How did you decide 1-2 miles inland and that's it? The angle of approach, location, slope of the continental shelf and terrain elevation also determines surge with inland flooding. A powerful storm will empty bays (example Tampa and Sarasota Bays with Irma) on one side of the storm, while piling (surge) water at the coast and inland on the dirty side. When storm winds offshore on the dirty side of the storm push water onshore-and prevent the natural flow of rivers and streams to empty-water piles up.
Your simple dismissal of all else tells me you really don't understand storm surge at all.
again...the 2 greatest storm surges ever recorded in the western hemisphere ...Hurricane Camille and Katrina both happened on the same Mississippi coast. Mississippi Sound has a very shallow shelf...the water really piles up....but both never went more than 1 to 2 miles inland. Read the after action reports...study aerial photographs..i visited Wade Guice, Harrison County civil defense director during Camille...we spent the entire day in Pass Christian..Long Beach...Gulfport. In Camille, the only true cat 5 to directly hit the mainland, everything within 6 blocks of the ocean was destroyed...thats it, 6 blocks. All surge damage stopped after the railroad tracks, about a mile form shore. Katrina surge damage actually went past the railroad tracks, something most thought would never happen...eclipsing Camille. This ridiculous claim of 40 mile from shore storm surge was absurd. Dont think the NHC isnt political...media was already saying Trump should cancel his speech tonight...combined with their global warming fantasies...i know bs when i hear it.
10:30AM CST: Still nothing here -- so far -- at the TX-LA-AR border junction, (aka "Three States")...
..but some solid rain @ ~5AM. But, the eye is still some 90 miles SSE of us...
TXnMA