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An EF5 rating on the new scale requires a higher standard of construction in houses than does an F5 rating on the old scale. So, the complete destruction and sweeping away of a typical American frame home, which would likely be rated F5 on the Fujita scale, would be rated EF4 or lower on the Enhanced Fujita scale.
EF0: 65-85 mph. EF1: 86-110 mph. EF2: 111-135 mph ... EF5: Over 200 mph. EF5 tornadoes in Oklahoma. Since 1905, NWS has tracked 13 EF5 tornadoes in Oklahoma, including the devastating 2013 Moore ...
Tornadoes are ranked from EF0 to EF5. The scale is divided into six categories: F0: Gale; 65 to 85 mph. F1: Weak; 86 to 110 mph. F2: Strong; 111 to 135 mph. F3: Severe; 136 to 165 mph.
Despite their relative rarity, the damage caused by EF5 tornadoes represents a disproportionate hazard to life and limb; since 1950 in the United States, only 59 tornadoes (0.1% of all reports) have been designated F5 or EF5, and yet these have been responsible for more than 1300 deaths and 14,000 injuries (21.5 and 13.6%, respectively).
The Fujita scale was applied retroactively to tornadoes reported between 1950 and the adoption of the scale in the National Oceanic and Atmospheric Administration (NOAA) National Tornado Database. Fujita rated tornadoes from 1916 to 1992 [ 4 ] [ 5 ] and Tom Grazulis of The Tornado Project retroactively rated all known significant tornadoes (F2 ...
There are six categories used by the National Weather Service to classify the rotational speed of tornadoes (EF0-EF5) but just two levels to warn of tornado activity.
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