Tropical Storm Helene (2000)
Tropical Storm Helene was a long-lived tropical cyclone that oscillated for ten days between a tropical wave and a 70 mph (110 km/h) tropical storm. It was the twelfth tropical cyclone and eighth tropical storm of the 2000 Atlantic hurricane season, forming on September 15 east of the Windward Islands.
Source: Wikipedia — Tropical Storm Helene (2000) (CC BY-SA 4.0)