May 30, 2005. This was the Wind Speed and Direction May from the National Weather Service. If one looks closely the blue area is surrounded by 'wind indicators' that point in all directions. If one connects the direction it is a circle. That was a vortex or from these pictures a hurricane of kind that dropped a lot of water over a large area. It is not a far reach to understand the least water would be at the center of that storm rotation while the periphery which probably reached all the way to Mississippi carried the most rain.