Tropical storm Dolores forms off Mexico's Pacific coast
Dolores, located 165 miles (265 km) southwest of the popular tourist resort of Acapulco, is heading northwest at 10 miles per hour (16 kmh), the Miami-based NHC said.
Dolores is blowing maximum sustained winds of 45 miles per hour, it added.
The CNH said it expected Dolores to become a hurricane by Monday. It is projected to move parallel along Mexico's Pacific coast.
(Reporting by Miguel Angel Gutierrez; Editing by Gareth Jones)