 That night, Dvorak classifications were initiated on the system while it was just west of Costa Rica, and it moved west-northwestward at 10–15 mph (15–25 km/h).Conditions appeared favorable for further development, and convection increased late on August 26 over the area of low pressure.Early on August 27, the system became much better organized about 250 miles (400 km) south-southwest of Guatemala, although convection remained minimal.