A trough moved from the eastern Great Lakes into the mid Atlantic then New England on Tuesday. Southern New England was in the warm sector of a weak low which provided enough instability for scattered thunderstorms Tuesday morning into early afternoon before the cold front moved through.
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 trough moved from the eastern Great Lakes into the mid Atlantic then New England on Tuesday. Southern New England was in the warm sector of a weak low which provided enough instability for scattered thunderstorms Tuesday morning into early afternoon before the cold front moved through. There was an EF-1 tornado in Mattapoisett and an EF-0 tornado in Barnstable.
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 Aug 8, 6:54 AM EST, 1 hour 36 minutes earlier.
Area Forecast Discussion
National Weather Service Boston/Norton MA
754 AM EDT Tue Aug 8 2023
.SYNOPSIS...
Excessive rainfall and flood threat this morning and early
afternoon as showers and thunderstorms move over southern New
England. Another round of thunderstorms is possible by late
afternoon in interior Massachusetts and Connecticut. Drying out
on Wednesday, although unsettled conditions back to the region
Thursday- Sunday. Shower and thunderstorm chances will be
greatest Thursday afternoon and trend more scattered for the
weekend.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
750 AM Update: Only a few minor changes to POPs based off radar
trends and newer high-res guidance. Storms have developed some
weak rotation, generally north of the Route 9 corridor in Mass.
Our area of current focus is northeast MA for quick moving
storms that may contain weak rotation. Interestingly these
storms have had zero lightning, yet have rotation. Something to
keep in mind this morning, that a strong shower can produce weak
rotation. Forecast does remain on track, see previous forecast
below.
400 AM Update
Today
Highlights
* Heavy rainfall and thunderstorms expected this morning into early
afternoon
* Flood Watch in effect for eastern MA and RI through this evening
* Thunderstorms will be accompanied by a low risk for damaging wind
gusts or an isolated tornado/water spout.
* Additional storms possible late this afternoon/evening
Heavy Rainfall Threat
A flood watch has been put into effect for most of RI and eastern MA
as thunderstorms with torrential rainfall are forecast to develop
over southern New England this morning. Environmental parameters are
optimal for excessive rainfall as robust short-wave energy by August
standards traverses over the region this morning and afternoon.
PWATs in excess of 2 inches are sitting over the region at this time
with a deep warm cloud layer greater than 12000 feet supporting
efficient rainfall processes. Additionally, model forecasts for
height falls indicate that the strongest forcing for synoptic
ascent will come very close to coinciding with peak
heating/diurnal instability. CAPE values greater than 1000 J/kg
are forecast to develop over east and northeastern MA where both
the highest PWATs and synoptic forcing are forecast to reside.
As if the combination of these parameters was not enough, we're
also looking at an environment favorable for
backbuilding/training thunderstorms per NAM3K bufkit soundings.
So how much precip can we expect? 00Z HREF probability matched
mean 24 hour precip ranges from 2 to 3 inches across much of
eastern MA. Local probability matched means suggest the
potential for locally higher amounts nearly double those values.
Severe Weather Threat
While flooding is the main hazard of concern for today, we can't
forget that this system will be accompanied by fairly robust low-
level shear and helicity. 20 to 25 knots of 1km shear and 0-1km SRH
from 100 to 150 m2/s2 will be present as these storms move over the
region. This introduces a low risk for a tornado in southern New
England today (2 percent per SPC CWO). The limiting factor today for
severe thunderstorm potential (including tornadoes) will be the deep-
layer shear profile (unfavorable hodograph) and mid-level lapse
rates. Nonetheless, STP values from the HREF are in the 0.5 to 1
range across eastern MA, so we'll be watching KBOX radar closely for
any signs of rotation.
Timeline
KBOX radar is currently detecting mostly light showers west of I-495
at 330 am. Expect some showers to intensify into thunderstorms after
sunrise as day time heating ensues. Heaviest rainfall is generally
expected to be between 5 am and noon. Areas west of I-495 are
expected to experience the heavy rainfall between roughly 5am and
9am while areas east of I-495 including Boston would be in the 8am
to noon window. Areas across southeastern MA may see some clearing
by early afternoon while areas further norther may experience
another round of cold frontal showers and thunderstorms later this
afternoon and evening. There is a fair bit of uncertainty with
respect to this second batch of precip as the potential will rely
heavily on how the expected heavy rainfall this morning unfolds.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/...
Tonight and Tomorrow
Any remaining showers/storms from this evening should diminish after
sunset when the cold frontal boundary is expected to be pushing
east of the region. This will be followed by gradual clearing
and lower dewpoints settling over the region for Wednesday.
While Wednesday looks to be sunny and dry with highs in the 80s,
deep mixing and steep low-level lapse rates will support gusty
northwest winds in the wake of the exiting cold front. 30 mph
gusts will be possible during the early afternoon hours when
diurnal mixing will be at its peak.
&&
.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
Highlights
* Wednesday will be the pick of the week with the highest confidence
the area will see dry conditions
* Unsettled end to the workweek and into the weekend
Wednesday will bring a brief reprieve from the continuous unsettled
pattern we have been entrenched in for the last several weeks as
weak ridging and surface high pressure settles over the region. With
that said, we are not immune to some scattered morning showers, as
outlined by the CAMs as the leeward side of the trough axis/low
pressure pushes east into the Gulf of Maine. A much drier column of
air moves in behind the departing shortwave, leading to clearing
skies. The biggest headline for Wednesday will be gusty winds, with
a 925mb LLJ of 25 to 35 kt persists over the region. Winds should
peak during the morning hours when the jet is strongest, subsiding
slightly through the day as westerly flow develops.
Unsettled weather returns Thursday through the end of the period.
While flow will be primarily zonal, several low pressure systems or
shortwave features will swing near to or through southern New
England over the coming days. The most robust, and therefore highest
confidence precipitation event on the horizon comes Thursday
afternoon and evening as a rather strong Summer low, of 998mb, moves
across southern Canada. The shortwave energy defined by the low's
passage appears to be greatest as a cold front swings through;
though, this front will bring little relief from muggy dewpoints in
the 60s. While this frontal passage/shortwave displays healthy
severe weather characteristics, including PWATs surging towards 2"
and Bulk shear values approaching 60kt, both instability (~200-400
J/KG) and mid level lapse rates (~5.5C/km) are dismal, leading to
the conclusion that a widespread thunderstorm activity is unlikely;
though heavy downpours are possible. The one exception to
thunderstorm coverage and intensity may be across SE MA and the
south Coast, where a strong LLJ develops between 18 Thursday-00Z
Friday, MLLR approach 7C/km, and instability manages to muster up
about ~1000-1400 J/kg MUCAPE. Timing will again be critical as
instability will fall off quickly after sunset.
Friday appears to be a mainly dry day for southern New England as we
fall into a lull between shortwave features and very weak mid level
ridging develops.
Continued parade of weak shortwaves continues into the weekend,
though shower activity appears to be more scattered in nature
Saturday and Sunday. Dewpoints finally drop by Saturday morning,
leading to some early fall like temperatures, 50s across the
interior, to start the day. Summer lovers will be glad to hear that
even with the cool start to the day, temperature rebound into the
80s all weekend.
&&
.AVIATION /12Z TUESDAY THROUGH SATURDAY/...
Forecast Confidence Levels:
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
12Z Update...No major changes to the forecast, opt to con't a
TEMPO for TSRA at BOS and PVD 14/15 to 18/19 Zulu. Thunder
remains to our south over eastern Long Island, do believe with
day time heating areas of thunder will advect northward into RI
and eastern MA air space. Otherwise forecast remains on track.
See previous discussion below.
Today...Moderate Confidence
MVFR/IFR ceilings for this morning through early afternoon as
showers and thunderstorms overspread southern New England. Some
improvements to VFR will be possible after 15Z for the western
terminals and after 18Z for the eastern terminals. Another round
of showers and thunderstorms will be possible this afternoon and
evening, but confidence is low. If showers/storms redevelop
later today they should be more isolated to scattered as opposed
to the more widespread activity we're expecting for the first
half of the day.
Tonight...High confidence
Any evening showers/storms should taper off after 00Z. VFR
thereafter with 10 to 20 knot west/northwest winds.
Tomorrow... High confidence
VFR. 15 knot northwest winds with gusts from 25 to 30 knots
possible.
KBOS TAF...Moderate Confidence
Highest confidence for TSRA at BOS is between 12 and 16Z, but it
is possible an isolated shower or storm could develop and move
over the terminal between 09 and 12Z. Low confidence in this
outcome hence the VCSH for this time frame. Should see
improvements after 18Z with VFR conditions likely returning.
There is a low chance for another round of isolated to scattered
showers and thunderstorms by mid-afternoon/evening but
confidence was too low to mention in 06Z TAF.
KBDL TAF...Moderate confidence in TAF.
Highest confidence for TSRA at BDL is between 09 and 12Z. There
is shower activity near BDL at this hour and there is a low
chance that thunderstorm activity could develop prior to 09Z.
Should see substantial improvements by early afternoon. Another
round of isolated showers and storms may be possible by mid-
afternoon/evening, but confidence is low at this time as the
outcome will rely heavily on how things unfold this morning.
Outlook /Wednesday Night through Saturday/...
Wednesday Night: VFR. Breezy.
Thursday through Thursday Night: Mainly VFR, with local MVFR
possible. Breezy. Chance SHRA, isolated TSRA.
Friday: VFR. Breezy.
Friday Night through Saturday: VFR.
&&
.MARINE...
Forecaster Confidence Levels:
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.
Today
Gusty southeast winds ahead of a warm front become southwest as
the warm front lifts north and east. Gusts up to 30 knots
possible over the outer waters. SCY remains in effect. Showers
and thunderstorms expected over the coastal waters this morning
with waterspouts possible!
A rip current statement is in effect for Tue. While it will be
far from an ideal beach day, this statement was issued to
address the potential for rip currents on southern and
southeast-facing beaches.
Tonight and Tomorrow
Unsettled weathers diminishes overnight as a cold front exits
east of the coastal waters. Gusty west/northwest winds develop
behind the front. 15 to 20 knot sustained winds tonight and
tomorrow with gusts up to 30 knots possible. Seas from 5 to 7
feet over the outer waters.
Outlook /Wednesday Night through Saturday/...
Wednesday Night: Winds less than 25 kt. Seas locally
approaching 5 ft.
Thursday: Winds less than 25 kt. Chance of rain showers.
Thursday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of seas approaching 5 ft. Chance of
rain showers, isolated thunderstorms.
Friday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Friday Night: Winds less than 25 kt. Seas locally approaching
5 ft.
Saturday: Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...Flood Watch through this evening for MAZ004>007-012>021-026.
High Risk for Rip Currents until 6 PM EDT this evening for MAZ007-
020>024.
RI...Flood Watch through this evening for RIZ001>005-007.
High Risk for Rip Currents until 6 PM EDT this evening for
RIZ006>008.
MARINE...Small Craft Advisory until 8 PM EDT this evening for
ANZ231>235-237.
Small Craft Advisory until 8 AM EDT Wednesday for ANZ250-
254>256.
Small Craft Advisory until 2 PM EDT this afternoon for ANZ251.
&&
SYNOPSIS...Dooley/RM
NEAR TERM...Dooley/RM
SHORT TERM...RM
LONG TERM...Dooley/KS
AVIATION...Dooley/RM
MARINE...Dooley/RMHazardous Weather Outlook National Weather Service Boston/Norton MA 410 AM EDT Tue Aug 8 2023 MAZ004>006-012>019-026-RIZ001>005-090815- Northern Worcester MA-Central Middlesex MA-Western Essex 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- 410 AM EDT Tue Aug 8 2023 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... This Hazardous Weather Outlook is for central Massachusetts, eastern Massachusetts, northeastern Massachusetts, southeastern Massachusetts and northern Rhode Island. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CTZ002>004-MAZ002-003-008>011-090815- Hartford CT-Tolland CT-Windham CT-Western Franklin MA- Eastern Franklin MA-Western Hampshire MA-Western Hampden MA- Eastern Hampshire MA-Eastern Hampden MA- 410 AM EDT Tue Aug 8 2023 This Hazardous Weather Outlook is for northern Connecticut and western Massachusetts. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ007-020-021-RIZ007-090815- Eastern Essex MA-Southern Bristol MA-Southern Plymouth MA-Newport RI- 410 AM EDT Tue Aug 8 2023 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... ...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS AFTERNOON... This Hazardous Weather Outlook is for northeastern Massachusetts, southeastern Massachusetts and southern Rhode Island. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. High Rip Current Risk. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ022>024-RIZ006-008-090815- Barnstable MA-Dukes MA-Nantucket MA-Washington RI-Block Island RI- 410 AM EDT Tue Aug 8 2023 ...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS AFTERNOON... This Hazardous Weather Outlook is for southeastern Massachusetts and southern Rhode Island. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Rip Current Risk. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ230>237-250-251-254>256-090815- 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- 410 AM EDT Tue Aug 8 2023 This Hazardous Weather Outlook is for Massachusetts and Rhode Island coastal waters. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. 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
637 AM EDT Tue Aug 8 2023
MAZ005>007-081100-
Eastern Essex MA-Central Middlesex County MA-Western Essex MA-
637 AM EDT Tue Aug 8 2023
...A strong thunderstorm will impact portions of northwestern Essex
and northeastern Middlesex Counties through 700 AM EDT...
At 637 AM EDT, Doppler radar was tracking a strong thunderstorm over
Andover, moving northeast at 30 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Strong winds could cause minor damage such as downed
branches.
Locations impacted include...
Lawrence, Haverhill, Methuen, Andover, Dracut, Tewksbury, North
Andover, Wilmington, Newburyport, Amesbury, North Reading, Salisbury,
Georgetown, Boxford, Newbury, Groveland, Merrimac, and West Newbury.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
&&
LAT...LON 4286 7085 4287 7082 4285 7082 4258 7111
4258 7122 4262 7127 4274 7122 4274 7118
4280 7118 4282 7114 4281 7107 4286 7103
4287 7097 4289 7093 4289 7090
TIME...MOT...LOC 1037Z 208DEG 28KT 4265 7117
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
BLSpecial Weather Statement
National Weather Service Boston/Norton MA
658 AM EDT Tue Aug 8 2023
MAZ005-006-012-014-081145-
Southern Worcester MA-Central Middlesex County MA-Western Essex MA-
Southeast Middlesex MA-
658 AM EDT Tue Aug 8 2023
...Shower with gusty winds impact portions of Metrowest through 745
AM EDT...
At 656 AM EDT, Doppler radar was tracking several showers with the
potential for localized strong winds and perhaps a brief funnel
cloud. One shower was located near Framingham, and the other was
northeast of Sudbury. Movement was to the north at 25 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Strong winds could cause minor damage such as downed
branches.
Locations impacted include...
Lowell, Framingham, Waltham, Billerica, Marlborough, Chelmsford,
Andover, Natick, Lexington, Tewksbury, Wellesley, Burlington,
Wilmington, Westford, Acton, Hudson, Concord, Sudbury, Ashland, and
Bedford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
&&
LAT...LON 4262 7112 4231 7132 4231 7133 4222 7138
4228 7155 4266 7136
TIME...MOT...LOC 1056Z 200DEG 23KT 4238 7136
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
NashSpecial Weather Statement
National Weather Service Boston/Norton MA
737 AM EDT Tue Aug 8 2023
MAZ005>007-081215-
Eastern Essex MA-Central Middlesex County MA-Western Essex MA-
737 AM EDT Tue Aug 8 2023
...Shower with gusty winds and possible funnel cloud moving across
parts of Northeast Massachusetts through 815 AM EDT...
At 734 AM EDT, Doppler radar was tracking a heavy shower with
gusty winds over Billerica, moving northeast at 30 mph.
HAZARD...Winds to 40 mph and possible funnel cloud.
SOURCE...Radar indicated.
IMPACT...Strong winds could cause minor damage such as downed
branches.
Locations impacted include...
Lawrence, Haverhill, Methuen, Billerica, Andover, Lexington, Dracut,
Tewksbury, North Andover, Burlington, Wilmington, North Reading,
Bedford, Georgetown, Boxford, Newbury, Groveland, Rowley, and
Carlisle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
&&
LAT...LON 4274 7091 4248 7124 4249 7125 4253 7134
4274 7120 4274 7118 4277 7118 4282 7115
TIME...MOT...LOC 1134Z 214DEG 25KT 4252 7128
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
NashSpecial Weather Statement
National Weather Service Boston/Norton MA
809 AM EDT Tue Aug 8 2023
MAZ005>007-014-081315-
Eastern Essex MA-Central Middlesex County MA-Western Essex MA-
Southeast Middlesex MA-
809 AM EDT Tue Aug 8 2023
...A shower with gusty winds and possible funnel cloud moving across
portions of northwestern Essex and northeastern Middlesex Counties
through 915 AM EDT...
At 809 AM EDT, Doppler radar was tracking a strong thunderstorm over
Sudbury, or near Framingham, moving northeast at 25 mph.
HAZARD...Winds in excess of 40 mph and possible funnel cloud.
SOURCE...Radar indicated.
IMPACT...Strong winds could cause minor damage such as downed
branches.
Locations impacted include...
Lowell, Lawrence, Haverhill, Waltham, Methuen, Billerica, Woburn,
Chelmsford, Andover, Lexington, Dracut, Tewksbury, North Andover,
Reading, Burlington, Wilmington, Westford, Acton, Concord, and
Sudbury.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
&&
LAT...LON 4281 7107 4272 7089 4233 7135 4239 7148
4270 7131 4270 7129 4274 7124 4274 7118
4279 7118 4281 7116 4282 7113
TIME...MOT...LOC 1208Z 213DEG 23KT 4240 7140
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
BLSpecial Weather Statement
National Weather Service Boston/Norton MA
905 AM EDT Tue Aug 8 2023
MAZ020-RIZ003>007-081400-
Southern Bristol MA-Bristol RI-Washington RI-Eastern Kent RI-
Western Kent RI-Newport RI-
905 AM EDT Tue Aug 8 2023
...A strong thunderstorm will impact portions of south central
Bristol, Washington, Newport, southeastern Kent and Bristol Counties
through 1000 AM EDT...
At 905 AM EDT, Doppler radar was tracking a strong thunderstorm over
Charlestown, or 7 miles west of South Kingstown, moving northeast at
30 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Strong winds could cause minor damage such as downed
branches.
Locations impacted include...
Fall River, Warwick, Dartmouth, South Kingstown, North Kingstown,
Newport, Bristol, Westerly, Somerset, Portsmouth, Barrington,
Middletown, Narragansett, Swansea, Tiverton, Westport, East
Greenwich, Warren, Hopkinton, and Charlestown.
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 4151 7179 4176 7129 4171 7121 4174 7119
4171 7117 4175 7113 4168 7119 4150 7112
4151 7109 4153 7110 4153 7106 4158 7107
4153 7105 4155 7101 4152 7104 4153 7096
4133 7181
TIME...MOT...LOC 1305Z 235DEG 28KT 4141 7169
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
BLSpecial Weather Statement
National Weather Service Boston/Norton MA
929 AM EDT Tue Aug 8 2023
MAZ005>007-014-015-081430-
Eastern Essex MA-Suffolk MA-Central Middlesex County MA-
Western Essex MA-Southeast Middlesex MA-
929 AM EDT Tue Aug 8 2023
...A developing thunderstorm will impact portions of Essex,
northeastern Suffolk and east central Middlesex Counties through
1030 AM EDT...
At 928 AM EDT, Doppler radar was tracking a developing thunderstorm
over Middleton, or near North Andover, moving north at 35 mph.
HAZARD...Winds in excess of 40 mph. Broad rotation was noted with
this storm and may produce funnel clouds.
SOURCE...Radar indicated.
IMPACT...Strong winds could cause minor damage such as downed
branches.
Locations impacted include...
Lynn, Lawrence, Haverhill, Malden, Medford, Revere, Peabody, Methuen,
Salem, Beverly, Woburn, Andover, Lexington, Tewksbury, North Andover,
Melrose, Saugus, Danvers, Wakefield, and Reading.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.
&&
LAT...LON 4286 7085 4287 7082 4283 7081 4281 7087
4280 7083 4282 7082 4280 7081 4279 7076
4241 7096 4246 7124 4281 7110 4281 7107
4286 7103 4287 7097 4289 7093 4289 7090
TIME...MOT...LOC 1328Z 199DEG 30KT 4261 7105
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
LocontoThe Boston radar (KBOX), 57 km away, was scanning. The volume nearest the first event began at 13:28 UTC.
17 flood, 4 thunderstorm wind, 2 tornado, 1 flash flood. Local standard time, as filed.
In Shrewsbury, Mass DOT reported Rt 20 briefly closed in both direction.
In Hudson, the intersection of Main St and Chestnut St was flooded.
In Hopkinton, West Main St was flooded near I-495.
In Marlborough, Glen St and Ripley Ave were flooded.
In Framingham, parts of Henry St were flooded.
In Wilmington, parts of Nichols St was flooded.
In Wellesley, Great Plain Ave was flooded in both directions.
In Holliston, there was extensive flooding on Concord St (Rtd 126) at Ashland St.
In Fall River, several roads were flooded and impassable including Stafford Square and Globe St.
In New Bedford, there were several reports of vehicles stuck in flooding on Orchard St and River St with flooding also on Dartmouth St at Hickory St.
In North Andover, a senior housing center on Main St was underwater leading to the evacuation of 150 residents.
In Wilmington, Lowell St was closed between Woburn and Cross St due to flooding.
In Mattapoisett, there were trees and wires down on Hereford Hill Rd.
In Mattapoisett, there were trees and wires down on North St around Eldorado Dr.
A small EF-1 tornado touched down in the town of Mattapoisett Massachusetts|at 11:20 AM EDT. The storm was on the ground for approximately 3 minutes.|The storm moved to the northeast at approximately 20 MPH and lifted off the|ground on North Street just north of Eldorado Drive. Numerous large Pine and |Maple trees were uprooted falling in serveral directions. There were also |numerous pine trees along the path that were snapped off between 10 and 20|feet above the ground. The most concentrated damage was found along Eldorado|Drive by Granada Court. The top wind speed was estimated to be 95 mph.
In North Andover, there were flooded vehicles stuck on Massachusetts Ave under the I-495 overpass. High St in Andover was under several feet of water.
In Tewksbury, Chapman Rd was flooded at Jefferson Rd.
In Needham, there were several reports of flooding including on Great Plain Rd and on I-495.
In New Bedford, parts of Rt 18 was shut down due to flooding.
A small EF-0 tornado touched down in the town of Barnstable, near|the village of Marstons Mills, at 11:52 AM. The storm tracked ENE|from Evergreen Drive for approximately four minutes before |lifting over Joe Thompson Road, at approximately 11:56 AM. The |primary damage indicators were an uprooted hardwood tree and a|downed electrical pole, supplemented by strewn debris inclusive |of smaller trees, fence posts, and branches. The damage was most |concentrated near the center of the track at the intersection of |Race Lane and Osterville-West Barnstable Road. Witnesses described|a chaotic event, observing airborne fence posts and branches. Top wind speeds were estimated at 80 mph.
In Barnstable, there were several reports of trees and wires down blocking the road on West Barnstable Rd in Osterville.
In Barnstable, there was a tree down along Rt 6 near exit 68.
In Yarmouth, there was street flooding on Whites Path.
In Cambridge, there was flooding near Union Square.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Massachusetts in 2023Every state in 2023This day in weather historyThe tornado archive for Massachusetts, 2023Warnings in Massachusetts, August 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: 1119869, 1119870, 1119871, 1119872, 1119873, 1119874, 1119875, 1119876, 1119877, 1119878, 1119879, 1119880, 1119859, 1119861, 1119867, 1119881, 1119882, 1119883, 1119884, 1119868, 1119865, 1119866, 1119885, 1119886.