Complex sentence: Despite the conditions, the NHC ceased monitoring the system early on September 3; however, the low became better organized and it was given a "medium" chance of becoming a tropical depression within 48 hours later that day.
Split into simpler sentences: Despite the conditions, the NHC ceased monitoring the system early on September 3. However, the low became better organized and it was given a "medium" chance of becoming a tropical depression within 48 hours later that day.