* WHAT. Heat index values up to 102. * WHERE. Portions of central, eastern, northeastern, southeastern, and western Massachusetts and northern Rhode Island. * WHEN. Until 7 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 102. * WHERE. In Connecticut, Hartford CT, Tolland CT, and Windham CT Counties. In Massachusetts, Eastern Hampden MA, Eastern Hampshire MA, Western Hampden MA, and Western Hampshire MA Counties. * WHEN. Until 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 100. * WHERE. Northern Middlesex and Northern New London Counties. * WHEN. Until 8 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 95. * WHERE. Northern Middlesex and Northern New London Counties. * WHEN. Until 6 PM EDT Saturday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 104 this afternoon and between 95 and 100 degrees. * WHERE. In Connecticut, Hartford CT, Tolland CT, and Windham CT Counties. In Massachusetts, Eastern Hampden MA, Eastern Hampshire MA, Western Hampden MA, and Western Hampshire MA Counties. * WHEN. Until 7 PM EDT Friday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 104. * WHERE. Portions of central, eastern, northeastern, southeastern, and western Massachusetts and northern Rhode Island. * WHEN. Until 7 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerously hot conditions with heat index values up to 105 expected. * WHERE. Portions of south central, southwest, and western Maine and central, northern, and southern New Hampshire. * WHEN. From 11 AM this morning to 7 PM EDT this evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. Heat index values up to 100 expected. * WHERE. In Maine, Southern Somerset and Southern Franklin Counties. In New Hampshire, Sullivan, Northern Carroll, Northern Grafton, Southern Coos, Southern Grafton, and Cheshire Counties. * WHEN. From 11 AM this morning to 7 PM EDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The Connecticut Department of Environmental Protection has issued an Air Quality Action Day for Ground Level Ozone, from 11 AM to 11 PM EDT Thursday. An Air Quality Action day means that Ground Level Ozone concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection website at: https://portal.ct.gov/deep

The Rhode Island Department of Environmental Management has issued an Air Quality Action Day for Ground Level Ozone, from 11 AM to 11 PM EDT Thursday. An Air Quality Action day means that Ground Level Ozone concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Rhode Island Department of Environmental Management website at: https://dem.ri.gov/

The Massachusetts Department of Environmental Protection has issued an Air Quality Alert for Ground Level Ozone, from 11 AM to 11 PM EDT Thursday. An Air Quality Alert means that Ground Level Ozone concentrations within the region may approach or exceed levels that are Unhealthy for Sensitive Groups. Air is unhealthy for sensitive children and adults, such as those with asthma, lung or heart disease, and older adults. Sensitive children and adults should limit prolonged outdoor activity. For additional information, please visit the Massachusetts Department of Environmental Protection website at: https://mass.gov/orgs/massachusetts-department-of-environmental- protection

SVRBOX The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for. Northeastern Franklin County in western Massachusetts. * Until 415 PM EDT. * At 312 PM EDT, a severe thunderstorm was located over Bernardston, or 7 miles northeast of Greenfield, moving east at 10 mph. HAZARD. 60 mph wind gusts and quarter size hail. SOURCE. Radar indicated. IMPACT. Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include. Orange, Northfield, Bernardston, Erving, Gill, Wendell, Warwick, and Leyden.

SVRBOX The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for. East central Franklin County in western Massachusetts. * Until 430 PM EDT. * At 323 PM EDT, a severe thunderstorm was located over Deerfield, or near Greenfield, and is nearly stationary. HAZARD. 60 mph wind gusts and quarter size hail. SOURCE. Radar indicated. IMPACT. Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include. Greenfield, Orange, Deerfield, Montague, Sunderland, Northfield, Conway, Shelburne, Leverett, Erving, Shutesbury, Gill, Whately, New Salem, and Wendell.

At 338 PM EDT, a severe thunderstorm was located over Deerfield, or near Greenfield, and is nearly stationary. HAZARD. 60 mph wind gusts and quarter size hail. SOURCE. Radar indicated. IMPACT. Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include. Greenfield, Orange, Deerfield, Montague, Sunderland, Northfield, Conway, Shelburne, Leverett, Erving, Gill, New Salem, and Wendell.

At 353 PM EDT, a severe thunderstorm was located over Montague, or near Greenfield, moving east at 20 mph. HAZARD. 60 mph wind gusts and quarter size hail. SOURCE. Radar indicated. IMPACT. Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include. Greenfield, Orange, Deerfield, Montague, Northfield, Erving, Gill, New Salem, and Wendell.

At 335 PM EDT, a severe thunderstorm was located over Bernardston, or 8 miles northeast of Greenfield, moving east at 20 mph. HAZARD. 60 mph wind gusts and quarter size hail. SOURCE. Radar indicated. IMPACT. Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include. Orange, Northfield, Bernardston, Erving, Gill, and Warwick.

FFWBOX The National Weather Service in Norton has issued a * Flash Flood Warning for. Northeastern Franklin County in western Massachusetts. * Until 645 PM EDT. * At 338 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD. Flash flooding caused by thunderstorms. SOURCE. Radar. IMPACT. Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include. Orange, Northfield, Bernardston, Colrain, Gill, Warwick and Leyden.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 438 IN EFFECT UNTIL 8 PM EDT THIS EVENING FOR THE FOLLOWING AREAS IN MASSACHUSETTS THIS WATCH INCLUDES 4 COUNTIES IN CENTRAL MASSACHUSETTS WORCESTER IN EASTERN MASSACHUSETTS MIDDLESEX IN NORTHEASTERN MASSACHUSETTS ESSEX IN WESTERN MASSACHUSETTS FRANKLIN THIS INCLUDES THE CITIES OF FITCHBURG, FRAMINGHAM, GLOUCESTER, GREENFIELD, LAWRENCE, LOWELL, AND WORCESTER.