Initially, a tropical upper tropospheric trough (TUTT) to the northwest inhibited convective development; however, "complex interactions" later ocurred between the TUTT cell, the initial disturbance, and a second disturbance, which resulted in favorable conditions for tropical cyclogenesis.
Initially, a tropical upper tropospheric trough (TUTT) to the northwest inhibited convective development; however, "complex interactions", according to Lt. Cdr. Nicholas D. Gural, later ocurred between the TUTT cell, the initial disturbance, and a second disturbance, which resulted in favorable conditions for tropical cyclogenesis.