One of nature's most violent storms is tornadoes! Tornadoes' speeds are 20-70 mph and they grow 50,000 ft in air. The conditions that lead to the formation of tornadoes are most common in central and southern U.S. This area dubbed "tornado alley" extends from the Rocky Mountains to the Appalachians,from Iowa to Nebraska, to the Gulf of Mexico. Tornadoes can also occur elsewhere; including the U.S. States, Europe, Asia and Australia. Their range of time can last from 30 to 90 minutes and can go as fast as 70 mph. Before a tornado occurs, it may get calm, with no wind and the air still. The sky turns to a greenish gray look. A tornado appears as a rotating funnel shaped cloud that touches the ground with whirling winds reaching 300 miles per hour. Tornadoes damage paths can be one mile wide and 50 miles long resulting in fatalities and neighborhood destruction.



An intense vertical column is called a waterspout tornado. A waterspout usually appears as a funnel shaped cloud that occurs in a body of water rarely fifty yards wide and is connected to a cumuliform. The sky is blackish and bluish and grayish. Waterspouts exist in the sky, where their environment is less than two kilometers in width. They are super celled waterspout tornadoes. While some waterspouts are strong and tornado in nature; land spouts have formed like water spouts. The sky is usually dark blue and black. Waterspouts are less intense and cause far less damage. Waterspouts dissipate upon reaching land.



A fire whirl colloquially fire devil or tornado is a rate in which a fire under certain conditions depending on the air temperature and currents acquires a vertical voracity and forms a whirl or a tornado like vertically oriented rotating column in the air. Sometimes the intense heat created by a major forest fire or volcanic eruption creates a fire spout. They are 30 to 200 feet in the air and spread rapidly. They are also known as fire tornadoes, fire devils or even firenadoes. An estimated 100 mph winds have been associated with fire whirls. Fire whirls leave behind fatalities & major devastation.



A long-lived thunderstorm is a called a supercell thunderstorm. Supercells can sometimes develop two separate updrafts with opposing rotation which split storms into two supercelled tornadoes. One side of the tornado is rain free while the other side is in dense shafts of rain. They can produce heavier rainfall. Supercells are isolated from other thunderstorms and can dominate the local climate up to 20 miles away. Supercell thunderstorms produce the most violent tornadoes. The tornadoes that are associated with supercell thunderstorms usually remain in contact with the ground for at least one hour if not more. They are very violent with winds exceeding 200 mph.



A dust devil tornado is different from all the other tornadoes, because they are not associated with thunderstorms or any clouds. Dust devils are triggered by light breeze in the desert or dry land. They occur in the hot sun during late morning or early afternoon hours. Dust devils are swirling plumes of dust with speeds up to 70 mph and only last for a few minutes or less. These are usually weaker than the weakest tornado. They have been know to cause minor damage, like blow vehicles off the road and damage your eyes by dust getting in them.