Hurricane experts say Ivo's path is hard to predict - some indicators suggest it could dissipate while still at sea - others suggest it could hit Baja California as soon as Sunday.
Hurricane Ivo picked up some speed late Thursday as it curved toward Mexico's Pacific coast on path that could take it near Baja Califorina's resorts over the weekend.
The U.S. National Hurricane Center says Ivo, which was upgraded late Wednesday to a Category 1 hurricane, had sustained winds of about 80 mph, early Friday. It has been moving to the north-northwest at about 8 mph, up from 5 mph.
At 11 p.m. EDT, it was centered roughly 360 miles southwest of Cabo San Lucas at the tip of the Baja California peninsula. It was forecast to take a clockwise turn toward Baja.
The Hurricane Center said Ivo might weaken into a tropical storm and could hit land on Sunday. But it warns that any prediction of what its intensity might be over the weekend is "highly uncertain" and is urging people in the peninsula to closely monitor Ivo.
Authorities in Cabo San Lucas began advising residents to buy water and food. Emergency officers plan to meet Friday to assess Ivo's progression.
"Ivo's movement has been erratic and it has been changing its trajectory and as authorities we need to be prepared," said Cabo San Lucas Mayor Luis Armando Diaz.
The area was hit Sept. 4 by Hurricane Henriette, which killed 10 people, including two Japanese tourists, and destroyed about 2,000 homes.