Intensity Wind speed Damage type EF-0 65-85 mph Light. Roof shingles lost, gutters ripped off, tree branches broken. EF-1 86-110 mph Moderate. Roofs stripped, mobile homes overturned. EF-2 111-135 mph Considerable. Homes shifted on foundations, mobile home destroyed, large trees snapped, cars lifted. EF-3 136-165 mph Severe. Homes’ second stories destroyed, large buildings badly damaged, cars tossed. EF-4 166-200 mph Devastating. Homes leveled, cars thrown, small penetrating missiles generated. EF-5 200+ mph Incredible. Houses swept away, cars thrown hundreds of feet, high rises structurally deformed.[2] The deadliest tornado listed here claimed the lives of nine elementary school students in Newburgh, Orange County in November 1989. Their deaths are officially attributed to the collapse of a school wall as the tornado struck the school, but many experts argued the collapse was due to a strong downburst, not tornadic winds. [3] Prior to 1996, the National Weather Service assigned a dollar range when it estimated property damage from a tornado. An entry of “0” means no estimate was provided. [4] When more than one county is listed, the first is the county where the tornado initially touched down. The others are in order of the tornado’s progression.