Complex sentence: While fully tropical, Leslie strengthened slightly and peaked with winds of 45 mph (75 km/h), though it soon began interacting with a cold front, and by late on October 7, it transitioned into an extratropical cyclone while located northwest of Bermuda.
Split into simpler sentences: While fully tropical, Leslie strengthened slightly and peaked with winds of 45 mph (75 km/h). However, it soon began interacting with a cold front and transitioned into an extratropical cyclone on October 7, while located northwest of Bermuda.