* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay north of Drum Point MD, Tidal Potomac from Cobb Island MD to Smith Point VA, Chester River to Queenstown MD, Eastern Bay, and Choptank River to Cambridge MD and the Little Choptank River. * WHEN. Until 2 AM EDT Wednesday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values up to 107 expected. * WHERE. Portions of central and north central Maryland and central, northern and northwest Virginia. * WHEN. From 11 AM to 8 PM EDT Wednesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur.

* WHAT. Heat index values around 105 expected. * WHERE. Portions of central, northeast, northern and southern Maryland, The District of Columbia and central and northern Virginia. * WHEN. From 11 AM to 8 PM EDT Wednesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur.

* WHAT. Heat index values up to 102 expected. * WHERE. In Maryland, Washington County. In Virginia, Shenandoah, Frederick VA, Page, Warren, Clarke Counties. In West Virginia, Morgan, Berkeley and Jefferson Counties. * WHEN. From 11 AM to 8 PM EDT Wednesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur.

* WHAT. Heat index values up to 102. * WHERE. Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon, Perry, and York Counties. * WHEN. Until 8 PM EDT Wednesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

SVRPHI The National Weather Service in Mount Holly NJ has issued a * Severe Thunderstorm Warning for. Northern Sussex County in southern Delaware. Southwestern New Castle County in northern Delaware. Kent County in central Delaware. Northeastern Talbot County in eastern Maryland. Eastern Queen Anne's County in northeastern Maryland. Caroline County in eastern Maryland. * Until 1215 AM EDT. * At 1108 PM EDT, severe thunderstorms were located along a line extending from near Smyrna to near Sandtown to Queen Anne, moving east at 35 mph. HAZARD. 60 mph wind gusts. SOURCE. Radar indicated. IMPACT. Damage to roofs, siding, trees, and power lines is possible. * Locations impacted include. Dover, Georgetown, Centerville, Smyrna, Milford, Denton, Centreville, Harrington, Camden, Clayton, Lewes, Milton, Bridgeville, Greensboro, Oakland, Ridgely, Cheswold, Church Hill, Sudlersville, and Ellendale.

SEVERE THUNDERSTORM WATCH 548, PREVIOUSLY IN EFFECT UNTIL 11 PM EDT THIS EVENING, IS NOW IN EFFECT UNTIL 1 AM EDT WEDNESDAY FOR THE FOLLOWING AREAS IN DELAWARE THIS WATCH INCLUDES 3 COUNTIES IN CENTRAL DELAWARE KENT IN NORTHERN DELAWARE NEW CASTLE IN SOUTHERN DELAWARE SUSSEX IN MARYLAND THIS WATCH INCLUDES 4 COUNTIES IN NORTHEAST MARYLAND CAROLINE KENT QUEEN ANNE'S TALBOT IN NEW JERSEY THIS WATCH INCLUDES 6 COUNTIES IN SOUTHERN NEW JERSEY ATLANTIC CAMDEN CAPE MAY CUMBERLAND GLOUCESTER SALEM THIS INCLUDES THE CITIES OF ATLANTIC CITY, CAMDEN, CENTREVILLE, CHERRY HILL, CHESTERTOWN, DENTON, DEPTFORD, DOVER, EASTON, GEORGETOWN, GLASSBORO, HAMMONTON, MILLVILLE, OCEAN CITY, PENNSVILLE, AND WILMINGTON.