The deadliest outbreak since 1974 has ocurred (updated: since 1925). There are some 264 dead in Alabama alone (340 total as of now). Some aerial photos from MSNBC of the Tuscaloosa tornado’s path, as the damage is consistent with an EF4-EF5. Another youtube video here. CNN has a doppler radar image of the debris in the funnel, some debris traveling perhaps as high as 7,000 to 8,000 feet. The WaPo has more here, with a map indicating each reported tornado in the outbreak.