Simplify the following text for a Grade 8 native English-speaking person.
Original: On October 5 , an operationally unnamed subtropical storm which had gone unnoticed by the NHC was absorbed by a temperate frontal low , which was moving to the southeast over the Azores . The low pressure system gained a more concentrated circulation and lost its frontal structure after absorbing the subtropical storm .
Simplified: On October 5 , a storm now known as the 2005 Azores subtropical storm was absorbed by another low pressure area .