The US National Hurricane Centre says Pilar had maximum sustained winds of 75 kph early today and it was located about 95-km south of Cabo Corrientes, the tip of land at one end of the bay where Puerto Vallarta is situated.
The storm was moving north-northwest at about 10 kph.
The storm is projected to stay very close to the coast for the next few days without gaining hurricane force.
The Hurricane Centre says it's likely to bring 3 to 7 inches of rain to the coastal region.
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