The sail and the storm hanna mina6/9/2023 As Hanna moved northeast across Alabama, it quickly weakened, dissipating on September 15. That same day, Hanna's second and final landfall occured near the Mississippi/Alabama border. Before making its first landfall in southeastern Louisiana on September 14, Hanna reached its peak intensity of 55 mph. Despite strong amounts of vertical wind shear, the strengthened into Tropical Storm Hanna that same day as it headed westward then northward. At 1200 UTC on September 12, the low had become organized enough to be classified as Tropical Depression Nine while located 250 miles south of Pensacola, Florida. ![]() After formation of the low, convection was weak until later on September 11, convection steadily deepened east of the upper-level low and surface low. During that period, a tropical wave moving in from the east merged with a trough and became a 1008 mb low pressure area. ![]() ![]() A trough of low pressure developed in the Gulf of Mexico in early September.
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