Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE.

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Presentation transcript:

Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE

Aerial Photo over Hallam

One or Two Family Residence DODs Return to the aerial photo

Metal Building System DODs Return to the aerial photo

Manufactured Home Single Wide DODs Mobile Home Frame Return to the aerial photo

One or Two Family Residence

DODs Return to the aerial photo

Hardwood Trees

DODs Return to the aerial photo

One or Two Family Residences

DODs Return to the aerial photo

One or Two Family Residences

Closeup of the Home DODs

Norris School

Junior or Senior High School Roof off classrooms Large Span Roofs Collapsed

Junior or Senior High School DODs

Summary Case Study of the Tornado that struck Hallam, Nebraska on May 22, 2004 Identify the Appropriate Damage Indicator Assess the Degree of Damage Assign a final EF Scale Rating (EF4) Identify Construction Quality variances and adjust DOD or wind speeds accordingly

Additional Information Storms Prediction Center EF-Scale Website: Texas Tech Wind Science Engineering Center: