When you're in a warehouse during a tornado you should go to the lowest floor, find a small, windowless interior room such as a closet, office, bathroom etc, that is away from any outside walls, glass and wide span roofs.
And get under something that is sturdy, such as shelves or a desk if possible and cover your head and neck to protect you from flying debris.
And avoid any large open areas, windows and elevators.
If the warehouse has a tornado shelter you should go to tornado shelter if possible.
Restrooms, closets, maintenance rooms or offices without windows are ideal for being in, during a tornado when you can't get out of the warehouse and into a safer place as they are enclosed and often are more structurally sound than the warehouse itself.
Tornadoes usually last a few seconds to 10 minutes, although some tornadoes can last over an hour.
Most tornadoes are actually weak and last only a few minutes, and stronger tornadoes often last 20 minutes or longer and the rare violent tornadoes can last for over an hour.
The length of time that a tornado lasts is also directly related to the strength of the tornado.
Weak tornadoes are tornadoes in the EF0-EF1 category and are the most common tornadoes and often last less than 10 minutes, with the average weak tornado lasting around 2 minutes to 3 minutes.
Strong tornadoes are in the EF2-EF3 category and can last for 20 minutes or longer.
Violent tornadoes are tornadoes in the EF4-EF5 category and are the rarest tornadoes but also longest lasting tornadoes and can last over an hour.
The tornado alley shifted east, with increased tornado activity moving from the traditional Great Plains, "Texas, Oklahoma, Kansas", towards the Midsouth and Southeast and impacting states like Tennessee, Arkansas, Mississippi, Alabama, and Missouri, partly due to climate change altering moisture and patterns.
The shift means that more frequent and intense tornado outbreaks are occurring in the Dixie Alley region, which was a change that was driven by warmer Gulf waters and different atmospheric setups.
The worst tornado in history was the Tri-State Tornado that occurred on March 18th, 1925, which was the single deadliest tornado in the history of the United States.
The Tri-State Tornado that occurred in 1925 on March 18th killed at least 20 farm owners in southeastern Illinois and southwestern India.
In the midday and the afternoon hours of Wednesday, March 18th, 1925, the Tri-State Tornado which was the deadliest tornado in United Stats history and the second deadliest tornado worldwide moved through Eastern Missouri, Southern Illinois and Southern India, killing 695 people and also injuring 2,027 more people.
The damage done by the Tri-State Tornado in 1025 was $16.55 million in $1925 dollars which is equal to $2.9 billion now.
The cause of the Tri-State Tornado was a result of the collision of warm and moist air from the Gulf of Mexico with cool, dry air from the west, which created a highly unstable atmosphere.
The clash of air masses, when combined with a powerful low pressure system and strong winds at different heights, fueled the long lived supercell thunderstorm, which produced the tornado.
The highly favorable setup occurred at the triple point where the warm front, cold front and dry line met, maximizing low level convergence and opment.
A low pressure system pulled warm, moist air northward, while cooler, drier air moved in from the west.
Where these air masses met, they created a highly unstable atmosphere.
Another baddest tornado or worst tornado was the 1989 Bangladesh tornado of (Manikganj/Saturia).
The 1989 Bangladesh tornado of (Manikganj/Saturia) killed around 1,300 people.