Tornado black hole

A tornado black hole is a black hole formed when a tornado collects so much matter. These tornadoes usually form in the water, since there is so much mass in the water. In these tornadoes, a massive object gets shredded by the tornado. The total volume of the pieces of that object goes done, thus increasing the density. Eventually, this forms a black hole, and a tornado black hole is formed. What makes these tornadoes uniques is that they are long lasting, very small, and very dense. They will usually collect multiple cities before becoming black holes. Sometimes, they die out before they can become black holes.