Is Anywhere Safe in a Tornado? Why researchers pummel storm shelters with 15-foot-long planks at 100 mph.
May 22, 2013
Slate.com - While there are several recorded instances of powerful storms ripping open the doors to storm cellars and other shelters, no such instance has been documented with a shelter tested and approved by the National Wind Institute (NWI) at Texas Tech University. While other storm shelters may be old or poorly designed in the first place, the shelters approved by the NWI are designed to withstand winds up to 250 mph, which includes nearly all recorded tornadoes (including Monday’s) and most tornadoes rated as EF5s on the Enhanced Fujita scale.
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