How strong is Hurricane Polo? Only one Pacific storm was more intense

The storm rapidly intensified off Mexico's southwestern coast Tuesday, reaching Category 5 winds of 180 mph and a central pressure of 892 millibars, according to the National Hurricane Center.

That made it the basin's second-most intense storm by that measure.

Only Hurricane Patricia, in 2015, was stronger, with a central pressure of 872 millibars and maximum sustained winds of 215 mph.

Polo weakened slightly to a Category 4 hurricane early Wednesday. It was about 160 miles south of Zihuatanejo, a resort city on Mexico's Pacific coast, Wednesday morning, with winds of 150 mph.