Fetid was a child of the Latin word fetidus, and dates back to the early 15th century, as does its cousin (now in disuse), fetor. Reek, which originally was a verb meaning âto smoke,â took on the connotation of âto smell badâ in the 17th century.
A F4 tornado has a maximum speed of 260mph (418 kph). However it should be noted that the wind estimates of the original Fujita scale, which were meant to correlate with damage levels, have been found to be inaccurate. on the new Enhance Fujita scale the top estimated wind speed for an EF4 tornado is 200 mph.
Starting in 2007, the EF Scale has been used to rate tornadoes. On the original Fujita scale, the damage generated by an F5 tornado corresponded to estimated wind speeds of 262 to 317 mph. However, research has shown that these estimated wind speeds may be over-exaggerated.