On July 10, the NHC began issuing various warnings and watches, including a hurricane watch for the Louisiana coast from Cameron to the Mississippi River Delta, a tropical storm watch from the Mississippi Delta to the mouth of the Pearl River, and a storm surge watch from the mouth of the Pearl River to Morgan City, Louisiana.
After the disturbance became Tropical Storm Barry on July 11, the NHC issued a tropical storm warning from the mouth of the Pearl River to Morgan City, and a tropical storm watch eastward to the Mississippi/Alabama border, including the New Orleans metro area, Lake Pontchartrain, and Lake Maurepas.
The agency also issued a storm surge warning from the mouth of the Atchafalaya River to Shell Beach, Louisiana.

Due to United States Army Corps of Engineers fears that levees would be overtopped in Plaquemines Parish, Louisiana by storm surge atop elevated streams, a mandatory evacuation was ordered for the parish effective on the morning of July 11.
The evacuation order affected approximately 8,000–10,000 residents.
An evacuation order was also issued for low-lying areas of Jefferson Parish; the mayor of Grand Isle also issued a mandatory evacuation.
Due to the storm threat, the Carnival Valor changed its disembarking point from New Orleans to Mobile, Alabama.
Royal Dutch Shell evacuated non-essential personnel from its offshore oil platforms in the Gulf of Mexico.
On the afternoon of July 11, the National Hurricane Center issued a hurricane warning for coastal Louisiana between Intracoastal City to Grand Isle, Louisiana.
Curfews were enacted in several Louisiana communities across five parishes on July 12.
New Orleans mayor LaToya Cantrell urged residents to "shelter in place" but did not order evacuations, citing a Category 3 hurricane as the threshold.

Mississippi governor Phil Bryant declared a state of emergency on July 12, allocating state resources for storm relief and activating the state's emergency operations center.
The Mississippi Urban Search and Rescue Task Force dispatched two 12-person water rescue crews to Pike County and Camp Shelby to assist local emergency units.
On July 10, the NHC began issuing various warnings and watches, including a hurricane watch for the Louisiana coast from Cameron to the Mississippi River Delta, a tropical storm watch from the Mississippi Delta to the mouth of the Pearl River, and a storm surge watch from the mouth of the Pearl River to Morgan City, Louisiana. After the disturbance became Tropical Storm Barry on July 11, the NHC issued a tropical storm warning from the mouth of the Pearl River to Morgan City, and a tropical storm watch eastward to the Mississippi/Alabama border, including the New Orleans metro area, Lake Pontchartrain, and Lake Maurepas. The agency also issued a storm surge warning from the mouth of the Atchafalaya River to Shell Beach, Louisiana.
Due to United States Army Corps of Engineers fears that levees would be overtopped in Plaquemines Parish, Louisiana by storm surge atop elevated streams, a mandatory evacuation was ordered for the parish effective on the morning of July 11. The evacuation order affected approximately 8,000–10,000 residents. An evacuation order was also issued for low-lying areas of Jefferson Parish; the mayor of Grand Isle also issued a mandatory evacuation. Due to the storm threat, the Carnival Valor changed its disembarking point from New Orleans to Mobile, Alabama. Royal Dutch Shell evacuated non-essential personnel from its offshore oil platforms in the Gulf of Mexico. On the afternoon of July 11, the National Hurricane Center issued a hurricane warning for coastal Louisiana between Intracoastal City to Grand Isle, Louisiana. Curfews were enacted in several Louisiana communities across five parishes on July 12. New Orleans mayor LaToya Cantrell urged residents to "shelter in place" but did not order evacuations, citing a Category 3 hurricane as the threshold.
Mississippi governor Phil Bryant declared a state of emergency on July 12, allocating state resources for storm relief and activating the state's emergency operations center. The Mississippi Urban Search and Rescue Task Force dispatched two 12-person water rescue crews to Pike County and Camp Shelby to assist local emergency units.
Hurricane Barry (2019)