Answer:
Mid latitude cyclone are low pressure regional cyclone system formed in 30 to 55 N or S. In this region continental polar and tropical air masses collide to form fronts. Fronts are the boundary between two air masses. This front pushes the warm air to the north and cold air to the south and generating a clockwise rotation. Cyclone starts to form from southwest and reaches mature stage to form a well developed cold front and warm front.This cyclone become weak, both cold and warm front merge as occluded front, this causes the snow and poor weather condition in northeast US, same time southwest is the formation zone, so mild temperature.