Abstract
An EF-5 tornado occurred on May 22, 2011, in the populated area of Joplin, Missouri, causing 161 fatalities and over 1000 injuries. A conceptual model of protective action decision making was developed based on interviews with Joplin tornado survivors to further understand the factors that influenced decision making and sheltering behavior in the 2011 storm. The model showed that the majority of survivors decided at some point before the tornado hit that the act of seeking protection was not necessary, primarily due to a lack of tornado-related physical cues; previous experiences with tornadoes via false alarms; confusing and/or inconsistent emergency communication regarding the tornado; and/or tornado beliefs about Joplin’s geography. These individuals took action to protect themselves after witnessing audible or visual cues signaling imminent danger to them. Since this work was completed, efforts have been underway to translate this research from theory to practice. Namely, the findings from this work have been developed into guidance for communities on alerting for tornadoes, including the development of message templates and decision-making tools to improve methods for communicating with populations under imminent threat of tornadoes and other wind storm events.
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Notes
The NWS defines a false alarm as an unverified tornado warning. In other words, a tornado warning polygon for which no visual reports or damage indicators demonstrate that a tornado occurred during the valid time period of the warning.
10 percent of the survivor interviews were conducted with managers and employees of local businesses and institutions, 10 percent provided information regarding individuals who died from the storm, and 10 percent of interviewees were among the injured.
For the interviews performed to understand the pattern, location, and causes of deaths, the same interview guide and questions were used during the interviews with friends/families of victims, however, were asked (to the extent possible) of the interviewee about the person who died.
All percentages included in Fig. 3 are associated with the 140 people in the sample (as the denominator for the percentage).
It is important to note that Joplin residents had limited access to underground or tornado–resistant shelters. There were no community shelters or safe rooms in the City of Joplin or Jasper County at the time of the May 22, 2011, Joplin tornado. Also, 82 percent of the homes in Joplin lacked basements. Only a few non–residential buildings were equipped with underground locations (e.g., basements), and none was identified as having a tornado–resistant shelter above ground.
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Acknowledgements
The author would like to thank Jennifer Spinney (University of Western Ontario, Department of Anthropology) who was on contract to collect the field data for this study. The author would also like to thank the many survivors of Joplin, MO, whose stories she will carry with her always. The author is grateful to Emily Walpole, Jiann Yang, and Nelson Bryner from NIST, Frank Lombardo from the University of Illinois at Urbana-Champaign, and Jeannette Sutton from the University of Kentucky for their insights on this article (pre-submission). The author also thanks NIST for permission to use text, and NIST and GeoEye/MJ Harden Aerial Imagery for permission to use figures from NIST’s Final Report NCSTAR 3 (Kuligowski et al. 2014). Finally, thank you also to Long Phan, Marc Levitan, Frank Lombardo, and David Jorgensen, co-authors on NIST’s final report of the Technical Investigation of the Joplin, MO tornado, and the peer (blind) reviewers who provided insightful comments on this article.
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Kuligowski, E.D. Field research to application: a study of human response to the 2011, Joplin tornado and its impact on alerts and warnings in the USA. Nat Hazards 102, 1057–1076 (2020). https://doi.org/10.1007/s11069-020-03945-6
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DOI: https://doi.org/10.1007/s11069-020-03945-6