19. Tornado

From a high pressure region the growth of the high pressure into the lower surrounding (lower) pressure: where there are increment differences, these are muted by three effects.

1. Bernoulli affect lowers the pressure in the motion area.

2. Coriolis forces act to dampen the outward flow activity by bending the vectors to the side.

3. That Coriolis forces also tend to curl away from the high center.

We can picture the flow from the high pressure side to the low pressure side.

From a low pressure region the growth of low pressure into higher surrounding (higher) pressure: where there are increment differences, these are amplified by these same effects.

1. Bernoulli effect lowers the pressure in the motion area.

2. Coriolis forces act to dampen the flow activity inward by bending the vectors to the side.

3. That Coriolis forces then tend to curl toward the low center.

All three effects tend to amplify rather than mute pressure increment differences with low pressure areas.

Low pressure is “expanding” along a line (due to Bernoulli and the focusing by Coriolis processes). Considering that the low pressure “tube” is drawn from a “stable” low pressure source (in a storm). The Coriolis process itself yields a lowering of pressure via Bernoulli, which aids further expansion and focusing of the low pressure “tube”, and its encapsulating mini-cyclone. Coriolis not only aids in expansion of the “tube”, but also focuses the “tube” of lower pressure air.

Jerome Heath