Antarctica has never had a tornado.
However tornadoes have been observed on every other continent except Antarctica.
Tornadoes can occur and develop anywhere on Earth when the atmospheric conditions are just right.
However because Antarctica has a really cold climate and also because of the sun angle in Antarctica it makes it unlikely for tornadoes to form in Antarctica.
Tornadoes form when 2 weather fronts conflict with each other and cause instability in the atmosphere.
The instability in the atmosphere from the 2 weather fronts conflicting can result in changes in wind speed and direction and the formation of a vortex.
The United States and Canada are the most tornado prone countries and have had the most recorded tornadoes.
Other tornado prone areas are Western Mediterranean, Western Canada, South Africa, New Zealand, Japan, Eastern India, Bangladesh, Australia and Argentina.
The United States is the country that experiences the most tornadoes and more than 1,000 tornadoes per year have been reported in the United States every year since 1990.
The high count of twisters and tornadoes in the United States results mostly from the United States topography, which has a large central core with relatively flat terrain.