 Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion.The first tropical cyclone was an unnamed moderate tropical storm that formed northeast of Madagascar on September 13, 2018, two months before the official start of the season.Two cyclones formed in the month of November, with Intense Tropical Cyclone Alcide forming on November 5, and Severe Tropical Storm Bouchra entering the basin from the Australian region on November 9.