MEXICO CITY -- Hurricane Orlene lost some punch, but remained a dangerous Category 3 storm on Sunday as it headed toward Mexico's northwest Pacific coast between the tourist towns of Mazatlan and San Blas.

After growing into a hurricane Saturday, Orlene quickly added power, peaking as a Category 4 hurricane with maximum sustained winds of 130 miles per hour (215 kilometres per hour) early Sunday, according to the U.S. National Hurricane Center. But winds slipped back to 115 mph (185 km/h) by late Sunday.

The storm was moving over or near the Islas Marias, a former prison colony being developed as a tourist draw. The island is sparsely populated by government employees and buildings there are made of brick or concrete.

Orlene was forecast to hit Mexico's Pacific coast sometime Monday along a sparsely populated, lagoon-dotted stretch of mainland south of Mazatlan by late Monday.

By late Sunday, Orlene was centred about 80 miles (125 kilometres) west-northwest of Cabo Corrientes 鈥� a point of land that juts into the Pacific just south of Puerto Vallarta 鈥� and was headed north at 8 mph (13 km/h) early Sunday.

A hurricane warning was in effect from San Blas to Mazatlan.

The government of Jalisco state, where Puerto Vallarta is located, suspended classes Monday in towns and cities along the coast.

The state civil defence office posted video of large waves crashing on a dock at Cabo Corrientes.

In Sinaloa, where Mazatlan is located, some emergency shelters were opened.

The centre said the storm would likely begin weakening as its moved closer to land. But it was still projected to hit as a hurricane.

It could bring flood-inducing rainfall of up to 10 inches (25 centimetres) in some places, as well as coastal flooding and dangerous surf.

The ports of Manzanillo and Puerto Vallarta were closed to ships and Mexico's navy announced that ports including Mazatlan, San Blas and Nuevo Vallarta were closed to small craft.

Mexico's National Water Commission said Orlene could cause 鈥渕udslides, rising river and stream levels, and flooding in low-lying areas.鈥�

The hurricane center said hurricane-force winds extended out about 15 miles (30 kilometres) from the centre and tropical storm-force winds out to 70 miles (110 kilometres).