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<br />. ,.:,:''''- r')' ~ S <br />',- - .... ..:.- <br /> <br />. <br /> <br />. <br /> <br />2. Climate <br /> <br />The climate within the study area is dominated by Pacific <br /> <br />I <br /> <br />frontal systems and local thunderstorms. <br /> <br />Precipitation varies from 25 inches per year in the vicinity <br /> <br /> <br />of Commissary Park upwards to 45+ inches per year a top <br /> <br /> <br />Black Mountain and at the headwaters of the Main and West <br /> <br />Forks. Depending upon elevation, 55% to 75% of this <br />precipitation is in the form of snow. Snow can be expected <br />anytime after Labor Day and will usually remain on the study <br /> <br />area until late May. Mid-winter snow accumulations ave~age <br /> <br />six to seven feet in depth. <br /> <br />The mean annual temperature averages 33-45 degrees (F) with <br /> <br />temperature extremes ranging from -45 degrees (F) to 90 degrees <br /> <br />(F) . <br /> <br />The dominant wind directions are from the southwest, west and <br /> <br />northwest. The Continental Divide and other high north-south <br /> <br />ridges protect the study area from extremely high winds. <br />