Slowly moving northwestward through Texas, Tropical Depression Erin managed to keep an area of convection near the center, with its widespread, but scattered rainbands dropping moderate to heavy precipitation. By August 17, the winds decreased to 20 mph (30 km/h), with higher gusts. The system turned to the north-northeast on August 18, while heavy bands of thunderstorms continued to spin around the center of Erin. Early on August 19 after entering Oklahoma, Erin suddenly re-intensified to maximum sustained winds of 50 mph (80 km/h) a short distance west of Oklahoma City. The Norman, Oklahoma National Weather Service remarked the intensification "[resulted] in what amounts to an inland tropical storm;" at 0930 UTC the system showed an eye-like feature and a spiral rainband, and produced wind gusts of over 80 mph (130 km/h). However, a few hours later, the system began weakening again, and late on August 19 Erin degenerated into a remnant low pressure area as the circulation dissipated over northeastern Oklahoma. The low continued into southeastern Kansas before dissipating, feeding moisture northward toward a frontal system extending from the Midwestern United States through the Mid-Atlantic States. Its remnant mid-level circulation then moved eastward across Missouri, Kentucky, and Virginia before losing identity as it moved out into the Atlantic Ocean.