A powerful low-pressure system swept past Iceland after forming over the North Atlantic from the remnants of Hurricane Isaias. The storm, classified as an extratropical cyclone, retained energy from the tropical cyclone that spawned it before reorganizing into a mid-latitude system.

The event illustrates a well-known meteorological process: extratropical transition, whereby a hurricane moving away from warm waters loses its tropical structure and reorganizes into a frontal system driven by the temperature contrast between air masses. In this case, the remnants of Isaias provided the seed for the cyclone's development over the North Atlantic.

The system's track carried it past Iceland, where North Atlantic extratropical cyclones are a regular feature of the winter and transitional-season climate. Observing such events helps track storms that, although originating in the tropics, ultimately affect high latitudes far from their point of formation.