 The Joint Typhoon Warning Center (JTWC) added "monsoon depression" as a category in 2015, and Cyclone Komen is the first system recognised as a fully monsoon depression by JTWC.Since the monsoon trough is an area of convergence in the wind pattern, and an elongated area of low pressure at the surface, the trough focuses low level moisture and is defined by one or more elongated bands of thunderstorms when viewing satellite imagery.Its abrupt movement to the north between May and June is coincident with the beginning of the monsoon regime and rainy seasons across South and East Asia.