Complex sentence: Operationally, however, it was not recognized as such and assigned the name Carrie until 2200 UTC that day, when it was located approximately east of Cape Hatteras, North Carolina.
Split into simpler sentences: Operationally, however, it was not recognized as such until 2200 UTC that day, when it was assigned the name Carrie. At the time, it was located approximately east of Cape Hatteras, North Carolina.