Original: By the next morning, on August 27, the NHC issued a hurricane watch that included the New Orleans metro area, which was upgraded to a hurricane warning by 10:00 p.m. CDT that same evening.
Simplified: By the next morning, on August 27, the NHC gave out a hurricane watch that included the New Orleans metro area, which was upgraded to a hurricane warning by 10:00 p.m. CDT that same evening.