Complex sentence: It degenerated into a tropical storm while crossing the Baja California Peninsula, and after passing through the northern Gulf of California it made a second landfall near Isla Tiburon in the state of Sonora.
Split into simpler sentences: It degenerated into a tropical storm while crossing the Baja California Peninsula. After passing through the northern Gulf of California, it made a second landfall near Isla Tiburon in the state of Sonora.