A few easterly wind gusts of 20 to 25 knots are possible through early this evening as a front crosses the waters. In addition, widely scattered thunderstorms may produce occasional lightning strikes, locally higher waves, and reduced visibility in rain. Mariners should exercise extra caution if navigating the waters during this time.

The Pennsylvania Department of Environmental Protection has issued a Code ORANGE Air Quality Alert for Cumberland, Dauphin, Lancaster, Lebanon, and York Counties in the Susquehanna Valley, through this evening. A Code ORANGE Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases, and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles, visit www.aqpartners.state.pa.us and www.airnow.gov.

* WHAT. Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. * WHERE. In Delaware, Kent, Inland Sussex and Delaware Beaches. In New Jersey, Cumberland, Cape May and Atlantic Coastal Cape May. * WHEN. From 5 PM this afternoon to 11 PM EDT this evening. * IMPACTS. At this level, flooding begins on the most vulnerable roads in coastal and bayside communities, and along inland tidal waterways. Some partial or full road closures are possible.

* WHAT. Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways. * WHERE. In Delaware, New Castle. In New Jersey, Salem. * WHEN. From 8 PM this evening to midnight EDT tonight. * IMPACTS. At this level, flooding begins on the most vulnerable roads along tidal waterways. Some partial or full road closures are possible.