A cold pool aloft help trigger diurnal afternoon showers and thunderstorms. One storm, in northeast MA struck a house.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOX wrote it up.
A cold pool aloft help trigger diurnal afternoon showers and thunderstorms. One storm, in northeast MA struck a house.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before the first event at Jun 9, 3:06 PM EST, 1 hour 5 minutes earlier.
Area Forecast Discussion National Weather Service Boston/Norton MA 406 PM EDT Fri Jun 9 2023 .SYNOPSIS... Showers and scattered thunderstorms wind down this evening. Milder temperatures begin to return Saturday with the main threat for diurnally driven showers confined to eastern New England. A warming trend Sunday with a low risk for a few afternoon showers in the interior, then the weather pattern turns unsettled again for much of the upcoming week with the risk of showers each day. Temperatures will be seasonable for much of next week. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... 4 PM Update... * Numerous showers & scattered t-storms with small hail come to an end by the mid-late evening hours * Patchy ground fog possible overnight with lows generally in the upper 40s to the lower 50s Shortwave/cold pool aloft was continuing to result in numerous showers and scattered thunderstorms late this afternoon. SPC Meso-analysis indicating approximately 250-500 J/KG of Cape along with mid-level lapse rates in excess of 6.5 C/KM. This combined with cool temps at the surface will continue to allow the stronger storms to produce small hail into the early evening with localized heavy rainfall. Limited instability & shear will result in this activity generally remaining sub-severe...but can not rule out a rogue severe thunderstorm from terrain/mesoscale influences. The showers and scattered thunderstorms will wind down by mid to late evening with the loss of diurnal heating. Otherwise, generally dry weather prevails for the remainder of the night other than perhaps a brief spot shower. Low temps should bottom out mainly in the upper 40s to the lower 50s...but will need to watch for some patchy ground fog in the typically prone locations forming especially in areas that receive a modest amount of rain. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... Highlights... * Turning milder Saturday away from the coast with highs 70-75 * Scattered diurnally driven showers Sat and perhaps an isolated t-storm mainly confined to mainly the eastern half of MA/RI Details... Saturday... The upper trough axis will finally begin to shift east of the region on Saturday. This will allow milder mid level temps to spread eastward and also result in partial sunshine especially across parts of interior southern New England. Weak pressure gradient will promote sea breezes along much of the immediate coast...holding high temps in the 60s in those locales. However...the rest of the region should see some partial sunshine with highs recovering into the 70 to 75 degree range. In fact...the lower CT River Valley will likely see highs more in the middle 70s. The cold pool aloft will be shifting east as well. This will keep much of western MA/CT dry on Saturday except perhaps for a spot shower. However...steep mid level lapse rates will persist across the eastern half of the region especially over eastern MA. Therefore...we do expect scattered diurnally driven showers to develop across central/eastern MA & RI on Saturday. Areal coverage will not be as widespread as today...so some of these locations should stay dry. We might have enough marginal instability for an isolated t-storm or two across eastern New England...but that is about it and not expecting a repeat of today. Saturday night... Upper trough continues to move east and away from the region as a mid level ridge axis approaches. This will result in dry/tranquil weather Saturday night. Low temps will bottom out mainly in the upper 40s to the middle 50s. Light/Calm winds may promote patchy ground fog late in the typically prone locations...but not expecting anything widespread. && .LONG TERM /SUNDAY THROUGH FRIDAY/... Highlights... * Mainly dry and warmer Sunday. Low risk for afternoon shower interior * Unsettled weather pattern returns for much of next week with chance of showers each day. Seasonable temps Sunday... Weak ridging aloft develops across New Eng ahead of upper low dropping south into the Gt Lakes. This will bring partly to mostly sunny skies although some increase in clouds is expected during the afternoon. Marginal instability develops with a few hundred J/kg of CAPE which could lead to a shower in the interior in the afternoon, but given lack of forcing much of the region will be dry. It will be a warmer day as 850 mb temps rise to 12-13C. This will support highs in the upper 70s and lower 80s, but afternoon sea-breezes will keep coastal locations a bit cooler. Monday through Friday... Unsettled pattern returns as anomalous upper low across the Gt Lakes gradually moves east across New Eng through midweek before lifting out. But additional shortwave energy will be rotating southward from Canada with trough reloading late in the week. This will result in an extended period of unsettled weather with the risk of showers each day. The challenge will be the timing of wet weather. A period of widespread showers and a few t-storms is expected sometime Monday into Tuesday as anomalous PWAT plume advects northward ahead of frontal system approaching from the west. However, there is considerable uncertainty with the exact timing. GFS focuses the rain mostly on Monday then drying out Mon night/Tue while ECWMF brings the rain in Mon night into Tue. We leaned toward NBM PoPs which brings highest PoPs late Mon into early Tue. Some drying is expected behind this system Tue night, then additional shower activity and possible thunder Wed as upper low and cold pool moves into the region. Remains somewhat unsettled Thu/Fri as multiple shortwaves will be rotating through the mean trough, although a drier pattern with less coverage of showers and not a washout. Despite the unsettled pattern, temps should average near normal for much of the upcoming week, and possibly above normal for a few of the days as GEFS/EPS ensembles show high probs of 850T above 10C and low probs of max temps of 80+. Coolest day expected to be Wed as upper low/trough axis moves overhead. && .AVIATION /20Z FRIDAY THROUGH WEDNESDAY/... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. 18z TAF Update... Into Early This Evening...High Confidence. VFR dominates but briefly lower conditions expected in numerous showers and scattered t-storms into early this evening. Remnant smoke from Canadian Wildfires may result in MVFR Visibility at times near the Cape and Islands. Tonight...Moderate Confidence. Numerous showers and scattered t-storms diminish this evening with the loss of daytime heating. Otherwise...VFR outside of localized patchy ground fog that may develop in some spots overnight. Remnant smoke from the Canadian Wildfires may continue to flirt with the Cape and Islands a times...resulting in perhaps some marginal MVFR vsbys. There also may be a period of low clouds/fog that develop near the coast after midnight but that remains uncertain. Light/Calm Wind. Saturday...High Confidence. Mainly VFR after any low clouds/fog patches burn off by mid-late morning. Brief localized lower conditions are also possible in the afternoon...mainly across eastern MA in scattered showers and perhaps an isolated t-storm or two. Light NW winds except for sea breezes developing along portions of the immediate coast. Saturday night...High Confidence. Mainly VFR outside any localized patchy ground fog that may develop in the typically prone locations toward daybreak. Light SW Winds KBOS Terminal...Moderate Confidence in TAF. Main concern will be for a few thunderstorms in the vicinity of the terminal through about 00z. KBDL Terminal...Moderate Confidence in TAF. Main concern will be for a few thunderstorms in the vicinity of the terminal through 00z. Outlook /Sunday through Wednesday/... Sunday: VFR. Sunday Night: VFR. Slight chance SHRA. Monday: Mainly VFR, with local MVFR possible. Breezy. Chance SHRA. Monday Night: Mainly MVFR, with areas IFR possible. Breezy. SHRA likely, isolated TSRA. Tuesday: Mainly MVFR, with local IFR possible. Breezy. Chance SHRA, isolated TSRA. Tuesday Night: VFR. Chance SHRA. Wednesday: Mainly VFR, with local MVFR possible. Breezy. Chance SHRA. && .MARINE... Forecaster Confidence Levels: Low - less than 30 percent. Medium - 30 to 60 percent. High - greater than 60 percent. Tonight through Saturday night...High Confidence. Weak pressure gradient will keep winds/seas below small craft advisory thresholds through Saturday night. Main concern is for a few nearshore thunderstorms early this evening...but the bulk of those storms will dissipate as they approach the waters. The only other issue will be some reduced vsbys mainly near and south of the Cape/Islands tonight from the remnant smoke from the Canadian Wildfires and perhaps some fog late. Outlook /Sunday through Wednesday/... Sunday: Winds less than 25 kt. Sunday Night: Winds less than 25 kt. Slight chance of rain showers. Monday: Winds less than 25 kt. Seas locally approaching 5 ft. Chance of rain showers. Monday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Rain showers likely, isolated thunderstorms. Tuesday: Winds less than 25 kt. Seas up to 5 ft. Chance of rain showers. Tuesday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Chance of rain showers. Wednesday: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...Air Quality Alert until midnight EDT tonight for MAZ020>024. RI...None. MARINE...None. && SYNOPSIS...Frank/KJC NEAR TERM...Frank SHORT TERM...Frank LONG TERM...KJC AVIATION...Frank/KJC MARINE...Frank/KJC
Hazardous Weather Outlook National Weather Service Boston/Norton MA 408 PM EDT Fri Jun 9 2023 CTZ002>004-MAZ002>019-026-RIZ001>008-102015- Hartford CT-Tolland CT-Windham CT-Western Franklin MA- Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Western Hampshire MA- Western Hampden 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-Bristol RI-Washington RI-Newport RI-Block Island RI- 408 PM EDT Fri Jun 9 2023 This Hazardous Weather Outlook is for northern Connecticut, central Massachusetts, eastern Massachusetts, northeastern Massachusetts, southeastern Massachusetts, western Massachusetts, and Rhode Island. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ020>024-102015- Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA- Nantucket MA- 408 PM EDT Fri Jun 9 2023 ...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... This Hazardous Weather Outlook is for southeastern Massachusetts. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Air Quality Alert. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ230>237-250-251-254>256-102015- Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound- Buzzards Bay-Rhode Island Sound-Narragansett Bay-Block Island Sound- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary-Massachusetts Bay and Ipswich Bay- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 408 PM EDT Fri Jun 9 2023 This Hazardous Weather Outlook is for Massachusetts and Rhode Island coastal waters. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. For more information on upcoming hazardous weather, please see the Area Forecast Discussion on our webpage for the latest forecast thinking. There is also our Enhanced Hazardous Weather Outlook at www.weather.gov/box/ehwo For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
Special Weather Statement National Weather Service Boston/Norton MA 230 PM EDT Fri Jun 9 2023 MAZ004-005-012>015-091930- Southern Worcester MA-Suffolk MA-Western Norfolk MA- Central Middlesex County MA-Northern Worcester MA- Southeast Middlesex MA- 230 PM EDT Fri Jun 9 2023 ...Strong thunderstorms will impact portions of southeastern Worcester, northwestern Norfolk, west central Suffolk and central Middlesex Counties through 330 PM EDT... At 229 PM EDT, Doppler radar was tracking strong thunderstorms along a line extending from Concord to near Shrewsbury. Movement was south at 10 mph. HAZARD...Pea size hail. SOURCE...Trained Spotter Reported. IMPACT...Little to no impact from hail is expected. Locations impacted include... Boston, Worcester, Cambridge, Newton, Framingham, Waltham, Brookline, Medford, Arlington, Billerica, Marlborough, Woburn, Shrewsbury, Natick, Watertown, Lexington, Needham, Wellesley, Belmont and Burlington. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors when you hear thunder. Do not resume outdoor activities until at least 30 minutes after the storm has passed. Do not drive through flooded roads or underpasses. Avoid low lying areas near small streams. && LAT...LON 4234 7112 4208 7188 4231 7180 4257 7118 TIME...MOT...LOC 1829Z 001DEG 10KT 4245 7135 4231 7173 MAX HAIL SIZE...0.25 IN MAX WIND GUST...<30 MPH KP
Special Weather Statement
National Weather Service Boston/Norton MA
252 PM EDT Fri Jun 9 2023
MAZ013-015-016-091930-
Suffolk MA-Western Norfolk MA-Eastern Norfolk MA-
252 PM EDT Fri Jun 9 2023
...A strong thunderstorm will impact portions of northeastern Norfolk
and southwestern Suffolk Counties through 330 PM EDT...
At 252 PM EDT, Doppler radar was tracking a strong thunderstorm over
Westwood, or over Norwood, moving east at 15 mph.
HAZARD...Pea size hail.
SOURCE...Radar indicated.
IMPACT...Little to no impact from hail is expected.
Locations impacted include...
Boston, Quincy, Newton, Brookline, Weymouth, Braintree, Randolph,
Needham, Norwood, Milton, Dedham, Walpole, Canton, Westwood,
Medfield, Holbrook and Dover.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.
&&
LAT...LON 4232 7100 4233 7104 4231 7103 4230 7105
4229 7102 4232 7101 4230 7099 4229 7101
4227 7099 4227 7097 4226 7097 4225 7099
4225 7096 4216 7094 4216 7128 4226 7130
4234 7101
TIME...MOT...LOC 1852Z 258DEG 14KT 4222 7121
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH
KPSpecial Weather Statement National Weather Service Boston/Norton MA 321 PM EDT Fri Jun 9 2023 MAZ005-012-013-RIZ001-092000- Southern Worcester MA-Western Norfolk MA-Central Middlesex County MA- Northwest Providence RI- 321 PM EDT Fri Jun 9 2023 ...A strong thunderstorm will impact portions of southeastern Worcester, southwestern Norfolk, south central Middlesex and north central Providence Counties through 400 PM EDT... At 321 PM EDT, the public reported a strong thunderstorm over Northbridge, or near Milford, moving east at 10 mph. HAZARD...Pea size hail. SOURCE...Public. IMPACT...Little to no impact from hail is expected. Locations impacted include... Woonsocket, Cumberland, Franklin, Milford, Grafton, Bellingham, Northbridge, Hopkinton, Holliston, Uxbridge, Medway, Medfield, Norfolk, Wrentham, Blackstone, Sutton, Douglas, Millis, Upton and Hopedale. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors when you hear thunder. Do not resume outdoor activities until at least 30 minutes after the storm has passed. Do not drive through flooded roads or underpasses. Avoid low lying areas near small streams. && LAT...LON 4209 7175 4221 7166 4220 7132 4199 7144 TIME...MOT...LOC 1921Z 282DEG 10KT 4213 7164 MAX HAIL SIZE...0.25 IN MAX WIND GUST...<30 MPH KP
Special Weather Statement National Weather Service Boston/Norton MA 409 PM EDT Fri Jun 9 2023 MAZ012-013-017-RIZ001-002-092100- Southern Worcester MA-Western Norfolk MA-Northern Bristol MA- Northwest Providence RI-Southeast Providence RI- 409 PM EDT Fri Jun 9 2023 ...A strong thunderstorm will impact portions of southeastern Worcester, southwestern Norfolk, northwestern Bristol and northeastern Providence Counties through 500 PM EDT... At 408 PM EDT, Doppler radar was tracking a strong thunderstorm over Woonsocket, moving southeast at 15 mph. HAZARD...Pea size hail. SOURCE...Radar indicated. IMPACT...Little to no impact from hail is expected. Locations impacted include... Providence, Pawtucket, Woonsocket, Cumberland, North Providence, Franklin, Johnston, North Attleborough, Attleboro, Smithfield, Lincoln, Central Falls, Bellingham, Burrillville, Seekonk, North Smithfield, Wrentham, Blackstone, Plainville and Millville. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors when you hear thunder. Do not resume outdoor activities until at least 30 minutes after the storm has passed. Do not drive through flooded roads or underpasses. Avoid low lying areas near small streams. && LAT...LON 4199 7164 4209 7144 4192 7127 4182 7152 TIME...MOT...LOC 2008Z 329DEG 12KT 4200 7151 MAX HAIL SIZE...0.25 IN MAX WIND GUST...<30 MPH KP
Special Weather Statement
National Weather Service Boston/Norton MA
432 PM EDT Fri Jun 9 2023
MAZ005>007-014-026-092130-
Northwest Middlesex County MA-Eastern Essex MA-
Central Middlesex County MA-Western Essex MA-Southeast Middlesex MA-
432 PM EDT Fri Jun 9 2023
...Strong thunderstorms will impact portions of southern Essex and
northeastern Middlesex Counties through 530 PM EDT...
At 431 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Haverhill to Dracut to near Chelmsford.
Movement was east at 25 mph.
HAZARD...Pea size hail. Minor flooding
SOURCE...Radar indicated.
IMPACT...Little to no impact from hail is expected.
Locations impacted include...
Lowell, Lawrence, Haverhill, Peabody, Methuen, Billerica, Beverly,
Woburn, Chelmsford, Andover, Dracut, Tewksbury, North Andover,
Danvers, Wakefield, Reading, Burlington, Wilmington, Westford and
Stoneham.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.
&&
LAT...LON 4273 7082 4271 7082 4270 7083 4270 7079
4272 7080 4272 7078 4269 7079 4267 7073
4262 7086 4248 7107 4260 7154 4270 7140
4270 7129 4274 7124 4274 7119 4277 7118
4278 7116
TIME...MOT...LOC 2031Z 282DEG 20KT 4276 7112 4270 7129 4264 7138
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH
KPSpecial Weather Statement
National Weather Service Boston/Norton MA
436 PM EDT Fri Jun 9 2023
MAZ018-019-021-092115-
Eastern Plymouth MA-Southern Plymouth MA-Western Plymouth MA-
436 PM EDT Fri Jun 9 2023
...A strong thunderstorm will impact portions of central Plymouth
County through 515 PM EDT...
At 436 PM EDT, Doppler radar was tracking a strong thunderstorm near
Middleborough, or near Bridgewater, moving east at 15 mph.
HAZARD...Pea size hail.
SOURCE...Radar indicated.
IMPACT...Little to no impact from hail is expected.
Locations impacted include...
Plymouth, Bridgewater, Middleborough, Wareham, East Bridgewater,
Kingston, Carver, Hanson, Halifax and Plympton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.
&&
LAT...LON 4177 7070 4193 7098 4204 7094 4197 7067
4195 7065 4195 7063 4194 7062
TIME...MOT...LOC 2036Z 292DEG 14KT 4193 7090
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...<30 MPH
KPThe Boston radar (KBOX), 83 km away, was scanning. The volume nearest the first event began at 21:08 UTC.
1 lightning. Local standard time, as filed.
In Lawrence at 511 PM EDT (411 PM EST), a house was struck by lightning, causing damage to the electrical system.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Massachusetts in 2023Every state in 2023This day in weather historyWarnings in Massachusetts, June 2023
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1097886.