Ok here is the deal. I contacted NCDDC (btw Frank they are at Stennis, too...any questions just track down Russ Beard), and they responded promptly, and that 35 ft mark is a wave mark, practically on top of a 25 ft surge mark, probably hiding the surge mark on the map (these were likely a pair of indoor/outdoor marks). Both were thrown out by FEMA. NCDDC is in the process of adding another layer to the impact tool to hide all those marks that were thrown out; that layer was not available in the original data they received from FEMA.
Ten feet of wave runup at that location is not beyond the range of reasonable possibility, but it is towards the tail end of the distribution. If you recall videos from Gulfport and Biloxi both showed no significantly high wave runup, which is not surprising given the shallow water in the sound. I will post again if I can ever get hold of the FEMA contractor notes showing why they threw out the numbers (there will be some reason as to why they were considered not valid).
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