Coastal Flood Advisory

* WHAT...Up to one half foot of inundation above ground level in low-lying areas near shorelines and tidal waterways (4.9 to 5.1 feet Mean Lower Low Water).

* WHERE...Nantucket MA County.

* WHEN...Until 2 AM EDT Tuesday. The high tide cycles tonight and Monday night are of the most concern.

* IMPACTS...Roads remain passable. Low lying areas and roads near Nantucket Harbor, including Easy Street, may experience pockets of shallow flooding less than one foot deep.