...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 7 AM EDT FRIDAY... * 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 7 AM EDT Friday, especially around the time of high tide. * IMPACTS...Low lying areas near Fletchers Boathouse begin to flood. Portions of Roosevelt Island are flooded. Water is expected to approach parts of the Hains Point Loop Road, but it will likely be closed. * ADDITIONAL DETAILS...Tides one and a half to two feet above normal. The next high tide at Washington Channel is at 5:20 AM. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. &&