200 m. height. Where this layer hits one of the higher islands it is forced upwards. Main precipitation in highlands due to condensation of water vapor caught in clouds. Northern side of island in rainshadow of south. Less humidity on the northern sides of the islands.
Vegetation zones reach higher in the northern side than on the south.
Island of Santiago in the rainshadow of Santa Cruz. Cumulus clouds formed by normal convection in Bay of Panama are driven to the Galapagos by the North East Trade winds. Main precipitation in the coastal areas of the northern sides of the islands. ITCZ wanders North or South according to the prevailing wind system.