Cold Front, , Violent Thunderstorms at leading edge of front, Where a cold air mass replaces a warm air mass, Warm Front, , Gentle Rain Showers at leading edge of front, Where a warm air mass replaces a cold air mass, Stationary Front, , Light rain, fog or clouds for several days, Where a cold and warm air mass are stalled, Occluded Front, , Where a warm air mass is caught between two cold air masses.

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