Complex sentence: On October 9, Ivan turned to the north in advance of an approaching cold front and extratropical storm, while slowly weakening as it accelerated over cooler waters of the far northern Atlantic Ocean.
Split into simpler sentences: On October 9, Ivan turned to the north in advance of an approaching cold front and extratropical storm. The next day, the hurricane began weakening as it accelerated northeastward over cooler waters of the far northern Atlantic Ocean.