Greg Forbes //Aug. 17, 2011 // 1:55 PM
The May 22, 2011 EF-5 tornado wiped out a third of Joplin, Mo. as it traveled across 13 miles in 20 minutes. It destroyed four schools and damaged another five with winds estimated at over 200 mph and a debris field that rose up 18,000 feet into the sky.
In the video below, The Weather Channel's Dr. Greg Forbes explains what was so extraordinary about the May 22, 2011 tornado that wiped out a third of Joplin, Mo.
All statements and opinions expressed on this blog are those of the individual contributors, and not of the Bill & Melinda Gates Foundation or NBC News.
