I thought this was interesting. From a 994mb Tropical Storm and water pileup and tides.

STORM SURGE...A STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS
3 TO 5 FEET ABOVE GROUND LEVEL ALONG THE LOUISIANA COAST...AND BY AS
MUCH AS 2 TO 4 FEET ABOVE GROUND LEVEL ALONG THE MISSISSIPPI AND
ALABAMA COASTS INCLUDING MOBILE BAY. SEE PRODUCTS ISSUED BY LOCAL
NATIONAL WEATHER SERVICE FORECAST OFFICES FOR MORE DETAILS. A STORM
SURGE OF NEAR 4 FEET WAS RECENTLY REPORTED AT SHELL BEACH
LOUISIANA...AND A SURGE HEIGHT OF 2.4 FEET WAS REPORTED AT GRAND
ISLE LOUISIANA.