There is no front; tornadoes form for a variety of complex reasons, but usually in the most dynamic part of a cyclone before the cold front but after the warm front. They require plenty of moisture as well as instability and wind shear throughout the troposphere.
Stationary Front
Warm climates .
stationary
a warm front
cold front
Stationary Front
Warm climates .
The cloud that forms the visible part of a tornado is called a funnel cloud.
When a tornado forms it often produces a funnel cloud.
Fast air. Really, really fast air.
stationary
stationary
It is a tornado and a hurricane
Tornadoes are spawned by cumulonimbus clouds, which are multi-level clouds.
a tornado is formed by a thunderstorm
No one really know pressure can vary for the type or category of a tornado.
Not exactly. A tornado itself is a violently rotating windstorm that usually creates a condensation funnel, but a tornado can develop without a funnel.