By 10 p.m. CDT, the storm's maximum sustained winds were just 25 mph, the National Hurricane Center in Miami reported.

Marco came ashore shortly after noon as a compact storm. By 1 p.m. CDT, its winds had dropped from 50 mph to 40.

At 10 p.m. CDT, the storm was 70 miles south of Tuxpan and 100 miles west-northwest of Veracruz, moving westward at about 6 mph.

Pemex, Mexico's state-owned oil company, said 33 workers were evacuated from four oil platforms in the Gulf of Mexico, CNN reported. Pemex also temporarily closed six wells.