Hurricane Jova weakened slightly as the powerful Category 3 storm closed in on Mexico's Pacific coast, packing 120 mph winds.

"The center of the hurricane will be near the coast of Mexico in the hurricane warning area by Tuesday afternoon or evening,' the National Hurricane Center in Miami said.

Jova was about 155 miles southwest of the resort town of Manzanillo at 11 p.m. ET Monday, according to the center. It was moving north-northeast at about 7 mph.

Emergency officials opened shelters as Jova approached.