* WHAT. Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE. Shoreline in the District of Columbia. * WHEN. Until 5 PM EDT this afternoon, 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. * ADDITIONAL DETAILS. Tides one to one and a half feet above normal. The next high tide at Washington Channel is at 2:44 PM.

* WHAT. North winds 10 to 20 kt with gusts up to 25 kt. * WHERE. Chesapeake Bay main channel north of Smith Point VA, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Tangier Sound and the inland waters surrounding Bloodsworth Island. * WHEN. Until 6 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. North winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Tidal Potomac from Key Bridge to Indian Head MD. * WHEN. From 8 AM to 6 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the first Small Craft Advisory, northeast winds 10 to 15 kt with gusts up to 20 kt. For the second Small Craft Advisory, north winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Tidal Potomac from Indian Head to Cobb Island MD, Patapsco River including Baltimore Harbor and Patuxent River to Broomes Island MD. * WHEN. For the first Small Craft Advisory, until 6 PM EDT this evening. For the second Small Craft Advisory, from 8 AM to 6 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.