The National Hurricane Center (NHC) changed the designation of Invest 92L to Potential Tropical Cyclone 02 on Sunday evening. NHC implemented a new policy for 2017 which allows it to issue tropical cyclone watches and warnings before it officially classifies a system as a tropical cyclone. NHC issued Tropical Storm Warnings for some of the Windward Islands because of Potential Tropical Cyclone 02 on Sunday evening in accordance with the new policy.
At 11:00 p.m. EDT on Sunday the center of Potential Tropical Cyclone 02 was located at latitude 7.9°N and longitude 52.4°W which put it about 630 miles (1015 km) east-southeast of Trinidad. It was moving toward the west-northwest at 23 m.p.h. (37 km/h). The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h). The minimum surface pressure was 1005 mb.
Tropical Cyclone Warnings have been issued for Barbados, St. Vincent, the Grenadines, Grenada, Trinidad, and Tobago.
The circulation of Potential Tropical Cyclone 02 appeared to get better organized on Sunday evening. Satellite imagery seemed to indicate that a more circular area of thunderstorms was forming around the center of circulation. The system was already producing sustained winds to 40 m.p.h. (60 km/h) and if a center of circulation develops, it will be classified as a tropical storm.
Potential Tropical Cyclone 02 will move through an environment that will be somewhat favorable for intensification during the next 24 hours. It will move over water where the Sea Surface Temperature is near 29°C. An upper level trough over the eastern Caribbean Sea is generating southwesterly winds that are causing some vertical wind shear. Potential Tropical Cyclone 02 has about 24 to 36 hours before the shear increases significantly. After that time the system will weaken.
A subtropical high pressure system over the Atlantic is steering Potential Tropical Cyclone 02 toward the west-northwest. A general west-northwesterly motion is expected to continue. On its anticipated track Potential Tropical Cyclone 02 will reach the southern Windward Islands later on Monday. It will bring gusty winds and locally heavy rain when it gets there.