Occluded Front Time of Year MET

For a warm occlusion, the cold air is behind the coldest air. This is most likely to occur in Britain when the land is relatively cold and the sea to the west is relatively warm. This will happen when the sea has been warmed for a long time but the land is able to cool rapidly: hence, warm occlusions occur in winter.

For a cold occlusion, the coldest air is behind the cold air. This is most likely to occur in Britain when the land is relatively warm and the sea to the west is relatively cool. This will happen when the sea has been cooling for a long time but the land is able to warm rapidly: hence, cold occlusions occur in summer.