 On June 24, a mid-level circulation developed near the Yucatán Channel, and shortly thereafter satellite image loops indicated deep convection with some cyclonic rotation near the western tip of Cuba.A reconnaissance aircraft flight was dispatched late on June 24 into the system to determine if it developed into a tropical cyclone, though the flight did not observe evidence of a closed low-level circulation.Subsequent to the flight, satellite imagery indicated a low-level circulation was forming, and on June 25 ship and buoy data confirmed the system developed into Tropical Depression One while located about 235 miles (375 km) west-southwest of Key West, Florida.