Complex sentence: Moving along a generally west-northwestward path in the following days, the storm passed over an area having cooler waters and a moderate vertical wind shear, the storm's low-level circulation center started losing its structure, triggering a weakening trend.
Split into simpler sentences: Moving along a generally west-northwestward path in the following days, the storm passed over an area having cooler waters and a moderate vertical wind shear. The storm's low-level circulation center started losing its structure, triggering a weakening trend.