What causes a tornado to form?
The Short Answer: A tornado forms from a large thunderstorm. Inside thunderclouds, warm, humid air rises, while cool air falls–along with rain or hail. These conditions can cause spinning air currents inside the cloud.
Can lightning start a tornado?
Visible lightning, that is. In fact, as Marshall explained, there actually was lightning, a whole lot of it, in the storm that caused the Moore tornado. It’s just that most of it didn’t hit the ground and was thus unseen by humans.
What are the two things required for a thunderstorm to produce a tornado?
There are four main factors that must be present for a thunderstorm to produce a tornado and these are shear, lift, instability and moisture.
Why is there lightning but no rain?
Dry thunderstorm refers to thunder and lightning that occur without bringing rain to the ground. In fact, the thunder-bearing clouds do produce rain but the rain droplets have evaporated in the air before reaching the ground. … The anvil cloud is so high that rain coming from it evaporates before reaching the ground.
Why is there lightning but no thunder?
Thunder starts as a shockwave from the explosively expanding lightning channel when a large current causes rapid heating. However, it is possible that you might see lightning and not hear the thunder because it was too far away. Sometimes this is called “heat lightning” because it occurs most often in the summer.