* WHAT. Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (2.3 to 12.7 feet Mean Lower Low Water). * WHERE. Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA, Dukes MA and Nantucket MA Counties. * WHEN. Until 2 AM EDT Wednesday. * IMPACTS. Roads remain passable. Shallow pockets of flooding less than one foot deep affect more vulnerable coastal roads along the North Shore from Salem and Gloucester to Newburyport. Rough surf will likely cause some splashover onto coastal roads around the time of high tide.