Hurricane Sergio weakened as it drifted far off Mexico's Pacific coast Thursday, posing no immediate threat to land.

Sergio, the 10th hurricane of the year in the eastern Pacific, had maximum sustained winds of 100 mph, down from 110 mph on Wednesday, according to the U.S. National Hurricane Center in Miami. Forecasters didn't expect the category 2 hurricane to change much in strength over the next day.

Sergio was centered 430 miles southeast of the port city of Manzanillo and was moving north at 5 mph.

"We're still predicting that it is going to remain offshore of Mexico and parallel to the coast for the next two to four days," said forecaster Michelle Mainelli. She said Sergio was then expected to weaken to a tropical storm, but that was "still up in the air, so we're urging all residents to keep an eye on what develops."

Tropical storms become hurricanes when wind speeds reach 74 mph. Category 2 hurricanes have minimum wind speeds of 96 mph, while Category 3 hurricanes have minimum wind speeds of 111 mph.

Click here to track Sergio at the NOAA.