Hurricane forecasters were tracking three disturbances in the Atlantic Ocean Sunday afternoon, one of which is expected to briefly become the season's fourth named storm as it moves away from the U.S. UPDATE: Tropical Storm Dexter forms in Atlantic as forecasters track two other disturbances

The Atlantic hurricane season is heading for a 'pivot point,' forecasters warn. What we know about August's forecast

Rapidly intensifying storms dramatically increase in August and September. With warming oceans, the Atlantic is primed for an active stretch of tropical storms and hurricanes.