Original: Dvorak classifications began on October 14, and by late October 15 the surface circulation in the system became well-enough defined, with sufficiently organized deep convection, for the National Hurricane Center to designate the system as Tropical Depression Twenty-Four while located about 220 miles (345 km) east-southeast of Grand Cayman.
Simplified: By late on October 15, the system was became strong for the National Hurricane Center to name it Tropical Depression Twenty-Four.