Pilar had maximum sustained winds of 65 kph last night and its centre was about 155 kilometres south of Mazatlan. It was moving north at about 13 kph.
The storm was projected to stay close to land over the next few days while dropping rain on Nayarit and Sinaloa states while beginning to weaken. Tropical storm force winds extended out as far as 95 kilometres.
The US National Hurricane Centre said Pilar could to drop 3 to 7 inches (7.5 to 17.5 centimetres) of rain on coastal areas.
Maria, which battered Puerto Rico as a Category 4 hurricane last week, was down to a Category 2 storm and its maximum sustained winds had weakened to 150 kph late yesterday. It was moving north at 13 kph.
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Its centre was about 625 kilometres south-southeast of Cape Hatteras, North Carolina.
Farther out at sea, Hurricane Lee had maximum sustained winds of 150 kph.
It was projected to move in a rough circle over the coming days.