Caribbean Sea: Tropical Storm Franklin tracking northwestward in the Caribbean Sea as of early Aug. 22 /update 2

Event

Tropical Storm Franklin is tracking northwestward in the Caribbean Sea early Aug. 22. As of 05:00 EDT, the system's center of circulation was approximately 415 km (255 miles) south of Santo Domingo, Dominican Republic.

Forecast models indicate that the storm will strengthen slightly as it tracks north-northwestward and then northward in the Caribbean Sea Aug. 22. Franklin is forecast to strengthen further as it turns to track north-northeastward before making landfall over the Dominican Republic close to Santo Domingo early Aug. 23. The system is then forecast to weaken as it passes over the Dominican Republic before entering the North Atlantic Ocean during the afternoon Aug. 23. The storm is subsequently likely to strengthen as it tracks northeastward and then east-northeastward across the Sargasso Sea region of the North Atlantic Ocean Aug. 24-25. Franklin is then expected to strengthen into a Category 1 hurricane as it turns sharply to track north-northwestward early Aug. 26-27. Some uncertainty remains in the track and intensity forecast, and significant changes could occur over the coming days.

As of early Aug. 22, authorities had issued the following coastal watches and warnings:

• Tropical Storm Warning: Dominican Republic's entire south coast from Haiti border eastward to Isla Saona and Haiti's entire south coast from Anse d'Hainault eastward to the Dominican Republic border.

• Tropical Storm Watch: Dominican Republic's entire north and east coast from the Haiti border eastward and southward to Isla Saona and the Turks and Caicos Islands.

Authorities will likely issue new warnings and update existing advisories throughout the system's progression in the coming hours and days.

Tropical storm conditions are forecast in the warning area from late Aug. 22-early Aug. 23 and are possible in the watch area Aug. 23. Franklin is forecast to produce rainfall totals of 12.5-25 cm (5-10 inches), with locally higher amounts of up to 38 cm (15 inches), across parts of Hispaniola through Aug. 23. Rainfall totals of 2.5-7.5 cm (1-3 inches), with locally higher amounts of around 15 cm (6 inches), are expected across Puerto Rico and Vieques through Aug. 24. Storm surge will raise water levels by 0.3-0.9 meters (1-3 feet) above ground level along the immediate coast near and to the east of where the center of the storm makes landfall in Hispaniola.

Authorities in the Dominican Republic have issued red emergency alerts (the highest level on a three-tier scale) due to the storm across 14 provinces in the south and west of the country, including the National District region. Yellow alerts are in place across the remaining provinces of the Dominican Republic. Small vessel operators have been advised to remain in port along the Caribbean coast.

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

The inclement weather could trigger localized business, transport, and utility disruptions and render 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 may increase the incidence of insect- and waterborne diseases, such as dengue fever, cholera, and malaria. Exposure to raw sewage and other hazardous materials mixed with floodwaters poses a serious health threat.

Advice

Activate contingency plans in areas where officials forecast tropical storm 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.

Resources

US National Hurricane Center