Tornado outbreak sequence of April 19–24, 2011 explained

Tornado outbreak sequence of April 19–24, 2011
Type:Tornado outbreak (sequence)
Active:April 19–24, 2011
Tornadoes:134
Fujitascale:EF4
Tornado Duration:5 days, 7 hours
Highest Winds:Tornadic: 170mph
(St. Louis, Missouri EF4 on April 22)
Non-Tornadic:120mph
(Three locations on April 19)
Total Fatalities:0 fatalities, 14 injuries
Damages:≥ $300 million (2011 USD) [1] [2] [3]
Enhanced:yes
Partof:the tornado outbreaks of 2011

An extended period of significant tornado activity affected the Midwest and Southern United States from April 19 to April 24, 2011, with 134 tornadoes being spawned across six days. The outbreak sequence produced an EF4 tornado that tore through the St. Louis metropolitan area on April 22, while other tornadoes caused damage in Illinois, Indiana, Ohio, Kentucky, Texas, Oklahoma, and other parts of Missouri during the period. No fatalities were reported in this outbreak sequence. This event was directly followed by the largest tornado outbreak in the history of the United States.

Meteorological synopsis

April 19–20

A severe weather event developed across the Midwest and southern Great Plains on April 19 as a dynamic low pressure system tracked across the area. Thunderstorms began in the late afternoon and early evening with large hail and several tornadoes. Significant damage was reported near Bowling Green, Missouri and Girard, Illinois as a result of an EF3 tornado.[4] The individual storm cells later merged into a very large squall line. Overnight, the squall line tracked eastward with widespread wind damage[5] and many embedded tornadoes across several states. A few tornadoes were as strong as EF2, but most were brief and weak.[6]

April 22

Severe weather once again developed across parts of the Midwest on April 22. The St. Louis metropolitan area was hit hardest by the storm system. An EF4 tornado tracked across the region. Severe effects occurred in several communities, including houses and other buildings destroyed in Bridgeton, Ferguson, Florissant, Hazelwood, Maryland Heights, New Melle, and other communities. The tornado caused extensive damage to numerous facilities at Lambert–St. Louis International Airport, with injuries reported; airplanes were damaged from the high winds and terminal windows blew out. American Airlines claimed four of their jets were damaged, two significantly. The airport was closed for days after the tornado.[7] The EF4 tornado rating was based on finding of leveled houses in Bridgeton. Following assessments by the local National Weather Service, it was determined that a single tornado tracked for 22miles through parts of Missouri and Illinois. It reached a maximum width of 0.4miles. Elsewhere, there were several reported tornadoes, including an EF2 which tracked through Henderson, Webster, and Union counties.[8] [9] [10]

April 23–24

Scattered tornadoes were reported across the United States, but most were weak or remained over open country. However, one EF2 tornado struck the town of Bardwell, Kentucky.[11] Another EF2 tornado destroyed airplane hangars near Cairo, Illinois.[12] Tornadoes were not part of the same weather system as the earlier tornadoes; they were part of a weather system that led to the 2011 Super Outbreak.[13]

Confirmed tornadoes

April 19 event

List of confirmed tornadoes – Tuesday, April 19, 2011
EF#LocationCounty / ParishStateStart Coord.Time (UTC)Path lengthMax widthDamage
EF1SW of Bowling GreenPikeMO21:00–21:084.12abbr=onNaNabbr=on150abbr=onNaNabbr=onUnknown
Two farmhouses were heavily damaged, and a barn, farm equipment, and several outbuildings were destroyed. Another barn was damaged, and many trees were downed along the path.[14]
EF0ClarksvillePikeMO21:36–21:370.4abbr=onNaNabbr=on50abbr=onNaNabbr=onUnknown
Several houses sustained roof damage, a church had broken windows, and several carports and fences were damaged. Trees were downed as well. The tornado dissipated while crossing the Mississippi River and was accompanied by softball-sized hail.[15]
EF0N of FewellPushmatahaOK22:580.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado with no damage.[16]
EF3GirardMacoupinIL22:58–23:055.1abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
The tornado moved from west of Girard to east of town, passing north of Girard proper along a curved and winding path. West of town, two houses sustained extensive damage before the tornado, moving northeast, passed over three farmsteads. One home destroyed while another sustained moderate damage, and several barns were destroyed. More farmsteads were either damaged or destroyed, along with one house and numerous outbuildings, as the tornado moved northwest of Girard. A brick home sustained major damage, more outbuildings were destroyed, and another farm was damaged–with several cows being killed–as the tornado approached Illinois Route 4. Turning to the southeast, another brick home sustained extensive damage, with exterior walls destroyed, and yet another home sustained moderate roof damage. The tornado then caused minor damage at an additional farmstead before dissipating. Numerous trees were downed along the path, and about twenty power poles were blown down along Route 4 just north of town. Two people sustained minor injuries west of Girard while attempting to take shelter.[17]
EF1HonobiaPushmataha, Le FloreOK23:07–23:153.5abbr=onNaNabbr=on100abbr=onNaNabbr=on
This tornado was caught on camera by a storm chaser. Several large trees were snapped in the Honobia area.[18]
EF2N of FarmersvilleMontgomeryIL23:08–23:123.16abbr=onNaNabbr=on150abbr=onNaNabbr=onUnknown
Three power poles were snapped, a grain bin was rolled across Interstate 55 and deposited in a tree, and two machine sheds were destroyed. Numerous trees snapped or uprooted as well.[19]
EF2S of Honey BendMontgomeryIL23:15–23:193.51abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
Several outbuildings, sheds, and silos were destroyed, and other outbuildings and barns sustained minor to moderate damage. Numerous homes were damaged, with a large portion of the roof on one home being removed. A two-story log home sustained extensive damage as well. Trees were downed, about a dozen power poles were snapped, and power lines were knocked down onto Interstate 55, blocking traffic for roughly four hours.[20]
EF1SSW of KincaidChristianIL23:17–23:201.99abbr=onNaNabbr=on100abbr=onNaNabbr=on
Several grain bins and a large farm storage building were destroyed.[21]
EF0SSW of MorrisonvilleChristianIL23:30–23:323.48abbr=onNaNabbr=on100abbr=onNaNabbr=on
The roof was torn off a hog pen, the north doors of a large metal farm building were collapsed, and a small barn was destroyed. Several power poles were knocked down as well.[22]
EF1NE of TaylorvilleChristianIL23:32–23:330.91abbr=onNaNabbr=on100abbr=onNaNabbr=on
Eight empty railroad cars were knocked over.[23]
EF0NW of ZafraLe FloreOK23:450.1abbr=onNaNabbr=on75abbr=onNaNabbr=on
Brief tornado with no damage.[24]
EF0N of ZafraLe FloreOK23:48–23:523abbr=onNaNabbr=on125abbr=onNaNabbr=on
The tornado remained over open country and caused no damage.[25]
EF1S of Clubb to S of CascadeWayneMO00:43–00:505.16abbr=onNaNabbr=on500abbr=onNaNabbr=on
Many trees were snapped or uprooted, mostly in heavily forested conservation land.[26] [27]
EF0PattonBollingerMO00:55–00:560.5abbr=onNaNabbr=on100abbr=onNaNabbr=on
A barn was destroyed, and many trees were downed.[28]
EF1NE of ChrismanEdgarIL00:59–01:011.14abbr=onNaNabbr=on100abbr=onNaNabbr=on
The roof was torn off a house, two barns were destroyed, and a garage was damaged.[29]
EF0NE of HenningVermilionIL01:02–01:052.71abbr=onNaNabbr=on25abbr=onNaNabbr=on
Several houses sustained roof, siding, and awning damage, and trees and power poles were knocked down.[30]
EF1WNW of Newport to Wallace to CrawfordsvilleVermillion, Parke, Fountain, MontgomeryIN01:10–01:4031.15abbr=onNaNabbr=on100abbr=onNaNabbr=on
A long-track tornado downed trees and power lines and damaged houses and sheds. One shed in Vermillion County was destroyed, and another structure in Park County was damaged. The tornado was downgraded from EF2 to EF1 in final analysis.[31]
EF1E of RossvilleVermilionIL01:11–01:142.56abbr=onNaNabbr=on100abbr=onNaNabbr=on
Two houses, six grain bins, two sheds, a garage, a combine, and several pieces of farming equipment were damaged.[32]
EF0WSW of Elkville to E of DowellJacksonIL01:35–01:403.94abbr=onNaNabbr=on100abbr=onNaNabbr=on
Several carports, a camper, and a garage were destroyed. Numerous homes and barns sustained roof damage, an amateur radio tower was bent over, and numerous trees were uprooted.[33]
EF1SW of RoyaltonFranklinIL01:40–01:410.3abbr=onNaNabbr=on50abbr=onNaNabbr=on
Several houses sustained roof and structural damage, with one having partial roof loss. Trees were downed, and large tree limbs were driven into a house and barn.[34]
EF1S of LafayetteTippecanoeIN01:40–01:420.71abbr=onNaNabbr=on100abbr=onNaNabbr=on
Many large trees snapped or uprooted, with some landing on homes and one destroying a garage. Downgraded from EF2 to EF1 in final analysis.[35]
EF1BentonFranklinIL01:490.15abbr=onNaNabbr=on50abbr=onNaNabbr=on
Large oak trees were snapped and thrown several yards, other trees were uprooted, and a fence was damaged.[36]
EF0ESE of Buck CreekTippecanoeIN01:50–01:522.64abbr=onNaNabbr=on50abbr=onNaNabbr=on
A barn lost parts of its roof and siding.[37]
EF1NW of ThorntownBooneIN01:55–01:560.64abbr=onNaNabbr=on50abbr=onNaNabbr=on
Numerous trees were snapped, and a barn was destroyed.[38]
EF1E of CentraliaMarionIL02:02–02:030.36abbr=onNaNabbr=on75abbr=onNaNabbr=onUnknown
The roof of an attached garage on a home was uplifted and thrown, with a 2x4 driven into another part of the roof. Another home sustained minor roof damage, a trampoline was thrown, a small outbuilding was damaged, and a pole barn was collapsed. Several trees were uprooted as well.[39]
EF1N of Mount VernonJeffersonIL02:03–02:074.27abbr=onNaNabbr=on100abbr=onNaNabbr=on
Several houses sustained minor shingle damage, awnings and overhangs were destroyed, and many trees were snapped or uprooted.[40]
EF1SE of BlufordJeffersonIL02:06–02:081.43abbr=onNaNabbr=on100abbr=onNaNabbr=on
A house sustained heavy roof damage, several barns and sheds were either heavily damaged or destroyed, and many trees were snapped or uprooted.[41]
EF1SE of McLeansboroHamiltonIL02:19–02:243.36abbr=onNaNabbr=on150abbr=onNaNabbr=on
A small grain bin was destroyed, and hundreds of trees were uprooted.[42]
EF0NNE of AdamsboroCassIN02:19220abbr=onNaNabbr=on25abbr=onNaNabbr=onUnknown
A brief tornado destroyed a pole barn.[43] [44]
EF0E of Twelve MileCassIN02:2050abbr=onNaNabbr=on25abbr=onNaNabbr=onUnknown
This brief tornado shifted an outbuilding off its foundation, carried its roof into a field, and bent a TV antenna.
EF0W of RandlesCape GirardeauMO02:270.1abbr=onNaNabbr=on40abbr=onNaNabbr=on
A brief tornado downed a few trees and power lines and blew out a window of a house.[45]
EF2SSE of CarmiWhiteIL02:28–02:321.8abbr=onNaNabbr=on125abbr=onNaNabbr=on
Two farms were severely damaged, with barns and over a dozen grain bins destroyed, irrigation pivots overturned, and an equipment shed unroofed. Trees and power poles were knocked down, a 7-ton (6,350 kg) truck was flipped, and a large house sustained considerable roof damage, wall collapse, and blown out windows.[46]
EF1ENE of CarmiWhiteIL02:30–02:321.44abbr=onNaNabbr=on100abbr=onNaNabbr=on
A few barns and grain bins were destroyed, the roof was torn off a farm house, with windows also broken, and a mobile home was blown off its foundation. Power poles were snapped, and numerous trees were downed as well.[47]
EF2SE of Fairfield to SSW of Mount ErieWayneIL02:30–02:3710.57abbr=onNaNabbr=on150abbr=onNaNabbr=on
A house had part of its roof removed and separation of walls, a machine shed and several grain bins were destroyed, and a large tank was thrown about 150yd. Dozens of trees were snapped or uprooted, about a dozen power poles were snapped, and an outbuilding was blown across a highway. Two people were injured.[48]
EF1WSW of FairmountGrantIN02:41–02:442.53abbr=onNaNabbr=on150abbr=onNaNabbr=on
Several houses were damaged, with one having part of the roof and siding ripped off and windows broken. Trees were downed as well.[49]
EF2W of Keensburg to N of Mt. CarmelWabashIL02:48–02:5511.25abbr=onNaNabbr=on250abbr=onNaNabbr=on
Three steel transmission towers were bent down, and a single-wide mobile home was demolished, with the frame being blown about 50yd. A grain bin was blown roughly 1miles into a tree line, three more grain bins and several barns were destroyed, and machine sheds were unroofed or had collapsed walls. Numerous houses sustained minor to moderate roof damage, smaller sheds were destroyed, power poles were snapped, and hundreds of trees were snapped or uprooted.[50]
EF1W of UplandGrantIN02:48–02:512.9abbr=onNaNabbr=on50abbr=onNaNabbr=onUnknown
Homes sustained minor damage, and numerous trees were snapped.[51]
EF1NW of AllendaleWabashIL02:53–02:562.75abbr=onNaNabbr=on125abbr=onNaNabbr=on
Numerous trees were snapped or uprooted, including dense groves of pine and cedar, and power poles were knocked down. A mobile home was rolled, siding was blown off a house, and a back porch was blown off.[52]
EF1SSW of Allendale, IL to NW of Decker, INKnoxIN02:54–03:0210.91abbr=onNaNabbr=on75abbr=onNaNabbr=on
A large metal building was destroyed, another structure had windows blown in, and several high-tension towers and lines were downed.[53]
EF1Wheatonville to SE of BuckskinWarrick, GibsonIN02:57–03:024.42abbr=onNaNabbr=on75abbr=onNaNabbr=on
Two houses were damaged in Gibson County, consisting mainly of roof and siding damage. Along the entire path, signs were damaged, utility poles were snapped, and numerous trees were downed.[54]
EF1SSW of Bryant to SE of GenevaJayIN03:16–03:226.91abbr=onNaNabbr=on50abbr=onNaNabbr=onUnknown
An intermittent tornado embedded in straight-line wind damage snapped power poles, damaged two houses, and destroyed a garage, a barn, and an outbuilding.[55]
EF0W of Van WertVan WertOH03:19–03:200.46abbr=onNaNabbr=on50abbr=onNaNabbr=onUnknown
A house sustained shingle damage, and a garage was blown out, and a patio was destroyed.[56]
EF0N of HuntingburgDuboisIN03:22–03:230.3abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
A large swath of trees was downed.[57]
EF1N of IrelandDuboisIN03:22–03:253.09abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
A well-constructed 75feet tall grain silo had the top 40feet sheared off, and a large outbuilding near the silo was destroyed, with siding thrown 500yd. Straight-line wind damage was observed in the vicinity of the tornado track, with two hog buildings destroyed and a grain silo shifted on its foundation.[58]
EF0HaysvilleDuboisIN03:25–03:271.93abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
Numerous trees and tree limbs were downed.[59]
EF1SW of St. AnthonyDuboisIN03:26–03:270.38abbr=onNaNabbr=on100abbr=onNaNabbr=onUnknown
A brief tornado damaged a house and downed a few trees.[60]
EF2N of Bretzville to NNE of St. AnthonyDuboisIN03:26–03:293.26abbr=onNaNabbr=on300abbr=onNaNabbr=onUnknown
Several barns and outbuildings were destroyed, and many trees were downed.[61]
EF2RolandOrangeIN03:39–03:401.04abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
A house had windows blown in, a cabin lost shingles, a large barn lost its metal roof, and a wood outbuilding was destroyed. Many trees were downed as well.[62]
EF2CelinaMercerOH03:39–03:423.68abbr=onNaNabbr=on30abbr=onNaNabbr=on
Several houses and businesses were heavily damaged, while others sustained minor damage. Barns, garages, outbuildings, and vehicles were also destroyed. Numerous trees and power poles were downed along the path.[63]
EF1Monticello to NNW of SpencervilleVan Wert, AllenOH03:40–03:444.03abbr=onNaNabbr=on100abbr=onNaNabbr=onUnknown
Several houses were damaged, sheds and barns were destroyed, and numerous trees were downed.[64]
EF1S of French Lick (1st tornado)OrangeIN03:40–03:411.49abbr=onNaNabbr=on125abbr=onNaNabbr=onUnknown
A large metal barn was destroyed, and numerous trees were downed, with some falling on power poles. At a marina, three metal outbuildings were either damaged or destroyed: one had doors blown in, another had its roof peeled back, and the third was leveled and blown downwind. A pontoon boat was flipped as well.[65]
EF1S of French Lick (2nd tornado)OrangeIN03:40–03:410.7abbr=onNaNabbr=on75abbr=onNaNabbr=onUnknown
A barn was destroyed, a porch was removed from a house, and trees were knocked down.[66]
EF0N of St. Mary'sAuglaizeOH03:44–03:483.77abbr=onNaNabbr=on67abbr=onNaNabbr=on
A small wooden barn was destroyed, houses sustained roof damage, a pontoon boat was flipped, and trees were downed.[67]
EF0SSW of PaoliOrangeIN03:47–03:480.46abbr=onNaNabbr=on100abbr=onNaNabbr=onUnknown
Several trees were downed, and the roof was peeled off a small outbuilding.[68]
EF0E of Stephensport to ESE of PaynevilleBreckinridge, MeadeKY03:54–04:0411.46abbr=onNaNabbr=on150abbr=onNaNabbr=onUnknown
Intermittent tornado damaged several houses, including blowing an attached carport into a field and removing shingles. A barn door was blown in, and numerous trees were snapped or uprooted.[69]
EF1N of CairoAllenOH03:58–03:590.71abbr=onNaNabbr=on100abbr=onNaNabbr=onUnknown
Significant damage occurred on a farm, with a house losing its roof and a barn being destroyed. An old school bus was damaged by debris from the barn, and numerous trees has the tops blown out near a railroad.[70]
EF1NE of Livonia (1st tornado)WashingtonIN03:59–04:011.54abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
A grain bin, two silos, and a large outbuilding were destroyed, a house sustained severe damage, and another house had its roof partially removed and was pelted by driveway gravel. Several trees were downed as well.[71]
EF0NE of Livonia (2nd tornado)WashingtonIN04:00–04:011.23abbr=onNaNabbr=on75abbr=onNaNabbr=onUnknown
A grain silo and two barns were damaged, and several trees were downed.[72]
EF0NNE of SalemWashingtonIN04:07–04:080.65abbr=onNaNabbr=on50abbr=onNaNabbr=onUnknown
A house sustained roof damage, and two large outbuildings and a grain bin were destroyed.[73]
EF0N of CorydonHarrisonIN04:09–04:100.28abbr=onNaNabbr=on50abbr=onNaNabbr=onUnknown
Numerous trees were either snapped or uprooted by this brief tornado.[74]
EF0SW of Little York to NNE of AustinWashington, ScottIN04:14–04:2713.14abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
Many trees were downed and a roof was damaged along an intermittent path.[75]
EF0Scottsburg to E of DeputyScott, JeffersonIN04:19–04:3111.8abbr=onNaNabbr=on100abbr=onNaNabbr=onUnknown
Numerous houses, several agricultural buildings, and a Holiday Inn hotel were damaged. Numerous trees were downed as well.[76]
EF0N of Jeffersonville (1st tornado)ClarkIN04:28–04:290.17abbr=onNaNabbr=on75abbr=onNaNabbr=onUnknown
A very brief tornado damaged a shed and snapped a few trees.[77]
EF1N of Jeffersonville (2nd tornado)ClarkIN04:28–04:291.18abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
About 25 trailers were damaged in a mobile home park, some of which were removed from their foundations and had debris scattered long distances. Site-built homes sustained roof damage, sheds were either damaged or destroyed, a church's south side was blown out, and a trampoline was thrown into a tree. Numerous trees were downed or damaged as well.[78]
EF0NE of OregonLucasOH04:37–04:390.78abbr=onNaNabbr=on25abbr=onNaNabbr=on
One house was heavily damaged and about 24 others sustained minor damage, mostly to porches, roofs, and siding. A large camper and a small outbuilding were both destroyed, and a couple dozen trees were downed along the path.[79]
EF1S of ChinaJeffersonIN04:40–04:422.34abbr=onNaNabbr=on125abbr=onNaNabbr=onUnknown
Several outbuildings were severely damaged or destroyed, with a piece of lumber from one being thrown through a house. A large barn was destroyed, other homes and outbuildings were damaged, and numerous trees were either snapped or uprooted.[80]
EF1NE of BryantsburgJeffersonIN04:41–04:443.21abbr=onNaNabbr=on100abbr=onNaNabbr=onUnknown
A mobile home was destroyed, several barns sustained extensive roof damage, a cinder-block outbuilding had its roof removed, and a site-built house was damaged. A large garage had its door blown out, much of the roof was removed from a tobacco barn, and trees were downed.[81]
EF1NW of La GrangeOldhamKY04:49–04:500.26abbr=onNaNabbr=on80abbr=onNaNabbr=onUnknown
A barn was destroyed, a house and another barn were damaged, and several trees were snapped.[82]
EF0SW of Port ClintonOttawaOH04:55–04:571.53abbr=onNaNabbr=on30abbr=onNaNabbr=on
Two houses and several outbuildings sustained roof damage, and several trees were downed.[83]

April 20 event

List of confirmed tornadoes – Wednesday, April 20, 2011
EF#LocationCounty / ParishStateStart Coord.Time (UTC)Path lengthMax widthDamage
EF1NNE of AntiochSwitzerlandIN05:04–05:061.76abbr=onNaNabbr=on67abbr=onNaNabbr=on
Two houses lost their roofs, and three barns were destroyed north of Warsaw, Kentucky.[84]
EF0Frankfort areaFranklinKY05:28–05:334.81abbr=onNaNabbr=on30abbr=onNaNabbr=on
Trees were snapped along the track, and a few houses sustained minor damage, with the most concentrated damage in the area of the Kentucky State Capitol and the Frankfort Cemetery.[85]
EF1NE of GeorgetownScottKY05:54–05:550.51abbr=onNaNabbr=on50abbr=onNaNabbr=on
A tied-down trailer was overturned, several outbuildings were either heavily damaged or destroyed, a brick garage wall was buckled, and several trees were snapped.[86]
EF1New Holland to SW of WilliamsportPickawayOH06:14–06:194.22abbr=onNaNabbr=on200abbr=onNaNabbr=on
A brick building was damaged, a grain bin and three barns were destroyed, a trailer was overturned, and trees and tree limbs were knocked down.[87]
EF1S of GroveportFranklinOH06:22–06:252.54abbr=onNaNabbr=on100abbr=onNaNabbr=on
Two houses sustained significant roof damage, and a large wood frame storage shed with metal siding was destroyed. One power pole was snapped, several others were bent over, and many trees were downed.[88]
EF0ENE of GroveportFranklinOH06:26–06:270.12abbr=onNaNabbr=on50abbr=onNaNabbr=on
Twelve greenhouses sustained varying degrees of damage; the farthest west of the twelve was nearly destroyed. A metal door on an adjacent warehouse was bent, and a small metal shed was heavily damaged. Small trees in the greenhouses were pulled toward the center of the path, and plant transport carts pulled from a loading dock into a small pond.[89]
EF1NW of FranklinSimpsonKY06:30–06:333.67abbr=onNaNabbr=on100abbr=onNaNabbr=onUnknown
A barn was destroyed, a second barn sustained roof damage, and at least 100 trees were snapped or uprooted.[90]
EF1E of Baltimore to N of ThurstonFairfieldOH06:39–06:422.58abbr=onNaNabbr=on300abbr=onNaNabbr=on
A house and a barn were damaged, a garage was destroyed, and numerous large trees were snapped and uprooted.[91]
EF2HeathLickingOH06:42–06:453.85abbr=onNaNabbr=on100abbr=onNaNabbr=on
The tornado began just west of the Newark–Heath Airport and moved east-northeastward through Heath. Several houses and businesses were damaged, including a store that lost part of its front sign, a business that lost part of its metal roof, and a masonry building that was heavily damaged, with one wall completely collapsed and another partially collapsed. Numerous trees were snapped or uprooted along the path as well.[92]
EF1ESE of NewarkLickingOH06:51–06:520.2abbr=onNaNabbr=on75abbr=onNaNabbr=on
A mobile home was overturned, with the roof and on side being removed and blown into trees. A house sustained roof damage, and several trees were snapped or uprooted.[93]
EF0PiketonPikeOH06:51–06:520.2abbr=onNaNabbr=on50abbr=onNaNabbr=on
A brief tornado damaged a house, a mobile home, and several buildings at the Pike County fairgrounds. A shed was destroyed, and debris was strewn across the fairgrounds.[94]
EF0Zahns CornersPikeOH06:53–06:540.07abbr=onNaNabbr=on50abbr=onNaNabbr=on
Just east of Piketon, a second brief tornado damaged several houses and mobile homes (one mobile home was blown of its foundation), destroyed a storage shed, and twisted or knocked down large tree limbs.[95]
EF1SSW of MoultonLawrenceAL09:58–10:022.62abbr=onNaNabbr=on100abbr=onNaNabbr=on
The tornado moved through the William B. Bankhead National Forest on the east side of the Sipsey Wilderness. Many trees were downed along the path, which was embedded within a larger area of straight-line wind damage.[96]
EF0WNW of JunctionKimbleTX23:37–23:400.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado along Interstate 10 at mile 449 with no damage.[97]
EF1SW of Tomnolen to WSW of EuporaWebsterMS01:09–01:153.29abbr=onNaNabbr=on150abbr=onNaNabbr=on
Many trees were uprooted, and several houses were damaged, some of them by fallen trees.[98]

April 21 event

List of confirmed tornadoes – Thursday, April 21, 2011
EF#LocationCounty / ParishStateStart Coord.Time (UTC)Path lengthMax widthDamage
EF0N of LongfellowPecosTX22:51–23:093.79abbr=onNaNabbr=on300abbr=onNaNabbr=on
A tornado was confirmed based on public reports, photographs, and radar data. No known damage occurred.[99]
EF0SSE of Fort StocktonPecosTX23:18–23:238.09abbr=onNaNabbr=on200abbr=onNaNabbr=on
A tornado was confirmed based on public reports and photographs, near the area of the previous tornado. No known damage occurred.[100]
EF2N of SandersonTerrellTX23:45–23:507.82abbr=onNaNabbr=on800abbr=onNaNabbr=on
A house and a barn were destroyed, and several cedar trees were snapped or uprooted.[101]
EF1NW of StithJonesTX01:52–02:004.96abbr=onNaNabbr=on200abbr=onNaNabbr=onUnknown
Several houses sustained roof and window damage and barns, fences, and a porch were destroyed. A steel grain bin was rolled about 250yd, a gooseneck trailer was thrown about 100yd, numerous trees were downed, and a few farm animals were killed.[102]
EF0WSW of HawleyJonesTX01:550.1abbr=onNaNabbr=on100abbr=onNaNabbr=on
A rope tornado confirmed by spotters remained over open country with no damage.[103]

April 22 event

List of confirmed tornadoes – Friday, April 22, 2011
EF#LocationCounty / ParishStateStart Coord.Time (UTC)Path lengthMax widthDamage
EF0SW of WeltyOkfuskeeOK23:03–23:040.5abbr=onNaNabbr=on150abbr=onNaNabbr=on
Large cone tornado with no damage.[104] [105]
EF0Eastern VersaillesWoodfordKY23:07–23:080.75abbr=onNaNabbr=on60abbr=onNaNabbr=onUnknown
Roofs and fences sustained minor damage, and trees were downed on the east side of Versailles.[106]
EF0E of VersaillesWoodfordKY23:130.25abbr=onNaNabbr=on40abbr=onNaNabbr=onUnknown
Several trees were downed, and a few roofs were damaged.
EF0N of KansasDelawareOK23:160.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado with no damage.[107]
EF0SE of Cherokee CityBentonAR23:410.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado over open country with no damage.[108]
EF0NW of HighfillBentonAR00:050.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado near the Northwest Arkansas Regional Airport with no damage.[109]
EF1WNW of New Melle to SW of Dardenne PrairieSt. CharlesMO00:17–00:327.35abbr=onNaNabbr=on250abbr=onNaNabbr=onUnknown
One house lost half the roof, and its attached garage was destroyed. A nearby van was pushed approximately 30yd from a driveway into an open grassy area. Numerous other houses sustained mainly minor roof damage, a horse arena was demolished, and several barns and outbuildings were heavily damaged or destroyed. Many trees were downed along the path. This was the precursor to the St. Louis EF4 tornado.[110]
EF1SE of MoodysCherokeeOK00:18–00:191abbr=onNaNabbr=on200abbr=onNaNabbr=on
Several trees were uprooted.[111]
EF0NW of HenryettaOkmulgeeOK00:19–00:200.5abbr=onNaNabbr=on100abbr=onNaNabbr=on
Brief tornado over open country with no damage.[112]
EF0BentonvilleBentonAR00:210.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado over open fields with no damage.[113]
EF0SW of ByarsMcClainOK00:45–00:480.5abbr=onNaNabbr=on150abbr=onNaNabbr=on
Storm chasers observed this tornado, which produced no damage.[114]
EF1E of ByarsMcClainOK00:590.2abbr=onNaNabbr=on30abbr=onNaNabbr=on
Trees and power lines were downed, and an outbuilding was damaged.[115]
EF4NW of St. Louis to Northeastern Granite City, ILSt. Louis (MO), St. Louis (city), Madison (IL)MO, IL00:59–01:3121.3abbr=onNaNabbr=on880abbr=onNaNabbr=on
See article on this tornado – Five people were injured.[116]
EF0NW of StratfordGarvinOK01:02–01:050.4abbr=onNaNabbr=on50abbr=onNaNabbr=on
Storm chasers observed this tornado southeast of Byers, which produced no damage.[117]
EF1E of Mill SpringWayneMO01:10–01:122.07abbr=onNaNabbr=on300abbr=onNaNabbr=on
A mobile home was destroyed by a falling tree, several outbuildings and a garage were destroyed, and hundreds of trees were uprooted. Some pine trees were snapped off 3feet above the ground.
EF0SE of FameMcIntoshOK01:140.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
This brief tornado occurred over Eufaula Lake. No damage was reported.[118]
EF2SW of Highland to S of GreenvilleMadison, Clinton, BondIL01:55–02:3018.19abbr=onNaNabbr=on700abbr=onNaNabbr=onUnknown
Several barns, sheds, and farm buildings were either damaged or destroyed, and several homes sustained roof and structural damage. A farm house lost its entire roof structure and had the front wall partially collapsed, a hog farm sustained extensive damage, and a few power poles were snapped. Many trees were snapped or uprooted, with one tree falling on a home and a second falling on a carport.[119]
EF2WaterlooMonroeIL01:50–01:553.52abbr=onNaNabbr=on90abbr=onNaNabbr=onUnknown
This tornado began on the north side of Waterloo and moved east of town. Several homes and businesses sustained varying degrees of roof and structural damage, two large air conditioners were thrown 30yd from the roof of a business, and a large garage was destroyed, with debris from a garage carried 30yd40yd away. Four power poles were snapped, and numerous trees, some large, were snapped or uprooted. A minor injury occurred at Canterbury Manor Nursing Center due to flying glass from a broken window.[120]
EF1PaderbornSt. ClairIL02:02–02:061.75abbr=onNaNabbr=on80abbr=onNaNabbr=onUnknown
Six homes sustained roof damage, two power poles were snapped, and numerous trees were snapped or uprooted.[121]
EF2NE of Sturgis to SSW of RobardsUnion, Webster, HendersonKY03:50–04:0515.51abbr=onNaNabbr=on300abbr=onNaNabbr=on
Several barns and grain bins were destroyed in Union County. The tornado then moved through Webster County, where several houses were damaged in Poole. Three houses lost their roofs completely, while other homes sustained shingle loss or were damaged by falling trees. Several garages were damaged or destroyed, along with more barns and grain bins, with two grain bins wrapped around the back side of a house. Another barn and garage were destroyed southwest of Robards in Henderson County. Many trees were snapped or uprooted along the path. Two people sustained minor injuries.[122]
EF0StanleyDaviessKY04:27–04:280.2abbr=onNaNabbr=on40abbr=onNaNabbr=on
A brief, weak tornado was witnessed by law enforcement near Stanley. Power lines were downed.[123]

April 23 event

List of confirmed tornadoes – Saturday, April 23, 2011
EF#LocationCounty / ParishStateStart Coord.Time (UTC)Path lengthMax widthDamage
EF0N of SeymourJacksonIN05:35–05:423.79abbr=onNaNabbr=on50abbr=onNaNabbr=on
The tornado skipped southeast just north of Seymour. Several structures were damaged, including a house that lost part of its roof.[124]
EF0E of ConnersvilleHarrisonKY10:09–10:100.53abbr=onNaNabbr=on75abbr=onNaNabbr=onUnknown
Two large barns lost tin roofing, a small garage was completely destroyed, two small outbuildings were damaged, and pieces of oak fencing were tossed around. Around two dozen large trees were snapped or uprooted along the path.[125]
EF0W of DexterStoddardMO18:31–18:320.52abbr=onNaNabbr=on80abbr=onNaNabbr=on
A large storage building, a garage, and a shed were destroyed, and the roof of a house was damaged by a falling tree.[126]
EF0FolsomGrantKY18:59–19:001.14abbr=onNaNabbr=on25abbr=onNaNabbr=on
A garage and barn were destroyed, a home and a trailer were damaged, and numerous trees were downed.[127]
EF1ENE of Dry RidgeGrant, PendletonKY19:10–19:154.28abbr=onNaNabbr=on50abbr=onNaNabbr=on
Several houses were damaged, a barn was heavily damaged, and many trees were downed.[128]
EF1VisaliaKentonKY19:14–19:150.17abbr=onNaNabbr=on50abbr=onNaNabbr=on
A brief tornado downed numerous trees, damaged an elementary school, and destroyed an outbuilding.[129]
EF2Klondike to UrbandaleAlexanderIL19:15–19:192.9abbr=onNaNabbr=on175abbr=onNaNabbr=on
A 20feet tall hangar was destroyed at Cairo Regional Airport along with two light aircraft and a camper. Debris was blown onto the airport runways, and an anemometer at the airport was read at 118mph. Elsewhere, a mobile home was destroyed, and two homes sustained minor roof damage. Several trees were snapped or uprooted, damaging two trailers and a house.[130]
EF1BarlowBallardKY19:29–19:321.6abbr=onNaNabbr=on80abbr=onNaNabbr=on
A metal wall was damaged at a maintenance building in Barlow, and the roof was blown off a storage building at city hall. A barn sustained roof damage, a carport was blown into a tree, and two homes and another carport sustained minor roof damage. Many large trees were downed, some of which fell on homes and caused damage. Three power poles were snapped as well, cutting power to the city water plant.[131]
EF2BardwellCarlisleKY19:30–19:354abbr=onNaNabbr=on450abbr=onNaNabbr=on
The tornado began northwest of Bardwell and moved southeastward through town. A steel building was destroyed, along with entire walls of older two-story brick business buildings. Debris blocked U.S. 51 and several secondary roads. About thirty large trees were uprooted, along with about a hundred smaller trees, and over a dozen wooden power poles were broken off. Pieces of wood were driven into steel rooftops, walls of homes, and the ground, many windows were blown out, and about twenty homes and businesses sustained partial or total roof loss. A historic church sustained about US$1 million in damage as well. Two people sustained minor injuries.[132]
EF1Northern MetropolisMassacIL19:47–19:596.64abbr=onNaNabbr=on250abbr=onNaNabbr=on
This tornado began along the Ohio River and moved eastward through the northern part of Metropolis. Power poles were damaged at a barge-loading facility, the roof was blown off a trailer, and roof and power pole damage occurred at an industrial complex. Just east of the complex, portable buildings were destroyed, and a trailer was overturned. On the north side of Metropolis, homes sustained minor roof damage, more power poles were snapped, and several trees were downed, causing damage to a garage, two vehicles, and two additional homes. Along Interstate 24, part of the metal roof was torn off a large building in an industrial park, a trailer was overturned, and a barn was heavily damaged before the tornado lifted just north of U.S. 45.[133]
EF1S of Red Star to NE of Mount JudeaMadison, NewtonAR00:58–01:5428.27abbr=onNaNabbr=on880abbr=onNaNabbr=on
Hundreds of trees were downed in the Ozark National Forest, with several falling on homes and vehicles. Several outbuildings were damaged, a chicken house and a barn were destroyed, and many power poles and lines were blown down.[134]
EF0NNW of SidneyComancheTX01:130.01abbr=onNaNabbr=on30abbr=onNaNabbr=on
Brief tornado over open land with no damage.[135]

April 24 event

List of confirmed tornadoes – Sunday, April 24, 2011
EF#LocationCounty / ParishStateStart Coord.Time (UTC)Path lengthMax widthDamage
EF1NeelyvilleButlerMO05:02–05:052.97abbr=onNaNabbr=on100abbr=onNaNabbr=on
The tornado began immediately southwest of Neelyville just after midnight and moved northeast through town. Eight structures sustained minor roof and siding damage, a bank window was blown out, two mobile homes were destroyed, and six others were damaged.[136]
EF0SW of WinnemuccaHumboldtNV17:55–18:000.52abbr=onNaNabbr=on25abbr=onNaNabbr=on
This tornado was observed by several people but remained over open country with no damage.[137]
EF0N of Baird (1st tornado)CallahanTX20:28–20:321.21abbr=onNaNabbr=on30abbr=onNaNabbr=on
A few tree limbs were broken.[138]
EF0IbexShackelfordTX20:55–20:580.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado uprooted a few trees.[139]
EF0ENE of PotosiTaylorTX21:22–21:270.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado along the Taylor–Callahan county line with no damage.[140]
EF0N of Baird (2nd tornado)CallahanTX22:04–22:071.74abbr=onNaNabbr=on30abbr=onNaNabbr=on
Rope tornado photographed by storm chasers. No damage was reported.[141]
EF0SE of ScipioPittsburgOK22:05–22:060.5abbr=onNaNabbr=on100abbr=onNaNabbr=on
A barn and a house sustained roof damage, and trees and tree limbs were snapped.[142]
EF0N of Baird (3rd tornado)CallahanTX22:15–22:180.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
A few tree limbs were broken.[143]
EF0NNE of BairdCallahanTX22:24–22:355.95abbr=onNaNabbr=on500abbr=onNaNabbr=on
This large multiple-vortex tornado remained over open country with no damage.[144]
EF0SE of MonroeLe FloreOK00:030.3abbr=onNaNabbr=on150abbr=onNaNabbr=on
A house sustained roof damage, and tree limbs were snapped.[145]
EF0NW of ColemanColemanTX01:27–01:320.1abbr=onNaNabbr=on50abbr=onNaNabbr=on
Brief tornado pictured by a storm chaser with no damage.[146]
EF1Umpire to MineolaHowardAR03:54–03:593.42abbr=onNaNabbr=on75abbr=onNaNabbr=on
This tornado moved northeast from Umpire toward Mineola along Highway 84. Half the roof was torn from a house, a large storage building was destroyed, and a chicken house sustained severe damage. Many trees were snapped or uprooted along the path.[147]

St. Louis, Missouri–Madison County, Illinois

St. Louis, Missouri–Madison County, Illinois
Highest Winds:170mph
Fujitascale:EF4
Casualties:5 injuries
Damages:>$250 million (2011 USD)[148]
Enhanced:yes

See main article: 2011 St. Louis tornado. This powerful tornado began near Creve Coeur Lake at 7:59 p.m. CDT (00:59 UTC)[149] and moved into Maryland Heights, producing EF3 damage. The tornado continued eastward and reached EF4 intensity in Bridgeton, where a number of houses were completely destroyed. Afterwards the tornado traveled parallel to Interstate 70 and struck Lambert–St. Louis International Airport at EF2 intensity about 8:10 p.m. CDT (01:10 UTC). It blew out numerous windows and peeled away a large section of roof. The tornado then moved into the Berkeley neighborhood where it continued to produce EF2 damage, tearing the roofs from several homes. The tornado continued on through several more neighborhoods, causing roof damage to a church and two businesses in Ferguson, one of which completely experienced total roof loss. The storm also produced extensive tree damage and some roof damage to homes as well as partially removing the roof of an elementary school. Damage along this entire section of the storm's path was rated EF1 to low-end EF2. The tornado continued toward the Mississippi River resulting in mostly EF1 damage to trees, however EF2 damage occurred in Dellwood where extensive tree and utility pole damage occurred, and three homes lost their roofs. EF2 damage continued as the tornado crossed the Mississippi River into Madison County, Illinois, where about a hundred homes were damaged, three of which completely lost their roofs, and numerous trees were uprooted and snapped. The tornado dissipated at 8:31 p.m. CDT (01:31 UTC) in the northeastern part of Granite City, Illinois. It traveled 21.3miles and had a peak width of 880yd.[150]

See also

External links

For the latest severe weather information:

Notes and References

  1. Web site: Search Results for all U.S. States and Areas: Event Types: Tornado . Storm Events Database . National Centers for Environmental Information . 20 April 2021.
  2. Web site: Search Results for all U.S. States and Areas: Event Types: Thunderstorm Wind. Storm Events Database . National Centers for Environmental Information . 20 April 2021.
  3. Web site: Search Results for all U.S. States and Areas: Event Types: Thunderstorm Wind. Storm Events Database . National Centers for Environmental Information . 20 April 2021.
  4. Web site: National Weather Service Weather Forecast Office in St. Louis, Missouri. Illinois Event Report: EF3 Tornado. National Centers for Environmental Information. 2019. April 20, 2021.
  5. Web site: Severe Weather Event: Apr 19, 2011. Storm Prediction Center . 20 April 2021.
  6. Web site: Search Results for all U.S. States and Areas: Event Types: Tornado . Storm Events Database . National Centers for Environmental Information . 20 April 2021.
  7. Web site: Storm Prediction Center. National Oceanic and Atmospheric Administration. April 22, 2011. April 22, 2011. Storm Reports for April 22, 2011.
  8. Web site: National Weather Service Weather Forecast Office in Paducah, Kentucky. Kentucky Event Report: EF2 Tornado. National Centers for Environmental Information. 2019. April 20, 2021.
  9. Web site: National Weather Service Weather Forecast Office in Paducah, Kentucky. Kentucky Event Report: EF2 Tornado. National Centers for Environmental Information. 2019. April 20, 2021.
  10. Web site: National Weather Service Weather Forecast Office in Paducah, Kentucky. Kentucky Event Report: EF0 Tornado. National Centers for Environmental Information. 2019. April 20, 2021.
  11. Web site: National Weather Service Weather Forecast Office in Paducah, Kentucky. Kentucky Event Report: EF2 Tornado. National Centers for Environmental Information. 2019. April 20, 2021.
  12. Web site: National Weather Service Weather Forecast Office in Paducah, Kentucky. Illinois Event Report: EF2 Tornado. National Centers for Environmental Information. 2019. April 20, 2021.
  13. Web site: April 24-27, 2011: Tornado Outbreak Hits the Four State Region . National Weather Service Forecast Office in Shreveport, Louisiana . 20 April 2021.
  14. Web site: Missouri Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  15. Web site: Missouri Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 26, 2022.
  16. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 26, 2022.
  17. Web site: Illinois Event Report: EF3 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 26, 2022.
  18. Web site: Oklahoma Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 28, 2022. Web site: Oklahoma Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 28, 2022.
  19. Web site: Illinois Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 28, 2022.
  20. Web site: Illinois Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 28, 2022.
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  24. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 28, 2022.
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  26. https://archive.today/20121205032027/http://www.weather.gov/view/validProds.php?prod=PNS&node=KPAH NWS Paducah (KY) Office Report
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  28. Web site: Missouri Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022.
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  31. Web site: Indiana Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022. Web site: Indiana Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022. Web site: Indiana Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022. Web site: Indiana Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022.
  32. Web site: Illinois Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022.
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  36. Web site: Illinois Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022.
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  39. Web site: Illinois Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022.
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  41. Web site: Illinois Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 30, 2022.
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  43. Web site: National Weather Service in Northern Indiana. Damage Surveys Confirm Two Additional Tornadoes. Iowa Environmental Mesonet. April 21, 2011. May 22, 2022.
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  54. Web site: Indiana Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. May 22, 2022. Web site: Indiana Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. May 22, 2022.
  55. Web site: Indiana Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. August 22, 2022.
  56. Web site: Ohio Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. August 22, 2022.
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  92. Web site: Ohio Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  93. Web site: Ohio Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  94. Web site: Ohio Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  95. Web site: Ohio Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  96. Web site: Alabama Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  97. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  98. Web site: Mississippi Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 25, 2022.
  99. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  100. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  101. Web site: Texas Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  102. Web site: Texas Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  103. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  104. Web site: Unattributed . News 9 . April 23, 2011 . April 24, 2011 . Tornadoes Confirmed In Oklahoma, Arkansas . dead . https://web.archive.org/web/20110513113937/http://www.news9.com/story/14500512/tornadoes-confirmed-in-oklahoma-arkansas . May 13, 2011 .
  105. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  106. Web site: National Weather Service in Louisville, Kentucky. NWS Storm Damage Survey Confirms Two Tornadoes in Woodford County Kentucky From Friday Evening...April 22. Iowa Environmental Mesonet. April 25, 2011. April 21, 2022.
  107. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  108. Web site: Arkansas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  109. Web site: Arkansas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  110. Web site: Missouri Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  111. Web site: Oklahoma Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  112. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  113. Web site: Arkansas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  114. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  115. Web site: Oklahoma Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  116. Web site: Missouri Event Report: EF4 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022. Web site: Missouri Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022. Web site: Illinois Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  117. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  118. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  119. Web site: Kentucky Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022. Web site: Kentucky Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022. Web site: Kentucky Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  120. Web site: Illinois Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  121. Web site: Illinois Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  122. Web site: Kentucky Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022. Web site: Kentucky Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022. Web site: Kentucky Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 21, 2022.
  123. Web site: Kentucky Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 20, 2022.
  124. Web site: Indiana Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  125. Web site: Kentucky Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  126. Web site: Missouri Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  127. Web site: Kentucky Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  128. Web site: Kentucky Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022. Web site: Kentucky Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  129. Web site: Kentucky Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  130. Web site: Illinois Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  131. Web site: Kentucky Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  132. Web site: Kentucky Event Report: EF2 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  133. Web site: Illinois Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  134. Web site: Arkansas Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022. Web site: Arkansas Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  135. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  136. Web site: Arkansas Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  137. Web site: Nevada Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  138. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  139. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  140. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  141. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  142. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  143. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  144. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  145. Web site: Oklahoma Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  146. Web site: Texas Event Report: EF0 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
  147. Web site: Arkansas Event Report: EF1 Tornado. National Oceanic and Atmospheric Administration. National Climatic Data Center. 2011. April 24, 2022.
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Tornado outbreak sequence of April 19–24, 2011".

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