During the evening of September 25 a United States Air Force Hurricane Hunter aircraft found that the area of low pressure had developed into a tropical depression. The depression tracked slowly to the south and southwest into the Bay of Campeche. On September 26 convection increased and the depression was getting closer to being a tropical storm. At 0300 UTC September 27 the Government of Mexico issued a tropical storm watch for parts of the Mexican Gulf Coast as the depression was forecasted to strengthen into a tropical storm. Rapid intensification took place on September 27, and the depression became Tropical Storm Lorenzo around midday. Continued intensification that afternoon brought Lorenzo to near hurricane intensity. Early that evening, less than 7 hours after first being upgraded to a tropical storm, it was upgraded to Hurricane Lorenzo. It hit land on Mexico a little while after.