Heat and cold extremes are expected in the U.S. Extreme weather that ranged from triple digit temperatures in the Southwest to unseasonable cold in the Pacific Northwest has been forecast over the U.S. into the early part of the week. Forecasters say mushy late season snow is headed to the Rocky Mountains and severe thunderstorms are developing from the northern Plains to the upper Midwest. More rain is anticipated in southern Florida, even as flood waters continue to recede there after days of intense rainfall. A fresh batch of tropical moisture is forecast to reach the central Gulf Coast in several days and shift toward the Gulf Coast by Tuesday.
