Monday's powerful tornado in suburban Oklahoma City loosely followed the path of a killer twister that slammed the region in May 1999.
Witnesses give a first-hand account of the tornado that ripped through the Moore, Okla., area on May 20, 2013.
This is the longest the U.S. has gone into May without registering an EF1 or stronger tornado, which are the types that can cause damage.
For the second day in a row, powerful storms are tearing across portions of the Great Plains.
Photos: OKC suburbs ravaged by tornado 
A monstrous tornado as much as a mile wide roared through the Oklahoma City suburbs on May 20, 2013, flattening entire neighborhoods.
DEVELOPING: State medical examiner's office: 37 killed in Oklahoma tornado; death toll expected to rise.
A monstrous tornado as much as a mile wide with winds up to 200 mph roared through the Oklahoma City suburbs Monday.
Several tornadoes struck parts of the nation's midsection, concentrating damage in central Oklahoma and Wichita, Kan.
