On September 9, about 16 hours before Florence made landfall, the National Hurricane Center issued a hurricane watch from Port Arthur, Texas to Pensacola, Florida. Three hours later, the watch was upgraded to a hurricane warning from Pensacola to Cameron, Louisiana, with a tropical storm warning issued from Pensacola eastward to Apalachicola, Florida. Around the time of Florence moving ashore, the National Hurricane Center limited the hurricane warning from Pensacola, Florida to Morgan City, Louisiana. Hours after the hurricane made landfall, the warning was replaced by a tropical storm warning from Mobile, Alabama to Grand Isle, Louisiana, which was discontinued two hours later.