Cyclonic Conditions

Sinking (downward) motion in the atmosphere, usually over a broad area. Generally associated with anticyclonic conditions, high pressure and clear skies.
Subtropical ...

Disturbance: A small area of low pressure.
Diurnal:Daily.
Divergence:In the atmosphere when air diverges it sinks, moves clock wise and outward creating
"High Pressure" Centrifugal Force. Compressional Warming. Anti-Cyclonic conditions.

See also: Cloud, Wind, Water, Pressure, High