 Though initially disorganized due to moderate wind shear, a subsequent decrease allowed for shower and thunderstorm activity to develop in earnest by October 14.While moving north-northwestward the following morning, Rafael intensified into a Category 1 hurricane.A cold front off the East Coast of the United States caused the system to turn northward and eventually northeastward by October 16, at which time Rafael attained its peak intensity with maximum sustained winds of 90 mph (150 km/h).