* WHAT. Southwest winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, and Eastern Bay. * WHEN. From midnight tonight to 6 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds around 10 kt with gusts up to 20 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, and Patuxent River to Broomes Island MD. * WHEN. From 10 AM to 6 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values around 105 expected. * WHERE. Washington DC, and portions of central, northern, and southern Maryland, and central and northern Virginia. * WHEN. From 11 AM to 8 PM EDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Southwest winds around 10 kt with gusts up to 20 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, and Patuxent River to Broomes Island MD. * WHEN. From 10 AM to 6 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, and Eastern Bay. * WHEN. From midnight tonight to 6 PM EDT Thursday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds around 10 kt with gusts up to 20 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, and Patuxent River to Broomes Island MD. * WHEN. From 10 AM this morning to 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 20 kt. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, and Eastern Bay. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values around 105 expected. * WHERE. Washington DC, and portions of central, northern, and southern Maryland, and central and northern Virginia. * WHEN. From 11 AM to 8 PM EDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 105 expected. * WHERE. Portions of DC, central, northeast, northern, and southern Maryland, 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.

* WHAT. Southwest winds around 10 kt with gusts up to 20 kt expected. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, and Patuxent River to Broomes Island MD. * WHEN. From 10 AM this morning to 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds 10 to 15 kt with gusts up to 20 kt. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, and Eastern Bay. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values around 105 expected. * WHERE. Portions of DC, central, northeast, northern, and southern Maryland, and central and northern Virginia. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 100 expected. * WHERE. In Maryland, Washington County. In Virginia, Clarke, Frederick VA, and Warren Counties. In West Virginia, Berkeley, Jefferson, and Morgan Counties. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 105 expected. * WHERE. Portions of central, north central, and northern Maryland and northern Virginia. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 100 expected. * WHERE. In Maryland, Washington County. In Virginia, Clarke, Frederick VA, and Warren Counties. In West Virginia, Berkeley, Jefferson, and Morgan Counties. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 105 expected. * WHERE. Portions of central, north central, and northern Maryland and northern Virginia. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 105 expected. * WHERE. Portions of DC, central, northeast, northern, and southern Maryland, and central and northern Virginia. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Southwest winds around 10 to 15 kt with gusts up to 20 kt. * WHERE. Chesapeake Bay from Pooles Island MD to North Beach MD, and Eastern Bay. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Southwest winds around 10 to 15 kt with gusts up to 20 kt. * WHERE. Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, and Patuxent River to Broomes Island MD. * WHEN. Until 6 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values up to 104 expected. * WHERE. Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon, Perry, and York Counties. * WHEN. From 11 AM this morning to 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Flooding caused by excessive rainfall continues. * WHERE. A portion of northern Virginia, including the following county, Prince William. * WHEN. Until 800 PM EDT. * IMPACTS. Fleetwood Drive will be closed. Other low lying areas along Cedar Run and its tributaries may be flooded. * ADDITIONAL DETAILS. - At 223 PM EDT, gauge reports indicated heavy rain due to flooding along Cedar Run. - Flooding impacts will continue, but no additional rainfall is expected. - Some locations that will experience flooding include. Manassas. Nokesville. Aden. - Cedar Run near Aden is cresting near 12.1 feet and will begin falling this evening. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information.