Front- transition zone between two different air masses.
Cold Front- zone where cold, dry air is replacing warm moist air. The cold front is the
leading edge of the cloud air mass.
Warm Front- zone where warm, moist air replaces cold, dry air.
Precipitation associated with a warm front is generally much lighter than precipitation
associated with a cold front. In cold front, the warm air rises much faster over the cold air
than in warm fronts, so thunderstorms may form.
Stationary Front- boundary between two air masses that has no movement.
Cold fronts usually have stronger winds behind them so they move faster than warm
fronts.
Occluded Front (occlusion)- when a cold front catches up to and overtakes a warm front.
Warm air is squeezed between two areas of colder air, shoots up quickly and violently,
forming thunderstorms that can become severe.