Tropical Cyclone Advisory Number 15 for Tonga on Tropical Cyclone Ana (Category 1), 2 Feb 2021 Format TROPICAL CYCLONE WARNING FOR TONGA WARNINGS: A STORM WARNING REMAINS IN FORCE FOR TELE-KI-TONGA AND TELE-KI-TOKELAU AND THE SURROUNDING COASTAL WATERS. A GALE WARNING REMAINS IN FORCE FOR HA’APAI, TONGATAPU AND ‘EUA LAND AREAS AND COASTAL WATERS. A STRONG WIND WARNING REMAINS IN FORCE FOR THE NIUAS AND VAVA’U LAND AREAS AND COASTAL WATERS. A HEAVY DAMAGING SWELL AND SMALL CRAFT ADVISORY REMAINS IN FORCE FOR ALL OF TONGA COASTAL WATERS. A HEAVY RAIN WARNING AND FLASH FLOOD ADVISORY REMAINS IN FORCE FOR ALL OF TONGA LAND AREAS.