We have all seen spirals. We all know what that geometrical shape looks like. Spirals are the mathematical introduction of the whirls. The whirl around the center makes things like tropical storms possible. When tropical hurricanes form the interaction between falling and rising air in the middle of the whirl makes the air pillar that the Coriolis force starts to turn. In a hurricane, there is the falling air pillar that rising air surrounds. That low pressure forms a whirl that denies that the rising air pillar cannot spread. And then. That air spiral starts to pack air against the air pillar that forms the eye of the storm. In the diagram, you can see, that there is a rising air around the falling air. That thing makes energy fall into the middle of the whirl. And because the falling air has a lower temperature than the air spiral around it, that packs the spiral against cold air. If there is no cold air channel the whirl will be broken. The cold air conducts energy. Out from the h