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<br />2 <br /> <br />1.1 Objectives <br /> <br />This study presents an analysis of three different orographic cloud <br /> <br />~ <br /> <br />systems which occurred during the winter months over the Park Range of <br /> <br />northwest Colorado and attempts to understand the differences and simi- <br /> <br />larities in light of the structure and motion of each accompanying <br /> <br />synoptic scale disturbance. <br /> <br />PRI}UffiY OBJECTIVES <br /> <br />Determine the principal mechanisms by which mountains and synoptic <br /> <br />weather systems interact to produce characteristic orographic cloud <br /> <br />systems. <br /> <br />~ <br />Analyze the synoptic, orographic, and convective components that <br /> <br />comprise an orographic cloud system and identify the important physical <br /> <br />processes which determine each. <br /> <br />~ <br /> <br />SECONDARY OBJECTIVES <br /> <br />~ <br /> <br />Develop analysis methods utilizing rawinsonde data taken in the <br /> <br />vicinity of the target barrier which can be used to describe the synop- <br /> <br />tic, orographic and convective components of continental, winter, oro- <br /> <br />graphic cloud systems. <br /> <br />Analyze the interrelationships between the various components of <br /> <br />the orographic cloud system. <br /> <br />Determine the degree of instability present within winter storm <br /> <br />systems as they impinge upon the northwestern Colorado Rockies. <br /> <br />~ <br /> <br />i <br />