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The contribution of the wettest day per year to the annual total precipitation is expected to increase (5–30%) throughout the region. Regardless, Seattle’s precipitation has been logged there since 1945with records. Official precipitation totals for the city are measured at Sea-Tac Airport, which is actually located south of the Seattle city limits. San Joaquin 5 station precip index plot San Joaquin 5 station precipitation index water year plot. Monthly precipitation summary Monthly precipitation summary only (by hydrologic area.) Listing of monthly precip Listing of monthly precip data only (alphabetical order). These 100-year extremes can occur at any time in any Mediterranean location. Seattle averages 39.34 inches of precipitation a year, with the vast majority falling as rain instead of snow. Daily 24-hour rainfall totals for selected automatic-reporting rain gages. The 100-year extremes, derived with traditional extreme value approaches from the 1951–2000 simulations, underestimate the magnitude of these extreme events in the 2001–2100 projections by 30% for the drier areas of the Mediterranean (200–500 mm average annual rainfall) and by up to 20–30% for the wetter parts of the region. Despite the contrasting future trends, the 50-year daily precipitation extremes are projected to strongly increase (up to 100%) throughout the region. Our future projections indicate a strong north/south Mediterranean gradient, with significant, decreasing trends in the magnitude of daily precipitation extremes in the south and the Maghreb region (up to −10 mm/decade) and less profound, increasing trends in the north. We analyse the significance of trends for 1951–20–2100 under a ‘business-as-usual’ pathway (RCP8.5). We use an up-to-date ensemble of 33 regional climate simulations from the EURO-CORDEX initiative at 0.11° resolution. The objective of this study is to assess changes in annual rainfall extremes, total annual precipitation, and their relationship in the larger Mediterranean region. However, this is neither expected to be globally uniform nor is the relationship between temperature increase and rainfall intensities expected to be linear. Atlantic, and oceanic conditions influence the seasonal and annual totals of. Global warming is anticipated to intensify the hydrological cycle. Rainfall in the Lake District is strongly related to westerly air flows from the.