Originally Posted by Engine

Like Janszoon said, it's just showing the size of the storm relative to the size of Europe. That's the actual size of the storm superimposed on a map - to scale. Supposing the eye of the storm happened to occur where the picture shows, you would probably be having high winds, heavy rain, power loss and trees falling, and maybe flooding there in Dublin.
I just thought it was interesting. Western Europe is such a tiny place, and this storm is so large.