* WHAT. Up to one half foot of inundation above ground level expected in low lying areas due to tidal flooding. * WHERE. Shoreline in Anne Arundel County. * WHEN. From 11 PM this evening to 4 AM EDT Sunday, especially around the time of high tide. * IMPACTS. At 2.6 feet, water may begin to pond in the parking lot at Annapolis City Dock, and surround the Alex Haley Memorial. * ADDITIONAL DETAILS. Tides one to one and a half feet above normal. The next high tide at Annapolis U.S. Naval Academy is at 1:15 AM.

* WHAT. Heat index values up to 103 expected. * WHERE. Portions of northern Delaware, central and southern New Jersey, and southeast Pennsylvania. * WHEN. From 11 AM to 7 PM EDT Sunday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 107 expected. * WHERE. Caroline, Kent MD, Queen Annes, and Talbot Counties. * WHEN. From 10 AM to 7 PM EDT Sunday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. South winds 10 to 20 kt with gusts up to 25 kt. * WHERE. Chesapeake Bay north of Drum Point MD, Chester River to Queenstown MD, Eastern Bay, and Choptank River to Cambridge MD and the Little Choptank River. * WHEN. Until 6 AM EDT Sunday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds around 10 kt with gusts up to 20 kt. * WHERE. Tidal Potomac from Key Bridge to Indian Head MD. * WHEN. Until 9 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

THE NATIONAL WEATHER SERVICE HAS EXTENDED TORNADO WATCH 482 TO INCLUDE THE FOLLOWING AREAS UNTIL 8 PM EDT THIS EVENING IN PENNSYLVANIA THIS WATCH INCLUDES 7 COUNTIES IN CENTRAL PENNSYLVANIA ADAMS CUMBERLAND DAUPHIN LANCASTER LEBANON SCHUYLKILL YORK THIS INCLUDES THE CITIES OF CARLISLE, GETTYSBURG, HARRISBURG, HERSHEY, LANCASTER, LEBANON, POTTSVILLE, AND YORK.

TORNADO WATCH 482 REMAINS VALID UNTIL 8 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN PENNSYLVANIA THIS WATCH INCLUDES 18 COUNTIES IN CENTRAL PENNSYLVANIA ADAMS COLUMBIA CUMBERLAND DAUPHIN FRANKLIN FULTON HUNTINGDON JUNIATA LANCASTER LEBANON MIFFLIN MONTOUR NORTHUMBERLAND PERRY SCHUYLKILL SNYDER UNION YORK THIS INCLUDES THE CITIES OF BERWICK, BLOOMSBURG, CARLISLE, CHAMBERSBURG, DANVILLE, GETTYSBURG, HARRISBURG, HERSHEY, HUNTINGDON, LANCASTER, LEBANON, LEWISBURG, LEWISTOWN, MCCONNELLSBURG, MIFFLINTOWN, MOUNT UNION, NEWPORT, POTTSVILLE, SELINSGROVE, SHAMOKIN, SUNBURY, WAYNESBORO, AND YORK.