 A weakly defined tropical wave moved off the northwest coast of Africa on September 20 , and crossed the northern portion of the tropical Atlantic and northern South America without significant organization . The wave moved into the northeastern Pacific waters , off the coast of Colombia on September 30 . As the wave passed over southern Central America , rainbands and cloudiness increased with the system between October 1 and October 3 , before the system merged with the ITCZ from October 4 to October 6 . Signs of convective organization <unk> on October 8 , and by October 9 , the system was upgraded to Tropical Depression Twenty Two @-@ E <unk> mi ( 930 km ) south of Cabo San Lucas , Mexico . 
