 Despite initial forecasts of several days over water, the center of circulation moved quickly northward in response to an upper-level low west of the system, and the bulk of Boris's deep convection moved ashore near Chiapas, Mexico around 0600 UTC on June 4.However, the cyclone's northward motion slowed, and the low-level circulation remained offshore, failing to ever make landfall.Thereafter, the system degenerated into a trough of low pressure about 80 mi (130 km) east-northeast of Salina Cruz, Mexico.