Oklahoma tornado stronger than Hiroshima atomic bomb

A precise combination of wind, humidity and precipitation triggered a deadly tornado in Oklahoma on Monday. The twister which left at least 24 dead, including nine children, and some 237 injured. The impressive amount of energy dissipated is now believed to be much greater than the atomic bomb that destroyed the Japanese city of Hiroshima on 6 August 1945. NASA released also a video showing the killing twister from space (see footage below)

EF-5 tornado Moore Oklahoma

Total damage: aerial views of what’s left behind after an EF-5 twister hit Oklahoma on May 20, 2013 (Wikimedia CC0)

The National Weather Service has assigned the tornado a top scale EF-5 rating, which is the highest for the wind speed and severity of the damage. The speed of the wind gusts was estimated at 320 km/h and 337 km/h.

Several meteorologists took real time measurement data used to calculate the amount of energy dissipated during the storm. After a detailed analysis, the tornado strength was estimated to have been between 8 to 600 times greater than the power released by the Hiroshima bomb, with most experts opting for higher values.

At some points, the tornado was 2 kilometers wide and 27 kilometer long for approximately 40 minutes. This period is quite long for a typical tornado, but it is not unusual for a violent one, said the meteorologist researcher Harold Brooks of the National Severe Storms Laboratory. Of the 60 EF5 tornadoes since 1950, Oklahoma and Alabama have been hit the most, 7 times each. More than half of these top-of-the-scale tornadoes are in just 5 states: Oklahoma, Alabama, Kansas, Texas and Iowa. Only less than 1 percent of all U .S. tornadoes show such a violent behavior – that means about 10 a year, added Brooks. In general the United States averages about one EF-5 a year, but this was the first in about 2 years.

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Moore Oklahoma tornado

View of the supercell thunderstorm that spawned a deadly tornado that passed just south of Oklahoma City and swept Moore ( NASA/Jeff Schmaltz)


Moore medical center tornado damage

Norman Regional Hospital (Moore Medical Center) was reduced to rubble as it was directly in the path of the massive tornado (Wikimedia CC0)

Video: EF-5 Oklahoma tornado

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