 Under the influence of a strong westward-moving subtropical ridge to its north, the disturbance tracked nearly due westward, with deep convection in the region increasing and decreasing on a daily basis.It slowly became better organized, and early on August 20 the disturbance developed into Tropical Depression One-C while located about south of Honolulu, Hawaii.At the time, there was no convection associated with the ITCZ within 10° Longitude.