Hurricane Simon is crawling off Jalisco.

MANZANILLO, Mexico — Hurricane Simon crept northwest just off the Pacific coast early Monday, Reuters reported, with winds, rain, and flooding that put riverside towns on notice for evacuation. At 5 a.m. local time the National Hurricane Center placed the center about 50 miles west-southwest of Cabo Corrientes, in Jalisco. Maximum sustained winds were 115 miles an hour, a Category 3. The storm was moving northwest at 2 miles an hour. On that track it was expected to turn northeast and come inland across west-central Mexico around midweek.

The center warned of a dangerous storm surge near and east of where Simon approaches, and of large, destructive waves. Swells were forecast to make the surf and the rip currents life-threatening along the southwestern and west-central coast for several days. Authorities said flooding and mudslides were possible in the coastal mountains. The Puerto Vallarta airport had already suspended flights while the storm was still offshore.

Life-threatening flooding and mudslides are possible along the coast and in the mountains.

The photograph shows a wave breaking over a Pacific seawall, two people on the walk watching it. It is the coast, not a satellite frame. The Mexico desk files Simon. Isaias, already inland, is on the states page.