In recent days, many lives were lost because of a tornado.
The wind in a tornado spins accordingly to the temperature of the air
This is what happens after a tornado.
Example: A tornado can knock over houses and spoil towns and villages.
A tornado is a destructive force of nature.
There was a big disaster after the tornado in town.
"A tornado hit the barn." would be a sentence.
On its own, tornado is simply a noun. As with any noun, whether it is the subject or the object depends on how it is used in the sentence. In this sentence, "tornado" is the subject while "houses" is the object: "The tornado destroyed several houses." In this one, "tornadoes" is the object: "I saw a tornado."
"When a tornado warning is issued, we should evacuate and go to Auntie Glen's in Virginia." Said Mom.
The whirling, spinning vortex of a tornado sucked everybody in.
That air raid siren you hear also serves as a tornado warning. The shrieking winds of the tornado will sound like a freight train passing by.
The tornado left a wide swath of destruction.
You could say: "The amount of debris from that tornado was devastating!"