Helene transitioned into a "hybrid" storm with both tropical and extratropical characteristics that afternoon, with both a deep warm core and an asymmetric, frontal-like appearance. After that, increased shear weakened Helene once again, although it remained a hurricane-strength storm until it was fully extratropical on the morning of September 24. After becoming extratropical, the storm weakened as it tracked eastward, becoming a gale center west of Ireland early on September 27. It eventually merged with a larger extratropical low near the northern end of the British Isles late on the 27th.