Complex sentence: The remnant low drifted south towards the Gulf of Mexico before being absorbed by a cold front (which also picked remnants of Subtropical Depression Twenty-two), which affected much of the Northeastern United States over the next few days.
Split into simpler sentences: The remnant low drifted south towards the Gulf of Mexico before being absorbed by a cold front (which also picked remnants of Subtropical Depression Twenty-two), and moving northeast. This cold front, of which Tammy's remnants were a part, affected much of the Northeastern United States over the next few days.