On Wedesday- April 3 1974- a tornado outbreak began over 13 central and southern U.S. states that continued into the early morning of April 4 produced 148 tornadoes that killed up to 330 people.
On April 27-28 2011- another tornado swarm occurred over only 6 states in the central- southern through eastern U.S. whose numbers of both tornadoes produced and deaths caused could eventually exceed the numbers produced during the 1974 outbreak.
See more images and videos on the original CSW post on this outbreak from Wednesday night- April 27 2011.
As of this post- the death toll is at 318 according to the ASSOCIATED PRESS- but the exact number of tornadoes is still not yet known.
The NEW YORK TIMES published a story that addresses this week's outbreak- focusing on how advances in technology and forecast methods may have kept this outbreak's death toll from being even higher.