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Home Return to list Heat Advisory 0001 Issued by the Boston Forecast Office
Action: New Issued At: 2026-05-18 11:57:18 870 WWUS71 KBOX 181657 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 1257 PM EDT Mon May 18 2026 CTZ002>004-MAZ003>007-010>019-026-RIZ001>004-191100- /O.NEW.KBOX.HT.Y.0001.260519T1500Z-260521T0000Z/ Hartford CT-Tolland CT-Windham CT-Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-Western Essex MA-Eastern Essex MA-Eastern Hampshire MA-Eastern Hampden MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-Northern Middlesex MA-Northwest Providence RI- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Including the cities of Plymouth, Northampton, Foster, Providence, Warwick, Willimantic, West Greenwich, Springfield, Amherst, Greenfield, Lowell, Boston, Fitchburg, Union, Barre, Taunton, Ayer, Worcester, Orange, Putnam, Norwood, Cambridge, Smithfield, Brockton, Lawrence, Quincy, Milford, Vernon, Hartford, Framingham, East Greenwich, Windsor Locks, Gloucester, Foxborough, Coventry, and West Warwick 1257 PM EDT Mon May 18 2026 ...HEAT ADVISORY IN EFFECT FROM 11 AM TUESDAY TO 8 PM EDT WEDNESDAY... * WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM Tuesday to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses. * ADDITIONAL DETAILS...This is the first multi-day period of hot temperatures. Those not yet accustomed to hot temperatures with a moderate degree of humidity should take appropriate heat-related precautions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives, neighbors and pets. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ Visit us at http://www.weather.gov/box Loconto Action: Continued Issued At: 2026-05-19 00:59:14 249 WWUS71 KBOX 190559 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 159 AM EDT Tue May 19 2026 CTZ002>004-MAZ003>007-010>019-026-RIZ001>004-192100- /O.CON.KBOX.HT.Y.0001.260519T1500Z-260521T0000Z/ Hartford CT-Tolland CT-Windham CT-Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-Western Essex MA-Eastern Essex MA-Eastern Hampshire MA-Eastern Hampden MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-Northern Middlesex MA-Northwest Providence RI- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Including the cities of Fitchburg, Warwick, Coventry, Framingham, Windsor Locks, Barre, Amherst, West Greenwich, Worcester, Taunton, Union, Putnam, East Greenwich, Plymouth, Springfield, Quincy, Ayer, Hartford, Boston, Gloucester, Milford, Brockton, Northampton, Orange, Greenfield, Norwood, Willimantic, Foxborough, Cambridge, Providence, Foster, Lawrence, West Warwick, Vernon, Smithfield, and Lowell 159 AM EDT Tue May 19 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT WEDNESDAY... * WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM this morning to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ Visit us at http://www.weather.gov/box BW Action: Continued Issued At: 2026-05-19 13:02:25 570 WWUS71 KBOX 191802 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 202 PM EDT Tue May 19 2026 CTZ002>004-MAZ003>007-010>019-026-RIZ001>004-201000- /O.CON.KBOX.HT.Y.0001.000000T0000Z-260521T0000Z/ Hartford CT-Tolland CT-Windham CT-Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-Western Essex MA-Eastern Essex MA-Eastern Hampshire MA-Eastern Hampden MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-Northern Middlesex MA-Northwest Providence RI- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Including the cities of Smithfield, Vernon, Providence, Willimantic, Taunton, Barre, Orange, Worcester, Lowell, West Warwick, Union, Lawrence, Warwick, Quincy, Brockton, Greenfield, Norwood, Cambridge, West Greenwich, East Greenwich, Hartford, Foster, Coventry, Fitchburg, Putnam, Milford, Springfield, Gloucester, Windsor Locks, Northampton, Foxborough, Plymouth, Ayer, Amherst, Boston, and Framingham 202 PM EDT Tue May 19 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT WEDNESDAY... * WHAT...Heat index values up to 96. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern Rhode Island. * WHEN...Until 8 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ Visit us at http://www.weather.gov/box FT Action: Continued Issued At: 2026-05-20 00:29:49 316 WWUS71 KBOX 200529 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 129 AM EDT Wed May 20 2026 CTZ002>004-MAZ003>007-010>019-026-RIZ001>004-210000- /O.CON.KBOX.HT.Y.0001.000000T0000Z-260521T0000Z/ Hartford CT-Tolland CT-Windham CT-Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-Western Essex MA-Eastern Essex MA-Eastern Hampshire MA-Eastern Hampden MA-Southern Worcester MA- Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-Northern Middlesex MA-Northwest Providence RI- Southeast Providence RI-Western Kent RI-Eastern Kent RI- Including the cities of Brockton, Vernon, Union, Framingham, Smithfield, Taunton, Plymouth, Northampton, Hartford, Barre, Ayer, Foster, Boston, West Greenwich, Lowell, Springfield, Lawrence, Quincy, Fitchburg, Orange, Windsor Locks, West Warwick, Foxborough, Warwick, Cambridge, Greenfield, East Greenwich, Amherst, Willimantic, Worcester, Coventry, Norwood, Providence, Milford, Putnam, and Gloucester 129 AM EDT Wed May 20 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 96. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and moderate humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ Visit us at http://www.weather.gov/box BW Action: Cancelled Issued At: 2026-05-20 08:33:45 443 WWUS71 KBOX 201333 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 933 AM EDT Wed May 20 2026 MAZ003-004-026-201445- /O.CAN.KBOX.HT.Y.0001.000000T0000Z-260521T0000Z/ Eastern Franklin MA-Northern Worcester MA-Northern Middlesex MA- Including the cities of Ayer, Barre, Fitchburg, Orange, and Greenfield 933 AM EDT Wed May 20 2026 ...HEAT ADVISORY IS CANCELLED... $$ CTZ002>004-MAZ005>007-010>019-RIZ001>004-210000- /O.CON.KBOX.HT.Y.0001.000000T0000Z-260521T0000Z/ Hartford CT-Tolland CT-Windham CT-Central Middlesex MA-Western Essex MA-Eastern Essex MA-Eastern Hampshire MA-Eastern Hampden MA- Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA- Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-Northwest Providence RI-Southeast Providence RI-Western Kent RI-Eastern Kent RI- Including the cities of Boston, Union, Brockton, Cambridge, Coventry, West Greenwich, Milford, Quincy, Providence, Springfield, Foxborough, Foster, Warwick, Hartford, Amherst, Willimantic, Gloucester, East Greenwich, Plymouth, Taunton, Smithfield, Vernon, Framingham, Worcester, Windsor Locks, Lawrence, Northampton, Norwood, West Warwick, Putnam, and Lowell 933 AM EDT Wed May 20 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 96. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern Rhode Island. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ Visit us at http://www.weather.gov/box Action: Continued Issued At: 2026-05-20 08:33:45 443 WWUS71 KBOX 201333 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 933 AM EDT Wed May 20 2026 MAZ003-004-026-201445- /O.CAN.KBOX.HT.Y.0001.000000T0000Z-260521T0000Z/ Eastern Franklin MA-Northern Worcester MA-Northern Middlesex MA- Including the cities of Ayer, Barre, Fitchburg, Orange, and Greenfield 933 AM EDT Wed May 20 2026 ...HEAT ADVISORY IS CANCELLED... $$ CTZ002>004-MAZ005>007-010>019-RIZ001>004-210000- /O.CON.KBOX.HT.Y.0001.000000T0000Z-260521T0000Z/ Hartford CT-Tolland CT-Windham CT-Central Middlesex MA-Western Essex MA-Eastern Essex MA-Eastern Hampshire MA-Eastern Hampden MA- Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA- Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-Northwest Providence RI-Southeast Providence RI-Western Kent RI-Eastern Kent RI- Including the cities of Boston, Union, Brockton, Cambridge, Coventry, West Greenwich, Milford, Quincy, Providence, Springfield, Foxborough, Foster, Warwick, Hartford, Amherst, Willimantic, Gloucester, East Greenwich, Plymouth, Taunton, Smithfield, Vernon, Framingham, Worcester, Windsor Locks, Lawrence, Northampton, Norwood, West Warwick, Putnam, and Lowell 933 AM EDT Wed May 20 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 96. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern Rhode Island. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ Visit us at http://www.weather.gov/box Action: Cancelled Issued At: 2026-05-20 18:05:34 596 WWUS71 KBOX 202305 NPWBOX URGENT - WEATHER MESSAGE National Weather Service Boston/Norton MA 705 PM EDT Wed May 20 2026 CTZ002>004-MAZ005>007-010>019-RIZ001>004-210015- /O.CAN.KBOX.HT.Y.0001.000000T0000Z-260521T0000Z/ Hartford CT-Tolland CT-Windham CT-Central Middlesex MA-Western Essex MA-Eastern Essex MA-Eastern Hampshire MA-Eastern Hampden MA- Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA- Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-Northwest Providence RI-Southeast Providence RI-Western Kent RI-Eastern Kent RI- Including the cities of Boston, Union, Brockton, Cambridge, Coventry, West Greenwich, Milford, Quincy, Providence, Springfield, Foxborough, Foster, Warwick, Hartford, Amherst, Willimantic, Gloucester, East Greenwich, Plymouth, Taunton, Smithfield, Vernon, Framingham, Worcester, Windsor Locks, Lawrence, Northampton, Norwood, West Warwick, Putnam, and Lowell 705 PM EDT Wed May 20 2026 ...HEAT ADVISORY IS CANCELLED... $$ Visit us at http://www.weather.gov/box | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||