 On the west side of a typical mid-latitude cyclone, there are northerly winds (N/H) or southerly winds (S/H) (associated with cold air) and east of the cyclone, southerly winds (N/H) or northerly winds (S/H) (associated with warm air); resulting in horizontal shear deformation.In the end, this results to concentrate a cyclonic shear along a line of maximum shear (which in this case is the birth of a cold front).On the eastern side of a cyclone, horizontal deformation is seen which turns into confluence (a result of translation + deformation).