Record-breaking stretch since the last EF5 tornado in the US

10 years after devastating EF5 tornado in Moore, Oklahoma

The Last U.S. EF5 Tornado Struck 6 Years Ago And That's the Second-Longest Streak of Its Kind

Explaining the EF scale for tornadoes

There's a big difference between an EF0 and EF5: Understanding tornado ratings - The Weather Network

Classic Movie Review: 'Twister' -

We all love the movie 'Twister,' but is it scientifically accurate?