Ohio River Valley, a series of powerful supercells erupted in the nighttime sky over the Deep South. Around 8:45pm, a large tornado touched down near the Mississippi/Alabama state line and rapidly roared to the northeast. Like most intense tornadoes in the South, the storm was exceptionally fast moving and buried within sheets of torrential rain and hail. Hundreds of trees were felled each second as the tornado ripped through sparsely populated sections of Lamar County. The tornado reached F5 intensity as it crossed into Marion County, devastating several rural homes before reaching the small town of Guin. Homes and businesses within a 300-yard wide swath were reduced to bare concrete slabs. According to former NWS forecaster J. B. Elliot, “even the foundations were dislodged and, in some cases, swept away” *(ABC, 2006). Survivors described a very sharp line separating the worst damage from adjacent homes that were relatively unscathed. Most of the debris from Guin was blown to the northeast and wrapped around debarked trees.

After exiting Guin, the tornado plowed through the William Bankhead National Forest, leaving a well-defined streak of damage that was later photographed by satellites. The tornado weakened as it approached Lawrence County and finally lifted near Decatur after traveling just over 100 miles. Most, if not all of the damage and fatalities occurred in the tornado’s first 40 miles on the ground. Tom Grazulis lists 20 deaths in Guin and 30 overall, whereas the NWS shows 23 fatalities in Guin and 28 total.

In recent years, the intensity of the Guin tornado has become a frequent topic of conversation on severe weather message boards. Many of the extraordinary claims (including that Prof. Fujita considered an F6 rating) appear to have originated from meteorologist J. B. Elliot, who surveyed the damage in Marion County. Little photographic evidence exists of the destruction in and around Guin, so little objective information is available to either verify or disprove personal accounts. The tornado was undoubtably a historic event, but no solid evidence exists that indicates it was any more intense than the EF5’s that struck Alabama in 2011.

Brick homes were swept completely away on the west side of Guin. According to Tom Grazulis, the tornado was one of the most intense of the 20th century and caused F5 damage both before and after striking Guin (Grazulis, 1991).

Brick homes were swept completely away on the west side of Guin. According to Tom Grazulis, the tornado was one of the most intense in Alabama’s history (circa 1991) and caused F5 damage both before and after striking Guin (Grazulis, 1991).

Aerial view of the damage swath in Guin. (Image used by C. F. Boone)

Aerial view of the damage swath in Guin. (Image used by C. F. Boone)

12. Joplin, Missouri – May 22, 2011

View of the Joplin tornado as it tears through the city at EF5 intensity.

□ On a stormy afternoon in 2011, the city of Joplin, Missouri, was struck by the most catastrophic tornado in modern history. In only twelve minutes, the exceptionally violent storm killed 158 people and destroyed more buildings than any single tornado since 1925. The event was a meteorological worst case scenario; the nearly mile-wide tornado rapidly intensified moments after touching down on the western outskirts of a densely populated area. Within five minutes of touchdown, the tornado was causing EF5 damage.

The tornado began its trek across the southern half of Joplin around 5:40pm. Storm chasers photographed the ragged funnel as it entered the city near the Twin Hills Country Club. The rapidly intensifying tornado soon became rain-wrapped and indistinguishable to those in its path. A damage survey indicated that the tornado widened and developed a pronounced multiple vortex structure moments before engulfing St. Johns Hospital. The large, ten-story medical complex was devastated by the storm, and survivors reported that patients in the ER were “sucked out of windows into the parking lot” (Sulzberger, 2011). The extreme inner core of the tornado, which passed just north of the hospital, was powerful enough to rip pavement from a parking lot and hurl thousands of cars long distances, reducing many to unrecognizable balls of twisted metal. One tractor trailer originating from St. Johns was shredded to its frame and wrapped around a debarked tree. Surveyors later noted that the tornado uprooted 300lb cement parking stops, which had been tightly anchored into concrete. A wind engineer concluded that such damage required winds of at least 205mph. Taking into account the friction from densely packed homes and businesses, winds of 205mph or greater only inches above the ground easily indicates significantly stronger winds a few yards higher up.

As the tornado continued eastward past St Johns Hospital it completely swept away brick homes along 20th Avenue. Trees and low-lying shrubs in the area were stripped entirely of bark and branches, and patches of grass were scoured from exposed hillsides. Just before roaring over Moffet Avenue, the tornado obliterated the Greenbriar Nursing Home, leading to 21 fatalities. The swath of EF3+ damage increased to a half mile in width as the tornado obliterated businesses on Main Street, and hurricane force inflow winds enveloped more than 200 city blocks. Entire neighborhoods of one and two-story frame homes were flattened and swept away as the tornado roared past Joplin High School, killing dozens. East of the high school, several three-story apartment buildings were nearly leveled to the ground, and sections of concrete curb were shattered and blown away from roadsides.

The tornado maintained EF5 intensity all the way to Rangeline Road, where it obliterated businesses and large department stores. Five people were killed after being torn out of a walk-in freezer at a Pizza Hut, and another eight perished in the destruction of a Home Depot. Surveyors later documented large sections of pavement that were scoured from parking lots near Home Depot and Walmart. As the storm continued eastward, it passed over an industrial area, leaving large warehouses as empty concrete slabs. Dozens of 18-wheeler trucks were hurled more than 300 yards and pronounced wind rowing occurred as debris was blown across Duquesne Road. In southeast Joplin, the tornado weakened but continued leveling buildings until it crossed the I-44 and swirled into a rural area east of the city. When it was all over, more than 7,000 buildings lay in ruins.

Video evidence suggests that most of the extreme damage was caused by incredibly powerful suction vortices rotating within the main funnel. The severity of the destruction was all the more impressive due to the density of structures in the tornado’s path, which would have added significant ground level friction.

A more thorough entry on the tornado can be found here.

At top, a mangled car was hurled into an empty basement. At bottom, a debarked tree with the frame of a disintegrated vehicle wrapped around it. Partial grass scouring is visible in the foreground. (Images by Dan Michaels)

Views of damage just east of St. Johns Hospital, where the tornado likely reached peak intensity. At top, a mangled tractor trailer that was wrapped around a debarked tree. Partial grass scouring is visible in the foreground. At bottom, the remains of an obliterated home. (Images by Dan Michaels)

Aerial view of EF5 damage along Iowa Avenue, where there was a high concentration of fatalities. Many of the homes that were swept away were well-constructed. Survey images taken the day after the tornado confirm that these homes were swept away by the tornado and not clean-up crews.

Views of EF5 damage along 20th Avenue. The images at top show how, in some cases, even taking shelter under a heavy table in a basement was not entirely safe. At bottom, aerial view of trees that were stripped completely bare. Vegetation damage in Joplin was noticeably more intense than vegetation damage in some other EF5 tornadoes, such as the Greensburg tornado of 2007.

Aerial view of extreme damage to large businesses and warehouses surrounding Rangeline Road. A defined trail of wind damaged grass marks the streak of worst damage. At left, a close view of two parking lots that were scoured of pavement. At top, the Walmart parking lot, and at bottom, a parking lot 100 yards to the east of the devastated Home Depot.

11. New Hartford (Parkersburg), Iowa – May 25, 2008

Two views of the EF5 tornado. The left photograph shows the tornado directly over Parkersburg. (Miles Humphrey)

□ During a wide-scale severe weather outbreak across the Great Plains, a massive tornado touched down in the cornfields of central Iowa. The wedge tornado quickly reached EF4 intensity as it thundered to the east over open farmland. Only a few minutes after forming, the intensifying tornado ripped through the small town of Parkersburg, killing seven people. The entire southern half of town was leveled, and more than 100 homes and businesses were obliterated. According to the town’s mayor, Bob Haylock, “most of those killed in Parkersburg were in basements” (NY Times, 2008). Many of the destroyed homes were swept completely away, floorboards and all, exposing people who had taken shelter underground to the full force of the tornado. Another indication of the tornado’s exceptional power was the presence of finely granulated debris throughout the damage swath (NWS Survey, 2008). Photographs reveal that much of the material from devastated buildings in Parkersburg was ground into tiny pieces the size of woodchips and deposited east of town.

The EF5 damage contour commenced on the southwest edge of town and continued intermittently for the next ten miles. Aerial photographs suggest the tornado was approaching peak intensity just east of Parkersburg as it passed over a golf course. Grass in the area was partially scoured from the ground and well-constructed homes were swept completely away. Surveyors also documented thick, well-anchored basement walls that were undermined by the tornado’s incredible winds. As the tornado continued eastward it maintained its strength and size. By the time the tornado reached a rural housing subdivision north of New Hartford, it was likely at peak intensity. Two more died as several homes were reduced to empty basements plastered in mud and debris. Trees in the area were completely debarked and cars were hurled long distances and mangled beyond recognition.

The Parkersburg tornado passed only a few miles north of downtown Waterloo. Had the tornado tracked slightly farther to the south at EF5 intensity, the number of destroyed homes could have topped 3,000. The destruction in eastern Parkersburg and New Hartford solidified the EF5 tornado’s place as one of the most intense in modern history.

Aerial view of extreme damage in Parkersburg. The damage to the industrial buildings at lower left was deemed to be of EF5 intensity (NWS Survey, 2008).

Views of EF5 damage to a home east of Parkersburg. Extreme winds knocked over thick, well-anchored basement walls and left cracks in the home’s foundation. The streak of damage east of Parkersburg was marked by partially scoured grass and pronounced wind rowing, both indications of EF5 intensity. In the image at right, view of finely mulched debris from homes more than a half mile to the west. (NWS, 2008)

The remains of a frame home in New Hartford. The woman who lived at the residence was killed despite seeking shelter in the home’s basement. Trees in the area were completely debarked, and a vehicle that was stripped to its metal frame can be seen in the background. (Jungbluth, 2008)

At top, view of the tornado’s path as it exited Parkersburg and swept away homes along a golf course. The tornado left a visible trail of partially scoured grass. At bottom, a close up view of grass nearly ripped from the ground in New Hartford. (NWS Survey)

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