There were several major tornado outbreaks in the US in April 2011, but you are most likely referring to the catastrophic outbreak of April 25-28 with most of the damage on April 27. Reliable sources are hard to come by. One article states that approximately 6,200 homes were destroyed in Alabama alone. Alabama suffered about $4.3 billion of the approximately $4.8 billion in damage from the outbreak. If we assume all of these figures are accurate and that the ratio of cost to homes destroyed remains about the same, then we can arrive at a very rough estimate of about 6,900 homes destroyed.
A number of towns were at least partially destroyed by tornadoes during the Super Outbreak. Tanner, Alabama was hit especially hard as it got hit be 2 tornadoes; 1 F5 and 1 F4 in just 30 minutes.
10 people died on April 24, 2010 from a tornado in Mississippi.
The most tornadoes recorded in a single outbreak is 219 on April 27, 2011, during the Super Outbreak in the United States. This outbreak affected several states in the southern and eastern U.S., resulting in widespread devastation and loss of life.
The red river tornado outbreak was a severe weather event that produced 58 tornadoes on April 10 and 11, 1979 across parts of the Great Plains and Tennessee and Ohio Valleys, killing 58 people. The worst of these tornadoes was the massive F4 tornado that struck Wichita Falls, Texas, killing 42 people and injuring over 1,700. Adjusting for inflation, it was the costliest tornado in U.S. history until the Oklahoma City tornado of 1999.
That would be the tornado that destroyed the town of Sneed, Arkansas on April 10, 1929. It is the only known F5 tornado to have hit Arkansas.
A number of towns were at least partially destroyed by tornadoes during the Super Outbreak. Tanner, Alabama was hit especially hard as it got hit be 2 tornadoes; 1 F5 and 1 F4 in just 30 minutes.
There were 325 tornadic fatalities from the April 25-28 2011 tornado outbreak of which 320 were on April 27.
The largest tornado outbreak on record lasted from April 25 to 28 of 2011 with 351 tornadoes. This outbreak also set a 1 day record on April 27 when 208 tornadoes touched down.
There is concern for a major tornado outbreak on April 5, but it is highly unlikely that it will be as severe as the outbreak in late April 2011. Outbreaks such as that happen only happen a few times in a century.
April 3-4 1974
The Super Tornado Outbreak occurred on April 3-4 1974.
If you mean April 2011 the title for the largest tornado is a tie between an EF3 near Pocahontas, Iowa on April 9 that destroyed a few farms and the EF4 that devastated Tuscaloosa, Alabama on April 27. Both tornadoes were 1.5 miles wide.
It was definitely worse than the April 22-25, 2010 tornado outbreak. That outbreak resulted in 12 deaths, of which 10 were from tornadoes (one tornado actually). Preliminary reports indicate that the March 2, 2012 tornado outbreak killed at least 40 people. Hundreds are said to be injured. Damage is estimated at $1.5 billion. This outbreak is probably one of the worst outbreaks of recent history. The severity is comparable to the Super Tuesday outbreak of February 2008.
That depends on which tornado record you are referring to. Here are a few records:Largest tornado: the El Reno, Oklahoma tornado of May 31, 2013 (2.6 miles wide)Longest lived tornado: the Tri-State tornado of March 18, 1925 (3 hours, 29 minutes)Longest damage path: the Tri-State tornado of March 18, 1925 (219 miles)Costliest tornado: the Joplin, Missouri tornado of May 22, 2011 ($2.8 billion)Deadliest tornado: The Daulatpur-Saturia, Bangladesh tornado of April 26, 1989 (1,300 dead)Fastest winds: the Oklahoma City tornado of May 3, 1999 (302 mph)Largest tornado outbreak: the Super Outbreak April 25-28, 2011 (351 tornadoes)Costliest tornado outbreak: the Super Outbreak April 25-28, 2011 (~ $5 billion)Most tornadoes in 24 hours: April 27, 2011 (208 tornadoes)Most violent tornadoes in an outbreak: the Super Outbreak of April 3-4, 1974 (24 F4, 6 F5)
The outbreak killed 348 people of whom 324 died in tornadoes.
On April 26, 1991, Kansas and Oklahoma had a tornado outbreak that killed 23 people.
The expected tornado outbreak for April 26-29, 2014 has a good chance of being significant, but it is quite unlikely that it will be another super outbreak. Outbreaks of that magnitude generally occur at intervals of several decades.