The contact zone is called a cold front.
cold front
cold front
A warm front forms.
Stormy
a cold front
The contact zone is called a cold front.
A warm front is typically indicated in green on a weather map. This type of front forms when warm air moves into an area previously occupied by cooler air, bringing with it the potential for prolonged periods of light to moderate precipitation.
cold front
cold front
It forms a warm front. Along with this nimbostratus, altostratus, cirrostratus and cirrus clouds are formed.
A warm front forms.
A warm front forms.
A warm front forms.
Stormy
Stormy
a cold front