Storm Surge is currently being forecast at 8 feet to 12 feet. By NHC. Depending on the location and slope of the coastal shelf and beachfront.

Mainly dependent upon minimum central pressure (MCP) of the storm. Other factors are Moon Phases with Full Moon and New Moon having larger tides.
The tides are Outside of the calculation,
In other words. Landfall at High tide under a New Moon or Full Moon will add roughly 1-2 feet to the Surge. Not including the Storm Waves.

Rough quick estimation formula.
1000mb - minus current MCP 977 divided by 4 equals current minimum surge.

1000-977=23/4 equals a minimum 5.75 foot surge with out Tide or waves.

If you are under a Surge Watch or Warning Heed NHC advisories and Get Out NOW while you can before the Roads become Clogged.