original: 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.
simplifications: Helene turned into a hybrid storm that afternoon. It had a deep warm core and an uneven, frontal-like look. Helene turned into a "hybrid" storm that afternoon, with both a deep warm core and a frontal-like appearance. Helene transitioned into a "hybrid" storm that afternoon, with a deep warm core and a frontal-like appearance. Helene formed into a hybrid storm. A hybrid storm has tropical and extratropical traits. Helene's frontal appearance was lopsided, but the core was warm. Helene turned into a "hybrid" storm with both tropical and extratropical features that afternoon. It had both a deep warm core and an asymmetric, frontal-like look. Helene became a "hybrid" storm with both tropical and extratropical features that afternoon. It had a deep warm core and an uneven, frontal-like appearance. Helene turned into a "hybrid" storm with a deep warm core and an asymmetrical appearance. Helene had both tropical and extratropical characteristics. The hybrid storm had a warm core and an asymmetric appearance. 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 Helene changed into a hybrid storm with both tropical and extratropical characteristics