The relevant development in this case study has its origin in the South of Greenland. Main features in the first IR image are two low pressure systems. One can be found to the north of Great Britain and is characterized by pronounced cloudiness on both fronts. The second system is situated in the South of Greenland.
On its back side the cyclone over northern Europe advects cold air from northern areas to the South while the system south of Greenland intensively advects warm air on its foreside to the North. This is the basic constellation of the upcoming development, which is strongly associated with the increasing temperature contrast and upper air processes.