Climate and Climate Controls in West USA

Precipitation of the Western United States varies spatially because of the scattered smaller-scale climactic controls placed within larger-scale controls. The distribution of seasonal precipitation shows complex patterns in some areas. Winter and spring precipitation currently supplies most of the water to metropolitan areas; the amounts are important for agriculture and for ski industry.  During the summer and fall, changes in precipitation are less critical. Small fluctuations of precipitation can affect local water budgets, erosion, and the growth of grasses important for cattle raising.
Oregon's Climate can be classified as mild. Two major geographic features dominate the climate in the state: the Pacific Ocean and the Cascade Range. The mountains of the Cascade Range act as a division between western and eastern sides of Oregon. An oceanic climate or "marine west coast climate" is predominantly found in Western Oregon, and a much drier climate prevails east of Cascade Range/east of Oregon.
Climate Controls are important to beach and property erosion, flood probabilities, and estuarine water quality.
Climograph, in Eugene Oregon