The domineering pattern of dry weather, abundant sunshine and unusual warmth across the central and eastern United States will soon come to an end, with AccuWeather forecasters predicting a major shift in the weather pattern later this week. The dry and unseasonably mild conditions across parts of the Great Lakes and Ohio Valley will be replaced by a damp and cooler pattern. The significant shift in the weather across the Midwest and Northeast will be caused by cold air plunging southward from C