South China Sea: Tropical Depression 26W forms Dec. 20

Event

Tropical Depression 26W formed in the South China Sea early Dec. 20. As of 1600 ICT, it was located approximately 898 km (558 miles) east of Ho Chi Minh City, Vietnam The storm is moving in a westerly direction. Meteorologists predict that the system will intensify into a tropical storm, and will be named Krovanh, as it shifts to a more west southwesterly course by mid-Dec. 22. Models indicate that the system will make a close approach to, or landfall over, far southern Vietnam late Dec. 23-early Dec. 24, though it will have weakened to a post-tropical low pressure system by this juncture. Significant uncertainty exists regarding the track and intensity forecasts, and changes are possible in the coming days.

Regardless of the exact track of the system, heavy rains and strong winds are likely in parts southern Vietnam, and southern and eastern Cambodia. Rainfall associated with TD 26W could trigger dangerous flash and urban flooding in low-lying communities near watercourses, as well as in urban environments with easily overwhelmed storm drainage systems. Rain-induced landslides pose an additional threat in hilly or mountainous locations. Authorities may issue evacuation orders in low-lying coastal areas and in regions that are prone to landslides. Winds may result in property damage and utility outages throughout the affected area. Storm surges are possible as the storm tracks closer to land.

Transport
The passage of the system will may prompt ground, air, and maritime transport disruptions in affected areas in the coming days. Traffic and commercial trucking may be delayed as the system transits the region. Strong winds could uproot trees or spread debris that might damage infrastructure or impede access along important thoroughfares. Landslides could block roads in areas of mountainous terrain, and flooding could inundate some routes. Rail disruptions are also possible.

Heavy rain, flooding, and strong winds may result in flight disruptions at regional airports in the coming days.

Vessel movements and cargo handling could be suspended at regional ports. Ferry services may be suspended due to rough seas.

Advice

Review contingency plans and prepare for the storm's arrival as early as possible. Be prepared to evacuate low-lying coastal areas as the storm approaches. Use caution in areas below major dams and around streams and other watercourses that could be prone to flash flooding. Confirm flights and rail reservations. Seek updated information on road conditions before driving or routing freight through areas affected by the typhoon. Plan accordingly for probable supply chain problems, especially if shipping cargo through regional airports or ports. Confirm flights before checking out of hotels or traveling to the airport. Charge battery-powered devices, and stockpile water and nonperishable food in case prolonged electricity outages occur.

Resources

Joint Typhoon Warning Center: www.metoc.navy.mil