A low-pressure system traversing the upper Great Lakes region will weaken, although rain showers will linger across parts of the Midwest and East.  A trailing disturbance will maintain unsettled, showery weather for the remainder of the week in parts of the central and eastern U.S.  However, rain should largely bypass the Gulf Coast region and the southern Atlantic States.  In the wake of the showery weather, cool air will spread southward.  During the weekend, widespread subfreezing temperatures will cover the northern Plains and upper Midwest, with readings below 32°F expected as far south as eastern Colorado and western Kansas. 

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