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:
Comments that don't add to the conversation may be automatically or manually removed by Facebook or AccuWeather. Profanity, personal attacks, and spam will not be tolerated.
Despite Tuesday, March 20 marking the first day of spring, it certainly will not feel like it to those in the mid-Atlantic, where a quick-hitting snow event is expected.
A spell of unseasonable warmth in Germany will be replaced by arctic cold through Sunday as the “Beast from the East” returns.
Lives and property will be in severe danger across northern and eastern Madagascar as a potent tropical cyclone unloads torrential rain through Sunday night.
As a second storm in three days pushes east of the Rockies, locally severe storms may erupt over parts of the south-central United States into Sunday night.
Conditions are ideal for wildfire ignition and rapid spread over the southern Plains into Friday night.
This weekend will bring a great opportunity for stargazers to see the zodiacal light, an eerie glow near the horizon which is only visible around the equinox.
The St. Patrick's Day Parade in Boston will go on and so will winter for this year's festivities.