* 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.

The threat has ended.

The threat has ended.

THE NATIONAL WEATHER SERVICE HAS EXTENDED SEVERE THUNDERSTORM WATCH 438 TO INCLUDE THE FOLLOWING AREAS UNTIL 11 PM EDT THIS EVENING THIS WATCH INCLUDES THE FOLLOWING ADJACENT COASTAL WATERS BOSTON HARBOR COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK NATIONAL MARINE SANCTUARY

* 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.

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

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.

SVRBOX The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for. Northern Worcester County in central Massachusetts. Northwestern Middlesex County in northeastern Massachusetts. Eastern Franklin County in western Massachusetts. * Until 815 PM EDT. * At 718 PM EDT, a severe thunderstorm was located near Royalston, or 7 miles east of Orange, moving east at 30 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. Leominster, Fitchburg, Orange, Gardner, Athol, Pepperell, Groton, Winchendon, Lunenburg, Townsend, Lancaster, Templeton, Ayer, Westminster, Shirley, Harvard, Ashburnham, Hubbardston, Princeton, and Dunstable.

SVRBOX The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for. Northwestern Worcester County in central Massachusetts. East central Franklin County in western Massachusetts. * Until 815 PM EDT. * At 732 PM EDT, a severe thunderstorm was located over Sunderland, or 8 miles north of Amherst, 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, Deerfield, Athol, Montague, Sunderland, Northfield, Conway, Leverett, Erving, Shutesbury, Gill, Whately, Petersham, New Salem, Wendell, and Warwick.

At 744 PM EDT, a severe thunderstorm was located over Leverett, or 8 miles southeast of Greenfield, moving northeast at 15 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, Deerfield, Athol, Montague, Sunderland, Northfield, Leverett, Erving, Shutesbury, Gill, Petersham, New Salem, Wendell, and Warwick.

SVRBOX The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for. Essex County in northeastern Massachusetts. Northeastern Middlesex County in northeastern Massachusetts. * Until 845 PM EDT. * At 742 PM EDT, severe thunderstorms were located along a line extending from near Merrimac to near Salem to Dracut, moving east at 20 mph. HAZARD. 60 mph wind gusts. SOURCE. Radar indicated. IMPACT. Expect damage to roofs, siding, and trees. * Locations impacted include. Lowell, Lawrence, Haverhill, Methuen, Salem, Beverly, Andover, Dracut, Tewksbury, Gloucester, North Andover, Danvers, Newburyport, Amesbury, North Reading, Ipswich, Middleton, Salisbury, Georgetown, and Boxford.

At 737 PM EDT, a severe thunderstorm was located near Ashburnham, or near Fitchburg, moving east at 40 mph. HAZARD. 60 mph wind gusts. SOURCE. Radar indicated. IMPACT. Expect damage to roofs, siding, and trees. Locations impacted include. Leominster, Fitchburg, Orange, Gardner, Athol, Pepperell, Groton, Winchendon, Lunenburg, Townsend, Lancaster, Templeton, Ayer, Westminster, Shirley, Harvard, Ashburnham, Hubbardston, Princeton, and Dunstable.

THE NATIONAL WEATHER SERVICE HAS EXTENDED SEVERE THUNDERSTORM WATCH 438 TO INCLUDE THE FOLLOWING AREAS UNTIL 11 PM EDT THIS EVENING IN MASSACHUSETTS THIS WATCH INCLUDES 4 COUNTIES IN EASTERN MASSACHUSETTS NORFOLK SUFFOLK IN WESTERN MASSACHUSETTS HAMPDEN HAMPSHIRE THIS INCLUDES THE CITIES OF BOSTON, FOXBOROUGH, NORTHAMPTON, QUINCY, AND SPRINGFIELD.

SEVERE THUNDERSTORM WATCH 438, PREVIOUSLY IN EFFECT UNTIL 8 PM EDT THIS EVENING, IS NOW IN EFFECT UNTIL 11 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.