rate tornadoes based on damage after rating hit the green flag EF0- 65mph-85mph, Minor damage to structures, doors and windows blown out, trees have large branches snapped off EF1- 86mph-110mph, Doors and garage doors blown in, siding ripped off houses, decks uplifted, and structure roofs lose significant amount of covering EF2- 111mph-135mph, Serious damage to well-built structures, weak strucutres, like barns or mobile homes, are swept away, trees are snapped and cars are tossed EF3- 136mph-165mph, Walls are torn off well-built structures, weak structures are completely destroyed or swept away, vehicles tossed less than 45 meters EF4- 166mph-200mph, Well-built structures are destroyed or swept away, trees are flattened, EF4 contextual include, partial debris granulation, Vehicles tossed 50-300 yards EF5- 201+mph, Well-Built/Anchor-bolted Homes and Businesses are swept away, Numerous trees are flattened, steel reinforced structures are compromised EF5 contextual include, ground scouring, vegetation debarked, debris disintegrated, roads scoured and vehicles tossed 300+ yards A typical tornado moves 10-30 miles per hour, anything lower then 10 would be considered slow, anything higher than 30 would be considered fast
SBO= Small barns and outbuildings FR12= One to Two Story Family Homes MHSW= Mobile homes MHDW = Double wide Mobile home ACT= Apartments, Condominiums and Townhouses M= Motels MAM = Masonry Apartments or Motels SRB = Small Retail Buildings SPB = Small Professional Building SM = Strip Mall LSM = Large Shopping Mall LIRB = Large Isolated Retail Building ASR = Automobile Show Room ASB = Automobile Service Building ES = Elementary School JHSH = Junior High or Senior High LRB = Low rise building(1-4 stories) MROB = (Mid rise Building (5-20 stories) HROB = High Rise Building (21+ Stories) IB = Institutional Building (Hospitals, Courthouses, Universities, etc) MBS = Metal Building System SSC = Service Station Canopy WHB = Warehouse ETL = Electrical Transmission Line FST = Free-Standing Tower(Cell phone towers, Microwave towers) FSP = Free Standing poles(Flag poles, Street Lights) LB = Lower Bound/weaker construction, Structure has numerous weak points, such as flaws in the construction itself, not secured to it's foundation, is poorly secured, or has prior damage to frames or foundation. EXP = Expected construction, Structure fits the typical construction the structure would have, structure may or not have minor structural flaws preventing a higher rating. Structure is secured with nails or anchor-bolts UB = Upper bound/Exceptional construction, Structure exceeds normal structure expectations, has no structure flaws what so ever, Structure is secured with strong anchor-bolts
