A surface trough was offshore the southeast coast on June 29th and 30th. The northern end of the trough extended inland across
eastern Georgia and South Carolina early on July 1st, producing disorgnized convection. With the trough drifting offshore,
thunderstorm activity developed and became more organized, with the system becoming a tropical depression that afternon
just offshore. Moving north towards the South Carolina coast, the cyclone strengthened into a tropical storm 30 miles
offshore Savannah that afternoon. On the evening of 1st, Colin moved inland near Hunting Island, South Carolina. It
turned norteast just inside the South Carolina coast which kept it a tropical storm until the morning of the 2nd. By
afternoon, thunderstorm activity waned and it weakened into a tropical depression. That evening, the low was
no longer well-enough defined to be considered a tropical cyclone.
The graphics below show the storm total rainfall for Colin, which used rain gage information from National Weather Service
River Forecast Centers, National Weather Service Forecast Offices, and CoCoRAHS.
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