Tropical Cyclone Ana has weakened into a Category 1 storm as it moves into southern Tongan waters today. The Fua’amotu Tropical Cyclone Warning Centre, at 5pm Monday, said a gale warning remains in force. On its current track, it could bring destructive storm force winds to Tele-ki-Tonga and Tele-ki-Tokelau and damaging gale force winds over Ha'apai, Tongatapu and 'Eua, early Tuesday morning.