Pressure

The inversion boundary varies its altitude primarily in response to the weight of the air above it, which is measured in terms of atmospheric pressure.

The marine layer, and any fogbank it may contain, will be "squashed" when the pressure is high, and conversely, may expand upwards when the pressure above it is lowering.

Storms are created when a center of low pressure develops with the system of high pressure surrounding it.

Small localized areas of low pressure can form from hot air rising off hot ground, resulting in smaller disturbances such as dust devils and whirlwinds.

There's also a clear link between cat ownership and a lowered risk of strokes or heart problems, as a cat's purr lowers blood pressure.