* WHAT. Heat index values up to 96. * WHERE. Northern Middlesex and Northern New London Counties. * WHEN. Until 8 PM EDT Sunday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The areas affected include. Narragansett Bay. Rhode Island Sound. At 514 PM EDT, Doppler radar indicated strong thunderstorms, capable of producing winds to around 30 knots. These thunderstorms were located along a line extending from Providence to near South Kingstown, moving southeast at 20 knots. Locations impacted include. Dutch Harbor Light, Sakonnet Point Light, Mount Hope Bay, Castle Hill Light, Narragansett Bay, Quonset Point, Melville, Greenwich Bay, Popasquash Point, Warwick Light, Bristol Harbor, Plum Beach Light, Conimicut Light, and Sachuest Point.

* WHAT. Heat index values up to 96. * WHERE. Northern Middlesex and Northern New London Counties. * WHEN. Until 8 PM EDT Sunday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Southwest winds 10 to 20 kt with gusts up to 25 kt and waves 3 to 5 feet expected. * WHERE. Narragansett Bay. * WHEN. From 10 AM Sunday to 9 AM EDT Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 2 feet expected. * WHERE. Boston Harbor. * WHEN. From noon to 8 PM EDT Sunday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Heat index values up to 99. * WHERE. In Connecticut, Hartford CT, Tolland CT, and Windham CT Counties. In Massachusetts, Eastern Hampden MA and Eastern Hampshire MA Counties. * WHEN. Until 7 PM EDT Sunday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.