A small but very intense vortex within a tornado circulation. Several suction vortices typically are present in a multiple-vortex tornado . Much of the extreme damage associated with violent tornadoes (F4 and F5 on the Fujita scale ) is attributed to suction vortices.
SUCTION VORTEX (SOMETIMES SUCTION SPOT)
Meaning of SUCTION VORTEX (SOMETIMES SUCTION SPOT) in English
A comprehensive English glossary of weather. Полный английский глоссарий погоды. 2012