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Rainy day in Capitol Hill, Seattle.Seattle experiences around 150 days with at least 0.01 inches (0.25 mm) precipitation each year. The climate of Seattle is temperate, classified in the warm-summer (in contrast to hot-summer) subtype of the Mediterranean zone by the most common climate classification (Köppen: Csb) [2] [3] [4] although some sources put the city in the oceanic zone (Trewartha ...
The historical average rainfall for the month of December is 5.72 inches in Seattle and 5.77 inches in Portland," explained AccuWeather Meteorologist Elizabeth Danco.
A major storm will continue to pummel areas from Washington to Oregon and Northern California with torrential rain, heavy mountain snow and high winds this week, AccuWeather meteorologists warn ...
The proximity of the Convergence Zone to the King-Snohomish County line is the reason that cities located just north or south of the line, which are located within the rain shadow of the Olympic Mountains, approach Seattle in annual precipitation. The effect of the Puget Sound Convergence Zone nearly offsets that of the rain shadow. [4]
Rain continues to fall in Southern California from an atmospheric river, raising the risk for additional mudslides with more than 120 reported so far in Los Angeles.
The prevailing westerly winds from the oceans also bring moisture, and the northern parts of the state generally receive higher annual rainfall amounts than the south. California's mountain ranges influence the climate as well: moisture-laden air from the west cools as it ascends the mountains, dropping moisture; some of the rainiest parts of ...
Average precipitation. The characteristics of United States rainfall climatology differ significantly across the United States and those under United States sovereignty. . Summer and early fall bring brief, but frequent thundershowers and tropical cyclones which create a wet summer and drier winter in the eastern Gulf and lower Eas
Another stormy week is expected for California as two atmospheric rivers hit the state late Friday through Wednesday, bringing more heavy rainfall to the region.