 A QuikSCAT analysis early on September 23 confirmed a high-end Category 1 hurricane with 90 mph (145 km/h) winds.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.