Often, but not always, tornadoes form when three different airs masses collide. The first, and probably most important, is a warm, moist air mass from the Gulf of Mexico. Next comes a cool air mass from northern Canada, and finally a dry air mass from the Rockies. When the collision occurs the warm, moist air mass essentially becomes fuel for very strong thunderstorms. Given a few other factors these storms can produce tornadoes.
Tornadoes can form almost anywhere in North America but occur most often on the central plains of the United States.
tornado alley in the Midwest which Texas has the most tornadoes on average
Yes, tornadoes can happen almost anywhere that there are thunderstorms.
No it does not come from tornadoes . :] .....
Yes. Tornadoes form from the clouds of a thunderstorm.
north America form some tribe :P
Yes. It is possible for tornadoes to merge and form a larger tornado, though this is a fairly rare occurrence.
Tornadoes come from thunderstorms, usually, powerful rotating storms called supercells. However, tornadoes can sometimes form with squall lines, hurricanes, and in rare cases, single cell storms.
No. Tornadoes come from thunderstorms, which form in the air. The tornado itself starts forming several thousand feet above the ground.
No. While tornadoes are more common in warm areas, they have been spotted as far north as Alaska.
Nope... tornadoes form from clouds - usually thunderclouds.
Not usually. Most tornadoes form over land.