During the period May 4-10, 2003, an unprecedented number of tornadoes affected the central & southern U.S. During this period, 393 tornadoes occurred across the central & southern U.S. resulting in 39 deaths across 4 states. Six of these tornadoes were classified as violent (F4) on the Fujita Tornado Intensity Scale. Due to the magnitude of this event, a service assessment team was formed by the Nat. Weather Service to examine the warning & forecast services provided to emergency managers, gov't. agencies & the public. Chapters: Service Assessment Team; Service Assessment Report; Best Practices; Fujita Tornado Intensity Scale; Direct Fatalities in Each WFO's CWA; & Event Statistics, May 4-10, 2003. Illustrations.Kelly, John J., Jr. is the author of 'Record Tornado Outbreaks of May 4-10, 2003 National Weather Service Assessment', published 2003 under ISBN 9780756745363 and ISBN 0756745365.