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Case study

Hallam, Nebraska 22 May, 2004 Brian Smith National Weather Service Valley, NE. Case study. Tornado damage path. Aerial Photo over Hallam. 1. 4. 2. 5. 3. One or Two Family Residence: (FR12, DI2). DODs 1 2 3 4 5 6 7 8 9 10. Return to the aerial photo.

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Case study

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  1. Hallam, Nebraska 22 May, 2004 Brian Smith National Weather Service Valley, NE Case study

  2. Tornado damage path

  3. Aerial Photo over Hallam. 1 4 2 5 3

  4. One or Two Family Residence: (FR12, DI2) • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 Return to the aerial photo

  5. Metal Building System (MBS/DI21) • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 Return to the aerial photo

  6. One or Two Family Residence (FR12, DI2) Return to the aerial photo

  7. One or Two Family Residence (FR12, DI2) • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 Return to the aerial photo

  8. One or Two Family Residences (FR12, DI2) Return to the aerial photo

  9. One or Two Family Residences (FR12, DI2)You make the call. • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 Return to the aerial photo

  10. youmakethecall-FR12-1

  11. One or Two Family Residences (FR12, DI2) • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 Return to the aerial photo

  12. Hardwood Trees (TH, DI27) Return to the aerial photo

  13. Hardwood Trees (TH, DI27) • DODs • 1 • 2 • 3 • 4 • 5 Return to the aerial photo

  14. You make the call • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 Damage Indicator Return to the aerial photo

  15. You make the call MHSW

  16. Manufactured Home Single Wide • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 Mobile Home Frame Return to the aerial photo

  17. One or Two Family Residences (FR12, DI2)

  18. Closeup of the Home • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 Return to the aerial photo

  19. Track over the Norris School Norris School

  20. Junior or Senior High School (JHSH, DI16) Roof off classrooms Large Span Roofs Collapsed

  21. Junior or Senior High School(JHSH, DI16) • DODs • 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11

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

  23. Storms Prediction Center EF-Scale Website: http://www.spc.noaa.gov/efscale Texas Tech Wind Science Engineering Center: http://www.depts.ttu.edu/nwi/Pubs/FScale/EFScale.pdf A Guide to F-Scale Damage Assessment http://www.wdtb.noaa.gov/courses/EF-scale/lesson2/FinalNWSF-scaleAssessmentGuide.pdf Additional Information

  24. If you have any questions about this lesson, contact Jim LaDue, James.G.LaDue@noaa.gov Contacts

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