There are many reasons to be awed by the weather. Take a look at the overall size of TS Andrea (1) and the involvement of the other two non-tropical systems. The hybrid/baroclinically enhanced nature of Andrea is apparent as she maintains a banded structure in her NW and NE quadrants yet has an impressive warm front, a dry slot and a trailing frontal system still drawing heat and moisture from the deep tropics.
The trailing storm system (2). is being drawn into Andrea's structure much like a typical upper low that shadows major winter storms. System #3 is a typical leading system that provides a trailing front that paves the way for heavier system.
There is no doubt that we are in for several inches of rain along and near the track.