Oklahoma twister a top-of-the-scale EF-5

http://bigstory.ap.org/article/oklahoma-twister-top-scale-ef-5

The National Weather Service says the tornado that hit Moore, Okla., was a top-of-the-scale EF-5 twister with winds of at least 200 mph.

Spokeswoman Keli Pirtle said Tuesday the agency upgraded the tornado from an EF-4 on the enhanced Fujita scale to an EF-5 based on what a damage assessment team saw on the ground. The weather service uses the word "incredible" to describe the power of EF-5 storms.