A team of surveyors from the Norman, Oklahoma, National Weather Center and two private companies performed a detailed survey (all objects/structures) of the tornado to provide better documentation than is normally done, in part to aid future studies of the event. The tornado killed 24 people, injured over 200 others, and damaged many structures. It traveled 23 km and damage was up to 1.7 km wide.
The tornado that affected Moore, Oklahoma, and the surrounding area on was an extreme event.
(c) large propane tank moved 900 m from Orr Family Farm to Westmoor neighborhood east of Briarwood Elementary School (inset: tank cradle at Orr Family Farm) (d) one of the destroyed classroom buildings at Briarwood Elementary School (e) aerial view of PTES and surrounding neighborhoods (note houses with slabs swept clean south of the school) (f) aerial view of MMC and surrounding area, blue arrows mark movement of vehicles from MMC parking lot and debris trajectories west of Telephone Rd., blue dashed lines mark selected vehicles (g) EF5-rated house, based on use of proper anchor bolts, nuts, and washers (note bent anchor bolts) to attach bottom plate to foundation and (h) EF4-rated house, based on use of nails to attach bottom plate to foundation (note no appreciable penetration of cut nails into concrete foundation). Damage images: (a) old Interstate-44 bridge with two sections downed (note no apparent damage to new Interstate-44 bridge to the left of the old bridge) (b) oil storage tank moved 2.1 km from tank farm near S.
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