Complex sentence: Twelve hours later, the system degenerated into a remnant low-pressure area devoid of any thunderstorm activity; these remnants persisted for a day as they tracked north-northwestward, eventually dissipating 70 mi (110 km) south-southwest of Bahía Asunción.
Split into simpler sentences: Twelve hours later, the system degenerated into a residual low pressure area devoid of any thunderstorm activity. The remnants persisted for a day as they tracked north-northwestward, eventually dissipating 70 mi (110 km) south-southwest of Bahía Asunción.