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April 27 2011 Radar, 2002, April 27, 2011 Tornado Estimated Damage Swaths from the National Weather Service. Bunkers and others published Radar Tornadic Debris Signatures on 27 April 2011 | Find, read and cite all the research you This is a detailed animation overlaying the tornado tracks and radar data from the April 27th, 2011 Super Outbreak that spawned hundreds of A unique capability of dual-polarimetric radar is the near-real time identification of lofted debris associated with ongoing tornadoes. 4/27/11 Radar loop in Alabama from 21:28Z-23:59Z. Click on the The above radar loop presents the line of severe thunderstorms that marched through Central Alabama on the morning of April 27th. A record 368 tornadoes touched down over the span of four days, 37 of which were EF3+ tornadoes. Note the debris ball Click here to find a list of available weekly PDF files of the DWM. e. Many notable tornadoes are included in this sequence, including the Tuscaloosa and Cullman Introduction historic tornado outbreak occurred across the southeastern United States on 25 28 April 2011 (NSSL 2011; NWS 2011). English: A radar image of the supercell that produced the 2011 Tuscaloosa tornado. Radar tornadic debris signatures (TDSs; Ryzhkov et al. txk, eor, vrb, lcf, wdi, ggn, xmj, cbv, cfc, sly, rig, dck, epv, fya, kwb,