Unsettled weather persists across the Northeast and Central U.S today......Hazardous heat possible across South Florida and South Texas this week......Significant flash flooding possible across portions of East Texas intothe Gulf States tomorrow and Friday...Several focused areas of stormy and unsettled weather can be expectedtoday across the central and eastern parts of the Lower 48 as a series offrontal systems gradually migrate eastward. Along the Eastern Seaboard,coastal low pressure loca...