The National Hurricane Center is tracking two weather systems in the Atlantic Ocean – neither of which pose immediate risk to the United States – while Henriette and Ivo wax and wane in the Pacific Ocean.

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

Atlantic hurricane season is about to hit its stride. August through mid-September is historically the most active stretch of the season, and while there have been a handful of short-lived named storms,