* WHAT. Heat index values as high as 100 expected. * WHERE. All of western New York. * WHEN. Until 8 PM EDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat related illnesses to occur.

* WHAT. Heat index values of 100 to 104 degrees are expected at times this week with variability each day due to clouds and scattered showers and storms. * WHERE. Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. The prolonged nature of the heat may increase heat stress with time.

* WHAT. Heat index values of 100 to 104 degrees are expected at times this week with variability each day due to clouds and scattered showers and storms. * WHERE. Portions of north central, northeast, and northwest Ohio and northwest Pennsylvania. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses. The prolonged nature of the heat may increase heat stress with time.

SMWCLE The National Weather Service in Cleveland has issued a * Special Marine Warning for. Nearshore waters from Conneaut OH to Ripley NY. Open waters from Conneaut OH to Ripley NY. * Until 545 PM EDT. * At 344 PM EDT, strong thunderstorms were located along a line extending from 17 nm northwest of Ashtabula to near Geneva-On-The-Lake, moving northeast at 25 knots. HAZARD. Wind gusts to 40 knots and small hail. SOURCE. Radar. IMPACT. Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include. Erie.

* WHAT. Heat index values as high as 100. * WHERE. All of western New York. * WHEN. Until 8 PM EDT Thursday. * IMPACTS. Hot temperatures and high humidity may cause heat related illnesses to occur.

* WHAT. Heat index values up to 100. * WHERE. Central Pennsylvania. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values ranging from 100 to 105 degrees. * WHERE. Portions of east central Ohio, northwest, southwest, and western Pennsylvania, and northern and the northern panhandle of West Virginia. * WHEN. Until 8 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The New York State Department of Environmental Conservation at Albany has issued an Air Quality Health Advisory for Ground Level Ozone from 11 AM to 11 PM EDT Tuesday. Air quality levels in outdoor air are predicted to be greater than an Air Quality Index value of 101 for Ground Level Ozone. The Air Quality Index. or AQI. was created as an easy way to correlate levels of different pollutants to one scale. The higher the AQI value. the greater the health concern. When pollution levels are elevated. the New York State Department of Health recommends that individuals consider limiting strenuous outdoor physical activity to reduce the risk of adverse health effects. People who may be especially sensitive to the effects of elevated levels of pollutants include the very young and those with pre-existing respiratory problems such as asthma or heart disease. Those with symptoms should consider consulting their personal physician. For additional information, please visit the New York State Department of Environmental Conservation website at, https://on.ny.gov/nyaqi, or call the Air Quality Hotline at 1 800 5 3 5, 1 3 4 5.

An Air Quality Advisory for ground level ozone has been issued by the Northeast Ohio Areawide Coordinating Agency for Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina, Portage and Summit Counties. The advisory is from midnight tonight to midnight Tuesday night. Air quality levels will be unhealthy for sensitive groups during this period. If you are in the sensitive groups category of children, the elderly and those with breathing difficulties, please monitor your outdoor activity and check air quality readings at airnow.gov. Additionally, sign-up at enviroflash.info for text alerts regarding air quality. To help our region reduce air pollution: * Drive less: bike, walk, use transit, work from home, combine trips * Visit gohiocommute.com/noaca - Find a smarter way to travel! * Don't idle - Turn off your engine * Refill your tank after sunset * Wait to mow the lawn

An Air Quality Advisory for ground level ozone has been issued by the Northeast Ohio Areawide Coordinating Agency for Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina, Portage and Summit Counties. The advisory is from midnight tonight to midnight Tuesday night. Air quality levels will be unhealthy for sensitive groups during this period. If you are in the sensitive groups category of children, the elderly and those with breathing difficulties, please monitor your outdoor activity and check air quality readings at airnow.gov. Additionally, sign-up at enviroflash.info for text alerts regarding air quality. To help our region reduce air pollution: * Drive less: bike, walk, use transit, work from home, combine trips * Visit gohiocommute.com/noaca - Find a smarter way to travel! * Don't idle - Turn off your engine * Refill your tank after sunset * Wait to mow the lawn

SVRCLE The National Weather Service in Cleveland has issued a * Severe Thunderstorm Warning for. Northern Trumbull County in northeastern Ohio. Eastern Geauga County in northeastern Ohio. Ashtabula County in northeastern Ohio. Southwestern Erie County in northwestern Pennsylvania. Western Crawford County in northwestern Pennsylvania. * Until 500 PM EDT. * At 356 PM EDT, severe thunderstorms were located along a line extending from near Geneva-On-The-Lake to 7 miles northwest of Orwell to near Garrettsville, moving east at 25 mph. HAZARD. 60 mph wind gusts. SOURCE. Radar indicated. IMPACT. Expect damage to trees and power lines. * Locations impacted include. Erie, Ashtabula, Conneaut, Geneva-On-The-Lake, Cortland, Geneva, Girard, North Kingsville, Middlefield, Kinsman, North Bloomfield, Orwell, Albion, Andover, Linesville, West Farmington, Pymatuning Central, Bristolville, Pymatuning North, and Harmonsburg.

At 429 PM EDT, severe thunderstorms were located along a line extending from Ashtabula to 8 miles northwest of Andover to near Cortland, moving east at 25 mph. HAZARD. 60 mph wind gusts. SOURCE. Radar indicated. IMPACT. Expect damage to trees and power lines. Locations impacted include. Erie, Ashtabula, Conneaut, Cortland, Girard, North Kingsville, Middlefield, Kinsman, North Bloomfield, Orwell, Albion, Andover, Linesville, West Farmington, Pymatuning Central, Bristolville, Pymatuning North, Harmonsburg, Parkman, and Huntsburg.

* WHAT. Flooding caused by excessive rainfall is expected. * WHERE. A portion of northeast Ohio, including the following county, Ashtabula. * WHEN. Until 615 PM EDT. * IMPACTS. Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS. - At 310 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 0.5 and 1 inch of rain has fallen. - Additional rainfall amounts of 1 to 2.5 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include. Ashtabula, Conneaut, Geneva-On-The-Lake, Geneva, North Kingsville, Austinburg, Kingsville, Plymouth Center, Edgewood and Kelloggsville. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information