Disturbance

A disturbance is a meteorological event. Either a Cold Front, a Warm Front, an Occlusion etc...

A disturbance is made up of different elements:

The body: main part. VFR flight impossible because of cloud masses.
The warm sector: poor visibility, Stratocumulus and Stratus generating light Precipitation, VFR possible.
The trail : good visibility, cumuliform clouds, some showers and thunderstorms.
The link: provides a link with the warm sectors of the excessive disturbances.
The margin: northern and southern parts of the disturbance, with no impact on VFR.
The interval: the area between two disturbances.