Tropical Storm Kirk was the second lowest-latitude tropical storm on record in the Atlantic basin. The eleventh named storm of the 2018 Atlantic hurricane season, Kirk originated from a tropical wave that left Africa on September 20 and organized into a tropical depression two days later. The system intensified into Tropical Storm Kirk early on September 22 but quickly degenerated into a tropical wave again early the next day. A reduction in the disturbance's forward speed allowed it to regain tropical storm intensity on September 26. Kirk reached maximum sustained winds of 65 mph (100 km/h) that morning before increasing westerly wind shear caused the cyclone to steadily weaken. The storm made landfall on Saint Lucia with winds of 50 mph (65 km/h) before continuing into the Caribbean Sea.