System 90W on April 29 at 05:11 UTC (1:11 a.m. EDT) and noticed that the storm's center of circulation is now undefined. Forecasters at the Joint Typhoon Warning Center estimate that storm's "center" is located near 10.9 North and 116.3 East, about 355 nautical miles southwest of Manila, Philippines.
The Atmospheric Infrared Sounder known as the AIRS instrument on the Aqua satellite showed deepening convection (rapidly rising air that forms clouds and thunderstorms) as the system moved closer to a mid-latitude trough (elongated area of low pressure). But that deepening or strengthening of convection is expected to be short lived because of the increasing winds battering the system.
The potential for System 90W to develop into a tropical cyclone has now dropped from "Fair" to "Poor" in the next 24 hours.