Simplify the following text for a Grade 14 native English-speaking person.
Original: As a certain amount of convection failed to exist , the National Hurricane Center discontinued advisories on Olga earlier on December 13 while located about 80 miles ( 130 km ) northwest of Kingston , Jamaica .
Simplified: As significant convection failed to persist , the National Hurricane Center discontinued advisories on Olga earlier on December 13 while located about 80 miles ( 130 km ) northwest of Kingston .