1986 Pacific hurricane season
Nicaragua.  During the early afternoon of the 15th, ship reports indicated the formation of a tropical depression near 10.2N 92.7W.  The cyclone moved at a quick pace to the west- northwest south of a warm-core ridge.  Early on the morning of the 16th, Roslyn became a tropical storm.  By the morning of the October 17, it had developed into a hurricane south of Acapulco.