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15 Years Ago: The April 2011 Super Outbreak Of Tornadoes | Weather.com

Weather · · 2048 words · By Jonathan Erdman
Meteorological Extremity Historical Retrospective Human Tragedy

The article provides a retrospective look at the April 2011 Super Outbreak of tornadoes in the United States, detailing the casualties, financial damage, and meteorological parameters. It highlights specific events, such as the impact on Alabama and Mississippi, and references scientific studies and NWS data to illustrate the scale of the event.

open_in_new Read the original article: https://weather.com/storms/tornado/news/2026-04-23-april-2011-super-outbreak-tor…

analyticsAnalysis

20%
Propaganda Score
confidence: 95%
Minor concerns. Some persuasive language detected, but largely factual.

psychologyDetected Techniques

warning
Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.
warning
Exaggeration / Hyperbole 70% confidence
Overstating facts or claims to create a stronger emotional response.

fact_checkFact-Check Results

40 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

schedule Pending 30
check_circle Corroborated 5
verified Verified By Reference 2
help Insufficient Evidence 2
info Single Source 1
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“the April 25-28, 2011, Super Outbreak claimed 321 lives, injured 2,775 and was responsible for almost $15 billion in total damage”
CORROBORATED
Multiple independent sources (AOL/Web Search and other web results) confirm the death toll of 321, the injury count of 2,775, and the damage cost of approximately $15 billion.
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wikipedia NEUTRAL — The 1974 Super Outbreak was one of the most intense tornado outbreaks on record, occurring on April 3–4, 1974, across much of the United States. It was one of the deadliest tornado outbreaks in U.S. h…
https://en.wikipedia.org/wiki/1974_Super_Outbreak
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wikipedia NEUTRAL — The 2011 Super Outbreak was the largest and costliest tornado outbreak ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leaving catast…
https://en.wikipedia.org/wiki/2011_Super_Outbreak
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wikipedia NEUTRAL — During April 25–28, 2011, the local weather forecast offices of the National Weather Service confirmed 367 tornadoes in the United States, and Environment Canada confirmed another in Ontario. These to…
https://en.wikipedia.org/wiki/List_of_tornadoes_in_the_2011_…
+ 3 more evidence sources
verified
“making it the costliest tornado outbreak in U.S. history”
VERIFIED BY REFERENCE
Wikipedia explicitly states that the 2011 Super Outbreak was the 'costliest tornado outbreak ever recorded'.
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wikipedia NEUTRAL — The 1974 Super Outbreak was one of the most intense tornado outbreaks on record, occurring on April 3–4, 1974, across much of the United States. It was one of the deadliest tornado outbreaks in U.S. h…
https://en.wikipedia.org/wiki/1974_Super_Outbreak
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wikipedia NEUTRAL — The 2011 Super Outbreak was the largest and costliest tornado outbreak ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leaving catast…
https://en.wikipedia.org/wiki/2011_Super_Outbreak
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wikipedia NEUTRAL — During April 25–28, 2011, the local weather forecast offices of the National Weather Service confirmed 367 tornadoes in the United States, and Environment Canada confirmed another in Ontario. These to…
https://en.wikipedia.org/wiki/List_of_tornadoes_in_the_2011_…
+ 3 more evidence sources
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“Along with April 1974, it was one of only two outbreaks deemed so massive, so impactful, that meteorologists added the prefix "super" to it.”
CORROBORATED
Web search results and Wikipedia entries refer to both the 1974 and 2011 events as 'Super Outbreaks', and a specific discussion source compares the two as the primary examples of such events.
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wikipedia NEUTRAL — The 2011 Super Outbreak was the largest and costliest tornado outbreak ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leaving catast…
https://en.wikipedia.org/wiki/2011_Super_Outbreak
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wikipedia NEUTRAL — The following events occurred in April 1974:
https://en.wikipedia.org/wiki/April_1974
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wikipedia NEUTRAL — April Jace (born April Denise Laune; May 6, 1974 – May 19, 2014) was an American masters track and field athlete who ran in sprinting competitions. She was the 2011 world champion in the women's over-…
https://en.wikipedia.org/wiki/April_Jace
+ 3 more evidence sources
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“An incredible 362 tornadoes were spawned over just over 72 hours from April 25-28, 2011.”
CORROBORATED
The National Centers for Environmental Prediction (via web search) and other sources confirm 362 tornadoes occurred between April 25 and 28, 2011.
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wikipedia NEUTRAL — The 1974 Super Outbreak was one of the most intense tornado outbreaks on record, occurring on April 3–4, 1974, across much of the United States. It was one of the deadliest tornado outbreaks in U.S. h…
https://en.wikipedia.org/wiki/1974_Super_Outbreak
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wikipedia NEUTRAL — The following events occurred in April 1974:
https://en.wikipedia.org/wiki/April_1974
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wikipedia NEUTRAL — The following events occurred in April 1976:
https://en.wikipedia.org/wiki/April_1976
+ 3 more evidence sources
verified
“tornadoes were reported as far north as central New York”
VERIFIED BY REFERENCE
Wikipedia confirms the outbreak took place in the Southern, Midwestern, and Northeastern United States, and the 'List of tornadoes' page confirms the geographic reach including the Northeast.
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wikipedia NEUTRAL — The 2011 Super Outbreak was the largest and costliest tornado outbreak ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leaving catast…
https://en.wikipedia.org/wiki/2011_Super_Outbreak
menu_book
wikipedia NEUTRAL — During April 25–28, 2011, the local weather forecast offices of the National Weather Service confirmed 367 tornadoes in the United States, and Environment Canada confirmed another in Ontario. These to…
https://en.wikipedia.org/wiki/List_of_tornadoes_in_the_2011_…
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wikipedia NEUTRAL — This page documents the tornadoes and tornado outbreaks of 2011. Extremely destructive tornadoes form most frequently in the United States, Bangladesh, Brazil and Eastern India, but they can occur alm…
https://en.wikipedia.org/wiki/Tornadoes_of_2011
+ 3 more evidence sources
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“The first of four EF5 tornadoes on April 27, 2011, raked through east-central Mississippi”
CORROBORATED
Web search results (ReedTimmerTVN) mention four violent wedge tornadoes and the Philadelphia, MS tornado is identified as an EF5 in other sources.
travel_explore
web search NEUTRAL — The 2011 Super Outbreak was the largest and costliest tornado outbreak ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leaving catast…
https://en.wikipedia.org/wiki/2011_Super_Outbreak
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web search NEUTRAL — This is a list of tornadoes rated F5 on the Fujita scale, EF5 on the Enhanced Fujita scale, IF5 on the International Fujita scale, or T10-T11 on the TORRO scale, which is equivalent to an F5 rating. T…
https://simple.wikipedia.org/wiki/List_of_F5_and_EF5_tornado…
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web search NEUTRAL — Follow us on Facebook and Twitter! http://www.facebook.com/ReedTimmerTVN @reedtimmerTVN Video of four violent wedge tornadoes from different supercells in ...
https://www.youtube.com/watch?v=vhKjv9GuARQ
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“Northeast of Philadelphia, Mississippi, a swath of ground was scoured out to a depth of two feet, in some places.”
CORROBORATED
Multiple sources, including Wikipedia and specialized weather reports, confirm ground scouring up to two feet deep northeast of Philadelphia, Mississippi.
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web search NEUTRAL — During the afternoon hours of April 27, 2011, an extremely powerful and fast-moving EF5 multi-vortex tornado, known commonly as the Philadelphia, Mississippi tornado or the Philadelphia EF5, touched d…
https://en.wikipedia.org/wiki/2011_Philadelphia,_Mississippi…
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web search NEUTRAL — Northeast of Philadelphia, Mississippi, a swath of ground was scoured out to a depth of two feet, in some places.April 2011 super outbreak neshoba county mississippi ground scouring. NWS-Jackson, Miss…
https://www.yahoo.com/news/articles/april-2011-super-outbrea…
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web search NEUTRAL — Philadelphia, MS ground scouring. Extremely deep ground scouring near Philadelphia, Mississippi, caused by a fast-moving EF5 tornado that killed three people. The most powerful supercells of the outbr…
https://kids.kiddle.co/2011_Super_Outbreak
info
“On April 27, STP values reached values from 10-12 in eastern Mississippi and Alabama in the afternoon”
SINGLE SOURCE
The specific STP values of 10-12 are mentioned in one specific web search result (Weather.com) citing a study by Knupp et al., but not corroborated by other provided sources.
travel_explore
web search NEUTRAL — The 2011 Super Outbreak was the largest and costliest [note 1] tornado outbreak ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leavi…
https://en.wikipedia.org/wiki/2011_Super_Outbreak
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web search NEUTRAL — On April 27, STP values reached values from 10-12 in eastern Mississippi and Alabama in the afternoon (see Fig. 2 in the definitive April 27 outbreak study from Knupp, et al.)
https://weather.com/storms/tornado/news/2026-04-23-april-201…
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web search NEUTRAL — Historic Outbreak of April 27, 2011 Weather.gov > NWS Birmingham, Alabama > Historic Outbreak of April 27, 2011 Current Hazards Current Conditions Radar
https://www.weather.gov/bmx/event_04272011
help
“the EF4 tornado claimed 65 lives and injured another 1,500 along an 80-mile path from Greene County, Alabama, through Tuscaloosa into the northern suburbs of Birmingham.”
INSUFFICIENT EVIDENCE
No evidence was provided in the gathered results to verify the specific death toll, injury count, or path length for the Tuscaloosa-Birmingham tornado.
help
“At the time, this was the costliest tornado in U.S. history ($2.4 billion damage), until the Joplin, Missouri, EF5 tornado less than a month later.”
INSUFFICIENT EVIDENCE
No evidence was provided in the gathered results to verify the $2.4 billion damage figure or the comparison to the Joplin tornado.
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“The parent supercell spawning the Tuscaloosa and west Birmingham EF4 tornadoes on April 27, 2011, was tracked on radar for over seven hours from its formation in Newton County, Mississippi, to Macon County, North Carolina”
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“three fatalities occurred in northwest Kemper County when a strapped down doublewide mobile home was thrown a distance of approximately 300 yards”
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“Cordova, Alabama... Around 5:20 a.m. CDT, a tornado... Damage there was rated EF3”
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“Less than 12 hours later, another long-track tornado approached the city... carving a one-half-mile wide path of damage rated EF3 in the downtown area.”
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“Marshall County, Alabama, was affected 15 separate times by a tornado on April 27, 2011.”
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“An early-morning squall line in the Tennessee Valley on April 27 spawned 76 tornadoes in Mississippi, Alabama, east Tennessee and north Georgia”
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“a second line of thunderstorms later that morning spawned another seven mainly weak EF0 or EF1 tornadoes in northern Alabama.”
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“The individual tornado paths from the April 25-28, 2011, Super Outbreak added up to an almost unfathomable 3,200 path miles”
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“This total path was over 600 miles longer than the April 3-4, 1974, Super Outbreak.”
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“Over 300 transmission towers were mangled on April 27. Two power plants were forced to shut down, including the TVA's Browns Ferry Nuclear Power Plant”
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“A total of 303 tornado warnings were issued by the six most-affected National Weather Service Forecast offices on April 27, 2011, alone.”
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“The NWS-Huntsville, Alabama office issued 90 tornado warnings, alone that day.”
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“The average lead time for tornado warnings April 27 among those six NWS offices was found to be from 20-22 minutes.”
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“One of the four EF5 tornadoes on April 27 raked through Smithville, Mississippi.”
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“An SUV was tossed one-half mile into the town's water tower, then blown another one-quarter mile.”
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“April 27, 2011, was the only day on record with two F/EF5 tornadoes in Mississippi.”
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“They were the first 5-rated tornadoes there since March 3, 1966.”
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“Officially, 207 tornadoes in 15 states were counted on April 27, 2011, a record for any calendar day in the U.S.”
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“This topped the number of tornadoes witnessed on April 3, 1974 (148)”
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“The 20-year average number of U.S. tornadoes in the entire month of April from 2005 through 2024 is 213.”
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“WAFF-TV in Huntsville, Alabama... The radar and radome encasing the radar were blown off and destroyed”
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“Of the 207 tornadoes on April 27, 15 were rated violent tornadoes, either EF4 or EF5”
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“A study by the Centers for Disease Control and the Red Cross found 89.5 percent of the 321 deaths in this outbreak were from these most violent tornadoes.”
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“the average path length of the 15 violent tornadoes was 66 miles.”
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“The Hackleburg/Phil Campbell EF5 tornado was on the ground for 132 miles.”
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“these tornado-spawning thunderstorms were also moving fast, generally in the 45 to 70 mph range”
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“the Super Outbreak and several other tornado outbreaks pushed April 2011's U.S. tornado count to a monthly record of 758”
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“smashing the previous record in any month from May 2003 (542) by over 200 tornadoes.”
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“A photograph from Phil Campbell, Alabama... landed in Lenoir City, Tennessee, some 220 miles away.”
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“A jacket from Hackleburg, Alabama, was found 68 miles away.”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.