The National Weather Service said the tornado that hit Moore, Oklahoma was a top-of-the-scale EF-5 twister with winds of at least 200 mph (322 kph), AP reported. 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. The weather service says the tornado's path was 17 miles (27 kilometers) long and 1.3 miles (2 kilometers) wide. Pirtle says Monday's twister is the first EF-5 tornado of 2013.
