Twister ( UPSC Prelims)

News Context

Violently spinning at speeds of 250 miles per hour, these funnel-shaped columns of air extend from dark thunderclouds down to the ground.
  ● Recent Occurrence: USA  
  ● Formation: These phenomena develop when moist and warm air collides with dry and cold air, leading to atmospheric instability and creating strong updrafts within a thunderstorm.  
        ○ The resulting wind shear causes the air to spin, and if this rotation is tilted vertically and intensifies, a tornado (or twister) forms.
        ○ The majority are formed around the Gulf of Mexico, which acts as a large source of moisture.