The strong systems which has been affecting the Pacific Northwest are greatly enhanced by remnants of hurricanes moisture advected by cold fronts which are originated over Alaska. The origins of strong Pacific Northwest storms are rarely discussed about. Most weather reports omits the cold front’s advection of moisture from former hurricanes over the tropical Pacific, especially the far East Pacific ocean hurricanes. That’s the reason of the abundant moisture at the Pacific Northwest. Cold dry air holds less moisture than warm humid air.