Please review the assessment of the 2011 Joplin tornado from the NWS Service Assessments.
Preface
On May 22, 2011, one of the deadliest tornadoes in United States history struck Joplin,
Missouri, directly killing 158 people and injuring over 1,000. The tornado, rated EF-5 on the
Enhanced Fujita Scale, with maximum winds over 200 mph, affected a significant part of a city
with a population of more than 50,000 and a population density near 1,500 people per square
mile. As a result, the Joplin tornado was the first single tornado in the United States to result in
over 100 fatalities since the Flint, Michigan, tornado of June 8, 1953.
Because of the rarity and historical significance of this event, a regional Service Assessment
team was formed to examine warning and forecast services provided by the National Weather
Service. Furthermore, because of the large number of fatalities that resulted from a warned
tornado event, this Service Assessment will provide additional focus on dissemination,
preparedness, and warning response within the community as they relate to NWS services.
Service Assessments provide a valuable contribution to ongoing efforts by the National Weather
Service to improve the quality, timeliness, and value of our products and services. Findings and
recommendations from this assessment will improve techniques, products, services, and
information provided to our partners and the American public.
Lynn P. Maximuk
Director, Central Region
National Weather Service
July 2011