Fire tornadoes, more properly called fire whirls, generally form during very intense fires. Eddies, or weak vortices in the wind, may be caught in the rising air current or updraft of the fire. This causes the eddies to stretch, tighten, and intensify into fairly strong vortices, which then pull in smoke and fire.
Fire. While fire can occur naturally, many fires nowadays are started by humans.
a tornado in the form of fire
The "fire tornado" forms from the fire; it doesn't really matter how the fire starts. Also, a "fire tornado" is more properly called a fire whirl as it technically isn't a tornado.
a tornado in the form of fire
A tornado watch is issued by the National Weather Service when weather conditions are favorable for tornadoes to develop. It means you should stay informed and be prepared to take action if a tornado warning is issued for your area. It is a warning for potential tornado development, not a guarantee that a tornado will occur.
Tornadoes can occur in many parts of the world, not just in Tornado Alley in the central United States. They can form in any region where the right atmospheric conditions are present, although Tornado Alley does have a higher frequency of tornadoes.
Tornado Alley did not occur. It was not an event. Tornado Alley is a region in the central United States.
a tornado can occur at any time of the day or the year
On average, about 60-70% of tornadoes occur at night. This is because tornadoes can form at any time of day or night, but the atmospheric conditions that are conducive to tornado development may be more prevalent during the overnight hours.
Only to a limited degree. Meteorologists can predict areas where tornadoes might occur when the conditions for them arise. But there is no telling exactly when and where a storm will produce a tornado.
A "fire tornado" is not a true tornado but a whirlwind spawned by an intense fire. If such a fire is approaching the area where you live you should evacuate immediately.
A "tornado" of fire is called a firewhirl, but these are not true tornadoes.