In its first advisory on the re-developed cyclone, the National Hurricane Center classified the system Ivan "after considerable and sometimes animated in-house discussion of [its demise]... in the midst of a low-pressure and surface frontal system over the eastern United States... based primarily on the reasonable continuity observed in the analysis of the surface and low-level circulation." In spite of unfavorable wind shear and its disorganized cloud structure, the cyclone strengthened to tropical storm status early on September 23, based on Hurricane Hunter reports. As an area of deep convection developed over the center, Ivan reached winds of 60 mph (95 km/h), though the winds decreased as thunderstorm activity diminished. Ivan weakened to a tropical depression at 0000 UTC on September 24, and two hours later it moved ashore near Holly Beach, Louisiana.