"From Depression to Hurricane: The Transformation of Tropical Storm Katia"

Tropical Depression Katia has strengthened into Tropical Storm Katia, located 580 miles northwest of The Cabo Verde Islands. It is moving towards the north-northwest at 13 mph with maximum sustained winds of 40 mph. The storm is expected to weaken and could become a remnant low by Sunday evening. There are currently no coastal watches or warnings in effect.