Complex sentence: Hurricane Pam was a slow-moving Category 3 storm with 120 mph sustained winds, bringing with it up to 20 inches of rain to some parts of southeast Louisiana and levee-topping storm surge.
Split into simpler sentences: Hurricane Pam was a slow-moving Category 3 storm with sustained winds of 120 mph. It brought with it up to 20 inches of rain to some parts of Southeastern Louisiana and caused levee-topping storm surge.