The U.S. National Hurricane Center in Miami said at 5 a.m. EDT Sunday that Hector was centered about 300 miles (480 kms) south of the southern tip of Baja California. Top sustained winds were clocked at 45 mph (75 kph) and the storm was moving west-northwest at 12 mph (19 kph).
Hours earlier, maximum winds were sustained at 40 mph (65 kph).
Forecasters say the storm could slowly strengthen somewhat in coming days as it continues to move farther out into the Eastern Pacific. The center says no coastal watches or warnings are in effect.
Hector became a tropical storm on Saturday.