Katrina was responsible for $125 billion in damage and 1,245–1,836 fatalities. These ranked it as the costliest natural disaster in United States' history and the deadliest since a hurricane in 1928. Small-scale, transient supercells embedded within the outer bands of the hurricane produced numerous tornadoes throughout its path. Unlike supercells over the Great Plains, these storms last no more than a few hours and are often training. Most of the tornadoes occurred in the hurricane's right-front quadrant, where strong low-level wind shear, high moisture content, and low convective available potential energy combined to produce locally favorable tornadic conditions. A study in 2008 conducted through the American Geophysical Union found that the majority of Katrina-related supercells developed inland over the Gulf Coast rather than offshore, a finding contrary to multiple studies of prior tropical cyclones. Daily statistics List of tornadoes See also Hurricane Katrina effects by region List of North American tornadoes and tornado outbreaks List of tornadoes spawned by tropical cyclones Meteorological history of Hurricane Katrina Notes References External links Storm Storm summary by NWS Jackson, Mississippi Tornado outbreak summary for Georgia by NWS Peachtree City, Georgia Tornado F2 tornadoes Tornadoes of 2005 Tornadoes in Alabama Tornadoes in Florida Tornadoes in Georgia (U.S. state) Tornadoes in Mississippi Tornadoes in North Carolina Tornadoes in Ohio Tornadoes in Pennsylvania Tornadoes in Virginia August 2005 events in the United States Katrina tornado outbreak