Literally, in order for a vortex to be classified as a tornado, it must be in contact with the ground and the cloud base. Weather scientists haven't found it so simple in practice, however, to classify and define tornadoes (per this essay by Doswell).
Bikini Island, 2015. Credit: Emlyn Hughes. (Phys.org)âA team of researchers from Columbia University in New York has found that all of the Marshall Islands involved in nuclear tests by the U.S. are now habitable, except for Bikini Atoll.
The southernmost and largest island in the atoll is named Kwajalein Island, which its majority English-speaking residents (about 1000 mostly U.S. civilian personnel) often called by the shortened name, Kwaj /ËkwÉËdÊ/. The total land area of the atoll amounts to just over 6 square miles (16 km2).