COMSTOCK PARK, Mich. — While we've done the tornado in a bottle weather experiment before, it was appropriate to conduct it at Pine Island Elementary School in Comstock Park, since the school was damaged by a high end EF1 tornado in August of 2023. Before the experiment, I spent time going over tornadoes specifics, and where the safest places to be are when a tornado warning is issued. The basement is always the safest place, or an interior room with no windows.
We need two clear 64-ounce soda bottles, one with about three-quarters full of water. A plastic coupler to tie or link the bottles together is necessary too. The bottle can also be duct-taped together in a pinch. If the bottle is inverted with the water on top, inducing a spin will create a tornado, vortex, or swirling motion which will drain into the lower bottle. The purpose is to replicate a tornado with the spinning water and vortex transferring from one bottle to another.
Tornadoes are created by a spinning motion. Many times when cold and warm air meet, that can force, start, or induce a spinning motion in the atmosphere. Whether in a bottle of water or in the atmosphere, it's fluid dynamics. Both operate in a similar fashion. Putting a spin on the water bottles will ultimately create a tornado or vortex in the bottle.
A tornado is a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. It is often referred to as a twister, whirlwind or cyclone. Tornadoes in the northern hemisphere rotate counterclockwise, and clockwise in the southern hemisphere. If the condensation funnel of a tornado never makes contact with the ground, it's considered a funnel cloud. It must make contact with the ground in order to be considered a tornado.
It's worth noting that cold air funnels over Lake Michigan form in a similar fashion. Warmer lake waters in the fall can create a spinning motion when colder air flows over the lake. These funnels are typically much weaker than regular (inland) tornadoes.