Cooler waters caused Carlotta to gradually weaken, and on June 25 it degenerated into a remnant area of low pressure while located about 260 miles (420 km) west-southwest of Cabo San Lucas.

The system continued westward, and late on June 16 a low pressure area developed about 300 miles (480 km) southwest of San José, Costa Rica.

[2] Based on its organization, it is estimated the system developed into Tropical Depression Three-E late on June 18 while located about 270 miles (430 km) southeast of Puerto Angel, Oaxaca in Mexico.

The storm initially maintained a track toward the Mexican coastline, though a mid-level ridge turned it to the west; its closest point of approach was about 140 miles (230 km) at 1200 UTC on June 19.

[1] Late that day, a ragged banding-eye feature developed on satellite imagery, while at the same time it maintained an area of strong convection and well-defined outflow to its south.

[8] Early on June 22, northeasterly wind shear increased,[9] and shortly thereafter the weakening trend was temporarily halted with some oscillations in the convective intensity and eye definition.

[1] Outer rainbands and rough surf affected the southwestern coast of Mexico for an extended duration;[10] officials evacuated about 100 families in potentially flooded areas of Acapulco as a precaution.

[14] The Lithuanian freighter Linkuva, en route to Long Beach, California, encountered the waves and strong winds as the hurricane was undergoing its period of rapid intensification.