While air is normally invisible, two different things make tornadoes visible.
The visible funnel is formed by condensation. Because of the low pressure, air that is pulled into a tornado is decompressed and cools down as a result. Since the air around a tornado is usually moist, the tiny droplets condense in the tornado to form a cloud. The strong upward-moving wind in a tornado can also lift dirt and debris into the air to form a swirling cloud of dust.
They are not alive, and thus cannot see you.
Tornadoes do form in deserts, but very rarely. Deserts often see whirlwinds called dust devils. They look like tornadoes but are weaker and form on sunny days while tornadoes form from thunderstorms.
They form they same way as other tornadoes do. See the link below for information on how tornadoes form in general.
They do. Tornadoes are not uncommon in Kentucky, and some of them are quite violent. A few have been rated F5. However, because of the hilly terrain it can be difficult to see a tornado coming.
You can't. Tornadoes descend from thunderstorms, and so cannot be seen from above. You can, however, see the thunderstorms in a satellite image. See the link below for a satellite time lapse of storms tha produce tornadoes.
Connecticut can get tornadoes, but it is unlikely to see large numbers of them.
They are not alive, and thus cannot see you.
No. It is not common to see tornadoes unless you are a chaser or a spotter.
Tornadoes happen in Miami for the same reason they happen anywhere else. See the related question for how tornadoes form in general.
The most likely place to see tornadoes in the U.S. is on the great plains, particularly in Texas, Oklahoma, and Kansas.
Florida averages between 60 and 65 tornadoes per year.
Of course tornadoes have been seen. They're not invisible. in fact, they're huge. You can see videos of tornadoes if you do a YouTube search.
Tornadoes form in the southern hemisphere for the same reason they form in the northern hemisphere. The mechanics are the same. See the related question for what causes tornadoes
Yes. There have been documented cases of tornadoes merging. See the link below for a video of this happening.
Yes. Most tornadoes occur between noon and midnight, and about 42% of tornadoes occur at night. Tornadoes at night are especially dangerous because they are difficult to see.
When tornadoes are approaching they look like huge funnels. Tornadoes can approach an area very quickly You are advised to leave an hour before you can see the storm.
Tornadoes do form in deserts, but very rarely. Deserts often see whirlwinds called dust devils. They look like tornadoes but are weaker and form on sunny days while tornadoes form from thunderstorms.