City of Joplin Tornado Fact Sheet (PDF)
National Weather Service Report: Joplin Tornado
NewsELA: Company Designs Tornado Safe Rooms for Schools (5/22/2013)
NewsELA: What is a Tornado? (2/09/2017)
TedED VIDEO: How to Track a Tornado (6 mins)
TedED VIDEO: How Tornados Form (4 mins)