Tornado Trivia:
-Some 800 tornadoes strike the United States every year.-They create Earth's fastest winds, sometimes exceeding 300 mph.
-Usually travel to the northeast occur most frequently in the U.S. between 4 and 6 p.m.
-Average 5 to 10 minutes on the ground.
-Can stand still or move forward at 70 mph.
-Can be up to a mile wide at ground level.
-In southern states like Arkansas and Missouri, the peak of tornado season is March through May, while in the northern states, like Iowa and Illinois, more tornadoes occur in the late spring and summer.
-F-scale ~ In the early 1970s, T. Theodore Fujita developed a damage scale for high-wind events including tornadoes. More recently a new and updated scale, known as the EF (Enhanced Fujita) scale has been used as the standard for tornado damage measurements.
The EF-scale, which goes from EF0 to EF5, is the only widely used tornado rating method. Although wind speeds are given for different EF-scale ratings, these are only estimates, as it is very hard to get reliable measurements near a twister. Violent tornadoes – EF4 and above – are less than one percent of all tornadoes, but account for 70 percent of tornado-related deaths. Some of these twisters can last more than an hour and travel hundreds of miles. Almost 90 percent of tornadoes are weak – EF0 or EF1 – lasting usually less than 10 minutes and causing less than five percent of tornado-related deaths.
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