text: The enormous size of the depression made it fairly slow to develop , combined with some easterly wind shear in the eastern Atlantic and influence of the Saharan Air Layer to the north as it tracked south of the Cape Verde islands .
simplified: The large size of the depression made it fairly slow to develop , combined with some easterly wind shear in the eastern Atlantic and influence of the Saharan Air Layer to the north as it moved south of the Cape Verde islands .