on april 1, the japan meteorological agency (jma) and joint typhoon warning center (jtwc) began monitoring an area of low pressure associated with intermittent convection over the south china sea, roughly 535 km (335 mi) east-southeast of ho chi minh city, vietnam. the former of these two agencies immediately declared the system a tropical depression, the first of the 2011 season. following further development of the system, most notably convective banding around the low-level circulation center, the jtwc issued a tropical cyclone formation alert on the storm. early on april 2, the agency followed through with this alert and designated the low as tropical depression 01w. however, within hours of this, the depression became devoid of convection as wind shear buffeted the system. this prevented the cyclone from intensifying beyond depression status as it remained nearly stationary. failing to regain convection by april 3, the depression degenerated into a remnant low and the final advisory from the jtwc was issued. the jma continued to monitor the system as a tropical depression for another day before issuing their last warning on the system.