* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, Eastern Bay, and Choptank River to Cambridge MD and the Little Choptank River. * WHEN. From 2 PM this afternoon to 2 AM EDT Sunday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values between 105 to 110 expected. * WHERE. Portions of central, north central, northeast, northern and southern Maryland, The District of Columbia and central, northern and northwest Virginia. * WHEN. From 11 AM to 8 PM EDT today. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS. Oppressive heat and humidity will overspread the area today and last into Sunday. Little relief from the heat is expected tonight with low temperatures in the mid 70s to near 80 for most, which will compound heat stress on those without air conditioning.

* WHAT. For the Heat Advisory, heat index values up to 102. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 110 expected. * WHERE. Portions of northern Delaware, New Jersey, and southeast Pennsylvania. * WHEN. For the Heat Advisory, until 6 AM EDT Sunday. For the Excessive Heat Warning, from 6 AM to 8 PM EDT Sunday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 107 expected. * WHERE. Portions of central and southern Delaware, northeast Maryland, and southern New Jersey. * WHEN. From 6 AM to 8 PM EDT Sunday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Patuxent River to Broomes Island MD. * WHEN. From 2 PM this afternoon to 2 AM EDT Sunday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, Eastern Bay, Choptank River to Cambridge MD and the Little Choptank River, and Patuxent River to Broomes Island MD. * WHEN. From 2 PM this afternoon to 2 AM EDT Sunday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values up to 108 expected. * WHERE. Portions of central and southern Delaware, northeast Maryland, and southern New Jersey. * WHEN. From 6 AM to 8 PM EDT Sunday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. For the Heat Advisory, heat index values up to 103. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 107 expected. * WHERE. Portions of northern Delaware, New Jersey, and southeast Pennsylvania. * WHEN. For the Heat Advisory, until 6 AM EDT Sunday. For the Excessive Heat Warning, from 6 AM to 8 PM EDT Sunday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 108 expected. * WHERE. Portions of central,northeast, and southern Maryland, The District of Columbia, and central and northern Virginia. * WHEN. From 11 AM this morning to 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses to occur. * ADDITIONAL DETAILS. Oppressive heat and humidity will overspread the area today and last into Sunday. Little relief from the heat is expected tonight with low temperatures in the mid 70s to lower 80s, which will compound heat stress on those without air conditioning.

* WHAT. Southwest winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 7 ft expected. * WHERE. Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm, Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm, Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm and Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm. * WHEN. From 8 AM Sunday to 6 AM EDT Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 15 to 25 kt with gusts up to 30 kt and seas 3 to 6 ft expected. * WHERE. Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm and Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm. * WHEN. From 8 AM Sunday to 6 AM EDT Monday. * IMPACTS. Conditions will be hazardous to small craft.

The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Saturday for the Baltimore City Metro and Annapolis region. 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 the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx.

The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Saturday for Northeast Maryland. 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 the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx.

The Delaware Valley Regional Planning Commission has issued a code orange air quality alert Saturday for The Philadelphia Metro area. 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 http://www.phila.gov/health/units/ams/

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Saturday for Salem and Cumberland Counties. 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 http://www.state.nj.us/dep/

The New Jersey Department of Environmental Protection has issued a code orange air quality alert Saturday for Southwestern New Jersey. 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 http://www.state.nj.us/dep/