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The 2011 Super Outbreak was the largest, costliest, and one of the deadliest tornado outbreaks ever recorded, taking place in the Southern, Midwestern, and Northeastern United States from April 25 to 28, 2011, leaving catastrophic destruction in its wake.
Super outbreaks. There have been three tornado outbreaks which scored more than 250 points on the OIS, reaching the status of "super outbreak". [ 1] Historic outbreaks. There have been 43 tornado outbreaks which scored at least 120 points, but less than 249 on the OIS, reaching the status of "historic outbreak". [ 1] Devastating outbreaks.
The 1974 Super Outbreak was the second-largest tornado outbreak on record for a single 24-hour period, just behind the 2011 Super Outbreak. It was also the most violent tornado outbreak ever recorded, with 30 violent (F4 or F5 rated) tornadoes confirmed.
Jul 10, 2024 · Learn about the largest tornado outbreak ever recorded in the United States, which killed at least 340 people and caused billions of dollars in damage in April 2011. Find out how the storms formed, where they hit, and what effects they had on the affected states.
- John P. Rafferty
- A Swarm of Tornadoes
- Almost 200 in One Day
- Tornado Paths Total Thousands of Miles
- Deadliest Since The Great Depression
- Off-The-Chart Parameters
- Three Separate Rounds of Tornadoes in One Day
- The Town Hit Twice
- Watching The Tuscaloosa Tornado Live
- A Supercell's Long Journey
- Tornado Plows A Field
An incredible 349 tornadoes were spawned in just over 72 hours April 25-28, 2011, according to NOAA. While the Deep South – Alabama, Mississippi, Georgia and Tennessee – bore the brunt of it, tornadoes tore through parts of 21 states from Texas to central New York. According to the Iowa Environmental Mesonet, 929 tornado warnings were issued by 44 ...
Officially, 199 tornadoes in 15 states were tallied on April 27, 2011, a record for any calendar day in the U.S. This topped the number of tornadoes witnessed on April 3, 1974 (148), considered the other Super Outbreak. That's basically an entire April's worth of tornadoes in one day; April averaged 194 tornadoes over a 20-year period from 2000 thr...
The individual tornado paths from the April 25-28, 2011, Super Outbreak added up to an almost unfathomable 3,200 miles, by far the most of any U.S. outbreak, according to Greg Forbes, the former severe weather expert at The Weather Channel. This total path was over 600 miles longer than the April 3-4, 1974, Super Outbreak. If one could place these ...
This siege of tornadoes claimed 324 lives, 319 of those on April 27, the deadliest day of tornadoes in the U.S. since March 21, 1932, according to the definitive April 27 outbreak study from Knupp, et al. Of the 199 tornadoes on April 27, 15 were rated violent tornadoes, either EF4 or EF5 on the Enhanced Fujita scale. The Centers for Disease Contro...
The combination of instability – warm, humid air near the surface overlaid by cold, dry air aloft – and wind shear in the atmosphere, particularly at low levels crucial for the spawning of tornadoes, was quite simply in another realm on April 27, 2011. Meteorologist and researcher Jon Davies bloggedabout the rarity of seeing such extreme values of ...
It not uncommon for a morning cluster of severe thunderstorms to be followed by a more dangerous round of afternoon supercells. The morning thunderstorm cluster typically produces damaging winds, flooding rain and perhaps a few tornadoes. An early-morning squall line in the Tennessee Valley on April 27, 2011, produced an incredible 76 tornadoes in ...
Because of these three rounds of severe thunderstorms, some locations were hit multiple times on April 27. Cordova, Alabama, northwest of Birmingham, was just one unfortunate example. Around 5:20 a.m. CDT, a tornado intensified quickly as it tracked into the city of just over 2,000 residents. Damage there was rated EF3 on the Enhanced Fujita scale....
Perhaps the most indelible live coverage of this Super Outbreak was the split-screen shown on ABC 33/40 in Birmingham, Alabama, showing both a live-cam shot of a wedge tornado roaring through Tuscaloosa, Alabama, as meteorologist James Spann was showing the classic hook echo and debris ball (indicating tornado-lofted debris) on radar. In roughly 90...
The term supercellrefers to a rotating thunderstorm that is persistent, on a time scale much longer than a single, ordinary thunderstorm you may see, for instance, in the summer over the Southeast. The Knupp et al. studydocumented three prolific long-track supercells on April 27. One supercell tracked over 500 miles in nine hours and spawned the Co...
The first of four EF5 tornadoeson April 27, 2011, raked through east-central Mississippi, leaving some incredible damage in its wake. Northeast of Philadelphia, Mississippi, a swath of ground was scoured out to a depth of two feet, in some places. The tornado even ripped sections of asphalt from a road. (MORE: NWS Summary, With Photos)
Apr 25, 2017 · Learn about the record-breaking tornado event that struck the southeastern United States in April 2011, killing 321 people and causing $12 billion in damages. Find out how the outbreak challenged decades-old records, affected over a dozen states, and how to prepare for severe weather.
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Apr 3, 2024 · Learn how a deadly weather event that killed 335 people and caused $600 million in damages led to improvements in forecasting and warning systems. Find out how to identify a safe place to shelter during tornadoes and share your #SafePlaceSelfie with NOAA.
