Fog When the clouds suck up the water from seas, rivers, lakes. etc, they make the clouds heavy. If the clouds do not start raining, there will be fog. Definition: Fog is thick mist that is difficult to see through.
Low clouds are no higher than 2000 meters. Clouds which belong to this group include stratus clouds, nimbostratus clouds, and stratocumulus clouds. Varying amounts of precipitation are associated with these clouds.
stratus clouds are the lowest clouds but cumulus clouds are the white fluffy ones cumulus clouds turn into cumbulimbous clouds when filled but with rain. The only problem is cumulus clouds are not found low!