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07 Feb 2024 | 03:27 AM UTC

South Pacific Ocean: Tropical Cyclone 11 forms in the South Pacific Ocean and is tracking southeastward east of American Samoa afternoon Feb. 6

TC 11 tracking southeastwards in South Pacific Ocean. Close approach to American Samoa through Feb. 6.

Critical

Tropical Cyclone 11 has formed and is tracking southeastward across the South Pacific Ocean, east of American Samoa, the afternoon of Feb. 6. As of 16:00 SST, the storm's center of circulation was approximately 98 km (61 miles) east of Manuʻa Islands, American Samoa.

Forecast models indicate that the storm will strengthen slightly as it tracks generally southeastward away from the Manuʻa Islands, American Samoa, through the afternoon of Feb. 7, before making a sharp turn to track northwestward while weakening into a tropical depression through the afternoon of Feb. 9. Some uncertainty remains in the track and intensity forecast; significant changes could occur in the coming days.

As of the afternoon of Feb. 6, the National Weather Service (NWS) has issued gale and high surf warnings as well as flood watches across American Samoa.

Sustained heavy rainfall could trigger flooding in low-lying areas and those with easily overwhelmed drainage systems. Localized evacuations, flash flooding, and landslides are possible if weather conditions prove hazardous.

The inclement weather could trigger localized business, transport, and utility disruptions, rendering some bridges or roadways impassable. Flight disruptions at regional airports and temporary closures of ports are also possible. Stagnant pools of water during and after flooding increase insect- and waterborne diseases, such as dengue fever, cholera, and malaria. Raw sewage and other hazardous materials mixed with floodwaters pose a serious health threat.

Activate contingency plans in areas where officials forecast tropical cyclone conditions. Heed any evacuation orders that may be issued. Use extreme caution in low-lying coastal areas and near streams, creeks, and other waterways due to the potential for severe flooding and storm surge. Stockpile water, batteries, and other essentials in advance. Charge battery-powered devices when electricity is available; restrict the use of cellular phones to emergencies only. Power down mobile devices when not in use. Keep important documents and necessary medications in waterproof containers. Observe strict food and water precautions, as municipalities could issue boil-water advisories following flooding events. Take precautions against insect- and waterborne diseases in the coming weeks.

Plan accordingly for protracted commercial, transport, and logistics disruptions in areas in the path of the storm, especially if vital infrastructure is damaged. Seek updated information on road conditions before driving or routing shipments through areas where flooding has occurred. Confirm flights before checking out of hotels or driving to the airport; clearing passenger backlogs may take several days in some locations.