Occluded Front

Where a warm air molecules get mashed between two cool air molecules making a high clouds. The air molecules join in the middle and may mix.

Warm front

A warm front is a front in which slow moving warm front collides with slow moving cold air pushing the cool air out.The warm air raises over the cool air making clouds and precipitation.

Stationary Front

A stationary front is a front in which both the warm and cold air are moving at the same speed collide. This makes a giant cloud right in the middle that collision that generally ends up in rain fall.

Cold Front

A cold front is when a collection of cold air that pushes warm air out of the system and makes precipitation. This does not always make precipitation but it makes it cold.Cold air collides with warm air in the opposite direction.