Weather experts remain fascinated with Tropical Cyclone Zelia which hit WA's Pilbara coast on Friday afternoon.

A developing tropical low to the north of WA’s Kimberley coast may become a tropical cyclone later this week, continuing an active season for the unusually warm waters off Australia’s northwest coast.

The name change to Gulf of America is the first since the 1540s where various maps referred to it as the Mexican Gulf, Golpho de la Nueva España, and, finally Gulf of Mexico.