Cold,warm,stationary,& occluded.

Cold fronts~Stationary fronts

A cold front forms when a cold air mass replaces a warm.A cold front is one of the most deadly fronts.Another thing is the temperature and characteristics behind a cold front is different from in front of it.

A Stationary front is when a pair of air masses are jot strong enough to push one another And causes a storm right in the middle of the two air masses.

Warm fronts~Occluded fronts

A warm front is basically the opposite of a cold front,A cold front is when a cold air mass is replacing a warm air mass.A warm front,a warm air mass is replacing the cold air mass and after that its all the same.

An occluded front occurs when a cold front over takes a warm front.After this happens the air spreads apart.