13 - RESOLUTION ADOPTING THE 2017 LAMAR COUNTY MITIGATION PLAN

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Lamar County Multi- Jurisdictional Hazard Mitigation Plan Chapter Three Tornadoes that occur in areas of low development cause little to no damage, conversely, tornadoes which drop in heavily populated areas can cause extreme loss of property and loss of human life. Winds of such velocity can lift even the most solidly built structure. Mature trees can be uprooted and flung across fields or into homes or businesses. Cars and automobiles can be lifted and projected into other structures. Smaller projectiles made of glass shards, splintered lumber, or metal have been documented to pierce trees, homes, and other property. Death can result from any debris source at this speed. The most severe impact by a tornado would be the result of an EF4 or EF5 tornado moving through the county and hitting several communities. 55 Enhanced Fu'ita Scale Fu'ita Scale Potential Damage Ratin Ratin Wind Wind Description 40 -72 65 -85 Light F0 mph EFO mph Tree branches are broken and shallow- rooted trees are toppled. Moderate F1 73 -112 EF1 86 -110 Roof surfaces are peeled off, windows are broken, some tree trunks mph mph are snapped, and unanchored mobile homes or outbuildings overturned. Considerable 112- 111 - F2 157 EF2 135 Roof structures are damaged, mobile homes are destroyed, debris mph mph becomes airborne (missiles are generated); large trees are snapped or uprooted Severe 158- 136 - F3 206 EF3 165 Roof and walls are torn from structures, some small buildings are mph mph destroyed, non - reinforced masonry buildings are destroyed, and trees are uprooted. Devastating 207- 166 - F4 260 EF4 200 Well- constructed houses are destroyed, some structures arer lifted mph mph from fondations and blown some distance, cars are blown some distance, and large debris becomes airborne. 11 • Tornadoes that occur in areas of low development cause little to no damage, conversely, tornadoes which drop in heavily populated areas can cause extreme loss of property and loss of human life. Winds of such velocity can lift even the most solidly built structure. Mature trees can be uprooted and flung across fields or into homes or businesses. Cars and automobiles can be lifted and projected into other structures. Smaller projectiles made of glass shards, splintered lumber, or metal have been documented to pierce trees, homes, and other property. Death can result from any debris source at this speed. The most severe impact by a tornado would be the result of an EF4 or EF5 tornado moving through the county and hitting several communities. 55