The Enhanced Fujita Scale is used to assign tornadoes a rating based on estimated wind speeds and damage.
The EF Scale became operational on Feb. 1, 2007. It was revised from the original Fujita Scale, developed in 1971 by Tetsuya Fujita, to better reflect wind speed with damage observed in tornado surveys.
Deadly Severe Weather Facts & Safety Tips:
A large storm will form over the eastern half of the nation next week and will bring a swath of unsettled conditions for days.
A slow-moving low pressure system will make residents of the Northwest reach for their raincoats and umbrellas each day through the remainder of the week.
Surviving a flight in the wheel well of a commercial aircraft is possible, but highly unlikely due to subzero temperatures and thinner air than what is found at the peak of Mount Everest.
A seemingly never-ending debt cycle has many Americans searching to take matters into their own hands and an innovative Oregon couple may have found a solution that also benefits the environment.
Cooler weather and rain showers will be the resounding theme for Seattle this week.
State College, PA (1996)
75 mph wind gust during a severe thunderstorm.
Rochester, NY (1885)
A high of 90 degrees.
Washington, DC (1960)
91 degrees to 47 degrees in six hours.