What term describes waves generated by storms, which occur outside an area of observation?

Swells refer to the long, rolling waves that are generated by storms that occur far from the area where they are observed. These waves can travel great distances across oceans and seas, carrying energy from the storm with them. They are characterized by their smooth, gradual crests and can create a more organized wave pattern compared to other forms of wave activity associated with more immediate wind action.

Riptides are strong currents that move away from the shore, often caused by waves breaking on the beach, while ripples are small, short-lived waves typically generated by light winds or disturbances on the water surface. Undertows involve a subsurface flow of water returning to the ocean, which is also related to breaking waves but is distinct from the larger, more powerful swells that can travel significant distances. Thus, the term 'swells' is appropriate for describing these long-traveling waves created by distant storms.