Mexico issued a tropical storm warning along its Pacific coastline Thursday as Tropical Storm Kiko marched toward land.

The storm had maximum sustained winds of 40 mph (65 kph) and was located 240 kilometers (150 miles) southwest of the resort of Zihuatanejo. It was moving north at 15 kph (9 mph), and was expected to veer sharply toward the northwest early Friday and skim Mexico's southwest Pacific coastline.

Forecasters said it would likely strengthen, although they didn't expect it to become a hurricane before scraping land, probably near the port of Manzanillo on Sunday.

The tropical storm warning was issued from Zihuatanejo to Manzanillo.

The storm had been downgraded to a tropical depression late Tuesday before regaining tropical storm status Wednesday.