sentences:  Six hours later, the depression intensified into Tropical Storm Iselle.High pressure to its north directed Iselle on a northwest trajectory, while moderate easterly wind shear limited the storm peak to 50 mph (85 km/h) on the morning of August 14.Increasing upper-level winds, cooler waters, and entrainment of dry air all hindered the system, causing it to weaken to a tropical depression around 00