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Characteristics of Oregon coast winter storm events from 1981-1990

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  • The purpose of this paper is to identify significant storm events occurring over a ten year period along the Oregon coast. The findings will be used in a larger research framework to build an information base that looks into the role of climatic forcing on coastal erosion and sediment transport processes. The work involved analysis of climatic data for a ten year period (1981-1990) during the months of December, January, February and March. The climatic factors considered most relevant to characterizing storm activity on the Oregon coast were: wind direction, wind speed and precipitation. The data was collected from documents and computer records at weather stations in Astoria, Newport and Cape Blanco. Tables and graphs were produced following arithmetic calculations. The data was manipulated to show daily, monthly and yearly storm distribution. Storm occurrence was plotted by time and location. A relationship of greater storm frequency was observed with 1982-1983 ENSO climatic events. Results showed that the greatest storm magnitude was found during the winter of 1982-1983. The prevailing wind direction during most winter storms was southerly. In addition to the winter 1982-1983 storm period, two other major storm periods were identified over the ten year study period. January 1990 appeared to be a major storm period at all three stations. When the three stations were compared, Cape Blanco had the most intensive storm activity over the ten year period.
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