This best seems to describe a multiple vortex tornado. This is a tornado that has smaller vortices, called suction vortices, circling inside the main vortex. The development of such a tornado is complicated. Let's start with a single vortex tornado. Contrary to popular belief the strongest winds in a tornado are at the edge of the funnel rather than at the center. However, the lowest pressure in a tornado is at the center. While air mostly moves up in a tornado, in some especially strong ones, the low pressure causes a downdraft to move down the center of the tornado. This is a process called vortex breakdown. When this downdraft reaches ground level the air must move outward, but it soon meets the air flowing into the tornado. This interaction creates and area of very strong convergence where the inflow and outflow meet, and some of the tornado's angular momentum gets converted into smaller vortices within the main circulation.
These suction vortices create looping swaths of more severe damage within the main damage path.
Tornadoes can form in mountains, but most do not.
Hurricanes form over warm ocean water. Tornadoes can form just about anywhere.
Tornadoes can form at any time of day or night. The time from 3 PM to 9 PM is the most common time for tornadoes to form.
No, tornadoes typically form over land in association with thunderstorms. Waterspouts, which are tornadoes that form over water, can occur in tropical oceans under specific conditions, but they are generally much weaker than tornadoes that form over land.
Tornadoes do not form under clear, sunny, or stable weather conditions, of if the weather is too cold. They cannot form without thunderstorms.
Yes, tornadoes can form. Hundreds, even thousands of tornadoes form every year.
Tornadoes can form in mountains, but most do not.
No. Tornadoes form from cumulonimbus clouds.
Antarctica is too cold for tornadoes to form. Tornadoes need energy from warm air.
Yes. Tornadoes form from the clouds of a thunderstorm.
Tornadoes most often form on land, but they can form over water.
No it does not come from tornadoes . :] .....
Tornadoes need thunderstorms to form.
Tornadoes mostly form from cumulonimbus clouds. :D
Tornadoes usually form from a type of thunderstorm called a supercell. Tornadoes themselves are a unique type of windstorm.
While they happen everywhere else, tornadoes are not known to form in Antarctica.
Entirely in updrafts. Tornadoes form in the updraft portion of a thunderstorm.