module 2 case study 2 ef4 strong tornado case hallam, nebraska brian e. smith national weather...
TRANSCRIPT
![Page 1: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/1.jpg)
Module 2Case study 2
EF4 Strong Tornado Case
Hallam, Nebraska
Brian E. Smith
National Weather Service
Valley, NE
![Page 2: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/2.jpg)
![Page 3: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/3.jpg)
Aerial Photo over
Hallam.
11
22
33
4 4
5 5
![Page 4: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/4.jpg)
One or Two Family Residence• DODs• 1• 2• 3• 4• 5• 6• 7• 8• 9• 10
Return to the aerial photo
![Page 5: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/5.jpg)
Metal Building System• DODs• 1• 2• 3• 4• 5• 6• 7• 8
Return to the aerial photo
![Page 6: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/6.jpg)
Manufactured Home Single Wide
• DODs• 1• 2• 3• 4• 5• 6• 7• 8• 9
Mobile Home FrameMobile Home Frame
Return to the aerial photo
![Page 7: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/7.jpg)
One or Two Family Residence
![Page 8: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/8.jpg)
One or Two Family Residence• DODs• 1• 2• 3• 4• 5• 6• 7• 8• 9• 10
Return to the aerial photo
![Page 9: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/9.jpg)
Hardwood Trees
![Page 10: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/10.jpg)
Hardwood Trees
• DODs
• 1
• 2
• 3
• 4
• 5
Return to the aerial photo
![Page 11: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/11.jpg)
One or Two Family Residences
![Page 12: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/12.jpg)
One or Two Family Residences
• DODs• 1• 2• 3• 4• 5• 6• 7• 8• 9• 10
Return to the aerial photo
![Page 13: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/13.jpg)
One or Two Family Residences
![Page 14: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/14.jpg)
Closeup of the Home• DODs• 1• 2• 3• 4• 5• 6• 7• 8• 9• 10
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Norris School
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Junior or Senior High School
Roof off classrooms
Large Span Roofs Collapsed
![Page 17: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/17.jpg)
Junior or Senior High School
• DODs• 1• 2• 3• 4• 5• 6• 7• 8• 9• 10• 11
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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
![Page 19: Module 2 Case study 2 EF4 Strong Tornado Case Hallam, Nebraska Brian E. Smith National Weather Service Valley, NE](https://reader036.vdocuments.site/reader036/viewer/2022062422/56649e7b5503460f94b7c56a/html5/thumbnails/19.jpg)
Additional Information
• Storms Prediction Center EF-Scale Website: www.spc.noaa.gov/efscale
• Texas Tech Wind Science Engineering Center: www.wind.ttu.edu/EFScale.pdf