I think most people here now know how to read these statements fairly clearly. Winds at 115 mph with a pressure of 940 mb. The stats for a Cat 3 are 111-130. The expected barometric pressure for a Cat 3 is 945-964 mb. This hurricane had wind speeds at the very low end of Cat 3 but had a barometric pressure in the Cat 4 range. Not a good mix. Moving at only 7 mph: means it has plenty of time to grow. No shear winds and nice hot Gulf waters: even very early Saturday it was obvious that this was a scary storm. Once this report came across and was evaluated, the mandatory evacuation should have happened.