 By October 26, Rina significantly weakened due to increasing wind shear, and was downgraded to a Category 1 hurricane at 1800 UTC.The system moved generally toward the west-northwest and northwest on that day as it was steered around the periphery of the ridge.By 1200 UTC on October 27, the system was downgraded to a tropical storm while located about south-southeast of Tulum, Mexico.