* WHAT. North winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to Smith Point VA, Tidal Potomac from Cobb Island MD to Smith Point VA, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. Until 8 AM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Up to one half foot of inundation above ground level in low-lying areas due to tidal flooding. * WHERE. Shoreline in Charles and King George Counties. * WHEN. Until 7 PM EDT Thursday, especially around the time of high tide. * IMPACTS. At 3.5 feet, water reaches yards near Cobb Island and docks near Dahlgren. * ADDITIONAL DETAILS. Tides one to one and a half feet above normal. High tide at Goose Bay is at 5:20 AM and 5:39 PM. High tide at Dahlgren is at 4:10 AM and 4:34 PM. High tide at Indian Head is at 9:14 AM and 9:33 PM.

* WHAT. Up to one half foot of inundation above ground level in low-lying areas due to tidal flooding. * WHERE. Shoreline in Anne Arundel County. * WHEN. Until 10 PM EDT Thursday, especially around the time of high tide. * IMPACTS. At 2.8 feet, flooding of some of the parking area near Dock Street in Annapolis may occur, with water surrounding the Alex Haley Memorial. * ADDITIONAL DETAILS. Tides one to one and a half feet above normal. High tide at Annapolis U.S. Naval Academy is at 6:27 AM and 7:14 PM.

* WHAT. Up to one foot of inundation above ground level in low- lying areas due to tidal flooding. * WHERE. Shoreline in the District of Columbia, Arlington County, and the City of Alexandria. * WHEN. Until midnight EDT Thursday night, especially around the time of high tide. * IMPACTS. Shoreline inundation is expected along portions of the seawall adjacent to Ohio Drive and the Hains Point Loop Road, and near the Tidal Basin and Jefferson Memorial. Water is expected to approach the curb near the intersection of King Street and Strand Street in Alexandria. * ADDITIONAL DETAILS. Tides one to one and a half feet above normal. High tide at Washington Channel is at 9:28 AM and 9:47 PM. High tide at Alexandria is at 9:46 AM and 10:05 PM.