Shower and thunderstorm activity accordingly intensified, and the NHC assessed a high chance for tropical or subtropical development.[4] At the time, the center of circulation remained poor; however, it became better defined later that day, with a stable amount of corresponding convection.[5] Although the upper low had remained adjacent, it was located well to the southwest of the system's small wind radius, an atypical structure for a subtropical cyclone.[6] The system was therefore operationally designated as Tropical Storm Shary at 0000 UTC October 29, though post-season analysis revealed a tropical depression had formed by 1800 UTC October 28, about 520 mi (830 km) south-southeast of Bermuda.[7][1] At the time of classification, the agency noted that Shary would be a relatively short-lived tropical cyclone due to a merge with a cold front forecast to occur within the following 48 hours.[6]