Tornados form mostly in Bangladesh and the US. They from because of the position upon the Earth Relative Latitude and Longitude Between about 30˚-50˚ north or south The landscape/terrain Weather Conditions
Tornado Alley, USA 38.4500° N, 96.5333° W (Kansas) Bangladesh 23.8511° N, 89.9250° E
Most storms are produced in the spring and summer times of the year. Thunderstorms are an essential part of creating a tornado.
Tri-State Tornado Traveled through Missouri, Illinois, and Indiana. Single deadliest US tornado, killing 695 people. Was the fastest tornado on Earth at 73 mph. Ranks 3 in the scale of worlds worst tornados. Daulatpur-Saturia Costliest and most deadly tornado in Bangladesh on record. Daulatpur-Saturia holds the record for most persons killed at roughly 1,300 people. Ranks first in worlds tornados.
Tri-State Tornado Was part of a tornado outbreak. Was said to have lasted 3.5 hours while traveling 234 miles (377 km) Estimated cost of damages including inflation rates is $1.4 billion. Daulatpur-Saturia Storm estimated to be 1 mile long with a path of destruction estimated to be about 50 miles long. Bangladesh Observer stated that "The devastation was so complete, that barring some skeletons of trees, there were no signs of standing infrastructures"