Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 79, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 23, 2020, 4:38 PM EDT for 4 counties in Massachusetts; Northeastern Connecticut Planning Region, Connecticut; Providence County, Rhode Island. It was in force for 67 min. 6 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 23, 2020, 4:38 PM EDT (20:38 UTC)
- Expired
- Jul 23, 2020, 5:45 PM EDT
- In force
- 67 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Northeastern Connecticut Planning Region, CT, Bristol County, MA, Norfolk County, MA, Plymouth County, MA, Worcester County, MA, Providence County, RI
The radar
The Boston radar (KBOX), 33 km from the middle of the area, began a volume at 20:42 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 5:05 PM EDT | TSTM WND DMG | 2 Sse Douglas, MA | TREE DOWN ON POWER LINES ON HEMLOCK ST IN DOUGLAS. |
| Jul 23, 5:20 PM EDT | TSTM WND DMG | 1 Nw Franklin, MA | TREE DOWN ON MOORE AVE IN FRANKLIN. |
| Jul 23, 5:20 PM EDT | TSTM WND DMG | Brockton, MA | TREE DOWN ON LISA DR |
| Jul 23, 5:20 PM EDT | TSTM WND DMG | Franklin, MA | TREE DOWNED ON PHILOMENA WAY IN FRANKLIN. |
| Jul 23, 5:25 PM EDT | TSTM WND DMG | 2 Sw Wrentham, MA | POWER LINES AND A LARGE TREE BRANCH DOWNED ON BENNETT ST IN WRENTHAM. |
| Jul 23, 5:30 PM EDT | TSTM WND DMG | Avon, MA | THE TOP OF A TREE WAS DOWNED AND BLOCKING PART OF PINEWOOD RD IN AVON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 6 storm reports to this severe thunderstorm warning; the first came 27 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 23, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Chatham, MA (KCHH), launched 12:00Z, 8.6 hours before the alert went out and 135 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 76 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1267 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
074 WUUS51 KBOX 232038 SVRBOX CTC015-MAC005-021-023-027-RIC007-232145- /O.NEW.KBOX.SV.W.0079.200723T2038Z-200723T2145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Boston/Norton MA 438 PM EDT Thu Jul 23 2020 The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for... Northeastern Windham County in northern Connecticut... Southern Norfolk County in eastern Massachusetts... Southeastern Worcester County in central Massachusetts... West central Plymouth County in southeastern Massachusetts... Northwestern Bristol County in southeastern Massachusetts... Northern Providence County in Rhode Island... * Until 545 PM EDT. * At 438 PM EDT, a severe thunderstorm was located near Douglas, or 10 miles west of Woonsocket, moving east at 40 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. * Locations impacted include... Brockton, Taunton, Woonsocket, Cumberland, Randolph, Franklin, North Attleborough, Milford, Stoughton, Bridgewater, Attleboro, Walpole, Mansfield, Middleborough, Easton, Canton, Smithfield, Lincoln, Norton and Sharon. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4193 7195 4211 7183 4215 7098 4192 7095 TIME...MOT...LOC 2038Z 264DEG 33KT 4203 7170 HAIL...0.75IN WIND...60MPH $$ BL
3 follow-up statements
485
WWUS51 KBOX 232115
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
515 PM EDT Thu Jul 23 2020
CTC015-MAC027-232125-
/O.CAN.KBOX.SV.W.0079.000000T0000Z-200723T2145Z/
Windham CT-Worcester MA-
515 PM EDT Thu Jul 23 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WINDHAM AND
SOUTHEASTERN WORCESTER COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
eastern and southeastern Massachusetts...and Rhode Island.
LAT...LON 4193 7156 4213 7132 4215 7098 4192 7095
TIME...MOT...LOC 2115Z 260DEG 29KT 4204 7132
$$
MAC005-021-023-RIC007-232145-
/O.CON.KBOX.SV.W.0079.000000T0000Z-200723T2145Z/
Norfolk MA-Plymouth MA-Bristol MA-Providence RI-
515 PM EDT Thu Jul 23 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHERN NORFOLK...WEST CENTRAL PLYMOUTH...NORTHWESTERN BRISTOL
AND NORTHEASTERN PROVIDENCE COUNTIES...
At 515 PM EDT, a severe thunderstorm was located over Wrentham, or
near North Attleborough, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Brockton, Taunton, Woonsocket, Cumberland, Randolph, Franklin, North
Attleborough, Stoughton, Bridgewater, Attleboro, Walpole, Mansfield,
Middleborough, Easton, Smithfield, Lincoln, Norton, Sharon,
Foxborough and Abington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4193 7156 4213 7132 4215 7098 4192 7095
TIME...MOT...LOC 2115Z 260DEG 29KT 4204 7132
HAIL...0.75IN
WIND...60MPH
$$
BL015
WWUS51 KBOX 232131
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
531 PM EDT Thu Jul 23 2020
MAC005-021-023-RIC007-232145-
/O.CON.KBOX.SV.W.0079.000000T0000Z-200723T2145Z/
Norfolk MA-Plymouth MA-Bristol MA-Providence RI-
531 PM EDT Thu Jul 23 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN NORFOLK...WEST CENTRAL PLYMOUTH...NORTHWESTERN
BRISTOL AND NORTHEASTERN PROVIDENCE COUNTIES...
At 531 PM EDT, a severe thunderstorm was located over Easton, or near
Stoughton, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Brockton, Taunton, Cumberland, Randolph, North Attleborough,
Stoughton, Bridgewater, Attleboro, Mansfield, Middleborough, Easton,
Norton, Sharon, Foxborough, Abington, Whitman, East Bridgewater,
Raynham, Holbrook and Plainville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4193 7141 4203 7131 4214 7108 4215 7098
4192 7095
TIME...MOT...LOC 2131Z 264DEG 33KT 4206 7112
HAIL...0.75IN
WIND...60MPH
$$
BW223
WWUS51 KBOX 232141
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
541 PM EDT Thu Jul 23 2020
MAC005-021-023-RIC007-232151-
/O.EXP.KBOX.SV.W.0079.000000T0000Z-200723T2145Z/
Norfolk MA-Plymouth MA-Bristol MA-Providence RI-
541 PM EDT Thu Jul 23 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NORFOLK...WEST
CENTRAL PLYMOUTH...NORTHWESTERN BRISTOL AND NORTHEASTERN PROVIDENCE
COUNTIES WILL EXPIRE AT 545 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
eastern and southeastern Massachusetts...and Rhode Island.
LAT...LON 4193 7141 4203 7131 4214 7108 4215 7098
4192 7095
TIME...MOT...LOC 2141Z 264DEG 33KT 4207 7102
$$
BWWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jul 23, 4:34 PM EDT, 4 minutes earlier.
Area forecast discussion, Jul 23, 4:34 PM EDT, 4 minutes before
Area Forecast Discussion National Weather Service Boston/Norton MA 434 PM EDT Thu Jul 23 2020 .SYNOPSIS... Scattered thunderstorms will continue into the evening ahead of an approaching cold front. Some of the storms may produce localized damaging wind gusts along with torrential rainfall/localized flooding. Behind the front, not quite as hot or humid Friday along with mainly dry weather except for a few showers possible near the south coast. Drying-out for the weekend. Saturday appears to be a rather comfortable day and likely the pick of the weekend. Oppressive heat and humidity does return Sunday through early next week. A frontal boundary brings showers and storms to southern New England by mid next week. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... 430 PM Update.. * Severe Thunderstorm Watch into this evening for the entire region except for the Cape/Islands and the south coast of RI * Localized flood threat exists too Scattered to numerous thunderstorms have developed across western/central and northern MA and now were working their way into northern CT and I-95 corridor late this afternoon. Despite poor mid level lapse rates...70 to 75 degree dewpoints have resulted in surface capes between 2500 and 3000 J/KG. This combined with bulk shear of 30 to 35 knots was enough for some of the storms to become strong to severe, producing localized damaging wind gusts. In addition, high Pwats on the order of 2+ inches was resulting in torrential rainfall with the strongest storms. This has allowed for localized flooding, especially across northeast MA where training thunderstorms have resulted in significant urban flooding. The shortwave/pre-frontal trough will continue to push southeast into the first half of the evening. While the forcing/shear is not quite across RI/southeast MA plenty of instability remains. Therefore, a few strong to severe thunderstorms will remain possible into the evening. In addition, modest Cape values persist across parts of NH/VT which has allowed additional scattered convection to develop to our north. Therefore, a few more strong to severe t- storms will be possible across our interior zones and northern MA into the evening with the main threat being locally damaging straight line wind gusts. Therefore, the Severe Thunderstorm Watch continues through 8 PM for all but the south coast of RI as well as Cape Cod/Islands. Torrential rainfall with the strongest storms will continue to pose a localized urban flood threat. The bulk of the showers and thunderstorms should wind down by late evening as the frontal boundary sags towards the south coast. However, the boundary does stall out near the south coast coupled with a modest southwest LLJ. This may allowed scattered showers and a few thunderstorms to persist overnight near the south coast, Cape and Islands. Meanwhile, across the rest of the region partial clearing may occur in some locations allowing for the formation of patchy dense ground fog in the typically prone locations. Overnight low temps should bottom out in the middle 60s to the lower 70s. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/... * Mainly dry and a bit less humid Friday, but a few showers will remain possible mainly towards the south coast Friday... The frontal boundary will remain stalled out near the south coast on Friday. This combined with high pressure across the Canadian Maritimes will result in drier northeast flow of air across much of the region. Expect partial sunshine with high temps mainly in the middle to upper 80s, although it will be a few degrees cooler along the immediate coast with sea breezes. Dewpoints will remain in the 60s, but it will not be quite as oppressive as today. Dry weather should dominate, but a few low topped showers will remain possible mainly towards the south coast near the frontal boundary. && .LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/... Highlights... * Sunny and dry weather through the weekend and into early next week * Seasonably comfortable to start the weekend, then becoming hot and humid with a possible heatwave Sunday/Monday/Tuesday Friday night through Saturday... Weak surface trough will move off shore during the predawn hours of Saturday, behind it, 1020 mb high. The area of high pressure will move south out of Ontario and into the Great Lakes Region Saturday. Clouds will clear from northwest to southeast overnight. A few areas could see their morning lows dip down into the upper-50s across northwest Massachusetts, great sleeping weather! The remainder of southern New England is still comfortable, but a bit warmer, in the low and middle-60s. Saturday afternoon and evening still appears to be the pick of the weekend with dry and sunny weather. Additionally, the dewpoint values are in the 50s and lower-60s. 850 mb temperatures are forecast between +15C and +18C and we should mix down. Mixing to 850 mb would yield temperatures between the mid-80s to the lower-90s. Those nearing the low-90s would be the Merrimack and Connecticut Valley. Sunday though Tuesday... Whether you like it or not, the heat and humidity returns. At 850 mb the temperature, each day, ranges between +17C and +20C. Mixing those temperatures down should give us daily high temperatures in the upper-80s to the middle-90s, plus daily dewpoints in the upper- 60s to middle-70s. As previously mentioned, models agree that Monday will likely be the hottest day with the probability of 90+ temperatures between 90% and 100%. Headlines for a 'heat advisory' will likely be needed once again as we enter our next heatwave. Tuesday late afternoon could feature an isolated pop-up thunderstorm, otherwise, dry conditions will persist. Wednesday through Thursday... A frontal boundary will move across southern New England during the middle part of next week. Models are still not in the best of agreement on which day. The Euro has this front moving through Wednesday afternoon and the GFS on Tuesday afternoon. We are still several days away and will continue to monitor future developments. && .AVIATION /21Z THURSDAY THROUGH TUESDAY/... 18z Update... Forecaster Confidence Levels... Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent. This afternoon...High confidence in trends, but lower confidence in trends. Scattered to numerous thunderstorms have developed across northern MA. This activity will push southeast towards the Boston to Providence through 21z-22z. So while VFR conditions are expected outside the t-storms, IFR-LIFR along with locally strong winds are expected within thunderstorms. Tonight...High confidence in trends, but lower confidence in timing. The scattered thunderstorm threat will end across much of the region by 02z-03z, but persist a bit longer in parts of RI/SE MA. Otherwise, VFR conditions dominate but IFR to even LIFR conditions may develop across the Cape/Islands in lower clouds and fog. More patchy fog may develop overnight in the typically prone locations. Winds becoming light overnight. Friday...High confidence. VFR with any remaining low clouds/fog burning off during the morning across the Cape/Islands. Isolated showers possible Fri afternoon mainly towards the south coast, but the areal coverage will be limited. NE winds 5 to 10 knots. KBOS Terminal...High confidence in TAF. Scattered thunderstorms expected between 19z and 23z. KBDL Terminal...High confidence in TAF. Scattered thunderstorms expected between 19z and 23z. Outlook /Friday Night through Tuesday/... Friday Night through Saturday Night: VFR. Sunday through Sunday Night: VFR. Breezy. Monday: VFR. Breezy. Slight chance SHRA, slight chance TSRA. Monday Night: VFR. Breezy. Slight chance SHRA. Tuesday: VFR. Breezy. Slight chance SHRA, slight chance TSRA. && .MARINE... Tonight and Friday...High confidence. Main concern will be a few strong thunderstorms tonight. Initially they will be along the waters adjacent to the eastern MA coast, but push further south towards the south coastal waters later this evening and overnight. There may also be some fog that develops overnight across our southern waters. Vsbys should improve though on Friday with winds/seas remaining below SCA thresholds outside of a few strong t-storms tonight. Outlook /Friday Night through Tuesday/... Friday Night through Saturday Night: Winds less than 25 kt. Sunday: Winds less than 25 kt. Seas locally approaching 5 ft. Sunday Night through Monday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers, slight chance of thunderstorms. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...None. && SYNOPSIS...Frank/Gaucher NEAR TERM...Frank SHORT TERM...Frank LONG TERM...Gaucher AVIATION...Frank/Gaucher MARINE...Frank/Gaucher
Hazardous weather outlook, Jul 23, 4:23 PM EDT, 15 minutes before
Hazardous Weather Outlook National Weather Service Boston/Norton MA 423 PM EDT Thu Jul 23 2020 CTZ003-004-MAZ017>021-RIZ001>004-242030- Tolland CT-Windham CT-Northern Bristol MA-Western Plymouth MA- Eastern Plymouth MA-Southern Bristol MA-Southern Plymouth MA- Northwest Providence RI-Southeast Providence RI-Western Kent RI- Eastern Kent RI- 423 PM EDT Thu Jul 23 2020 ...SEVERE THUNDERSTORM WATCH 395 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern Connecticut, southeastern Massachusetts and northern Rhode Island. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MAZ022>024-RIZ005>008-242030- Barnstable MA-Dukes MA-Nantucket MA-Bristol RI-Washington RI- Newport RI-Block Island RI- 423 PM EDT Thu Jul 23 2020 This Hazardous Weather Outlook is for southeastern Massachusetts, northern Rhode Island and southern Rhode Island. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ231>237-250-254>256-242030- 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- 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- 423 PM EDT Thu Jul 23 2020 This Hazardous Weather Outlook is for Massachusetts coastal waters and Rhode Island coastal waters. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ230-251-242030- Boston Harbor-Massachusetts Bay and Ipswich Bay- 423 PM EDT Thu Jul 23 2020 ...SEVERE THUNDERSTORM WATCH 395 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for Massachusetts coastal waters. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CTZ002-MAZ002>016-026-242030- Hartford 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 Middlesex MA- 423 PM EDT Thu Jul 23 2020 ...SEVERE THUNDERSTORM WATCH 395 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern Connecticut, central Massachusetts, eastern Massachusetts, northeastern Massachusetts and western 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. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. 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/us.nationalweatherservice.boston.gov You can follow us on Twitter at @NWSBoston
In the hours before
Special weather statement, Jul 23, 3:10 PM EDT, 1 hour 28 minutes before
Special Weather Statement
National Weather Service Boston/Norton MA
310 PM EDT Thu Jul 23 2020
CTZ002-MAZ009-011-232000-
Hartford CT-Western Hampden MA-Eastern Hampden MA-
310 PM EDT Thu Jul 23 2020
...STRONG THUNDERSTORM MOVING INTO WESTERN HARTFORD AND HAMPDEN
COUNTIES...
At 310 PM EDT, Doppler radar was tracking a strong thunderstorm near
Tolland, or 13 miles north of Torrington, moving southeast at 25 mph.
Pea size hail and wind gusts up to 50 mph will accompany this storm.
Locations impacted include...
Hartford, West Hartford, Enfield, Windsor, Simsbury, Bloomfield,
Avon, Suffield, Windsor Locks, Granby, East Windsor, Canton,
Southwick, East Granby, Hartland, Granville and Tolland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.
Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.
&&
LAT...LON 4213 7306 4199 7254 4175 7269 4186 7295
4189 7294 4190 7291 4197 7289 4197 7303
4204 7301 4204 7306 4206 7305 4211 7307
TIME...MOT...LOC 1910Z 294DEG 23KT 4203 7308
BWSpecial weather statement, Jul 23, 3:47 PM EDT, 51 minutes before
Special Weather Statement
National Weather Service Boston/Norton MA
347 PM EDT Thu Jul 23 2020
MAZ005>007-014-232030-
Eastern Essex MA-Central Middlesex County MA-Western Essex MA-
Southeast Middlesex MA-
347 PM EDT Thu Jul 23 2020
...STRONG THUNDERSTORM OVER CENTRAL ESSEX COUNTY...
At 346 PM EDT, Doppler radar was tracking a strong thunderstorm over
Middleton, or near Danvers, moving east at 35 mph.
Winds in excess of 40 mph will accompany this storm.
Locations impacted include...
Lynn, Lawrence, Peabody, Salem, Billerica, Beverly, Woburn, Andover,
Dracut, Tewksbury, Gloucester, North Andover, Danvers, Wakefield,
Reading, Burlington, Wilmington, Stoneham, Marblehead and North
Reading.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.
&&
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
northeastern Massachusetts.
LAT...LON 4267 7073 4264 7076 4269 7063 4265 7059
4258 7066 4259 7066 4260 7065 4261 7066
4253 7078 4256 7078 4254 7090 4253 7089
4251 7085 4251 7095 4249 7123 4267 7126
4274 7082 4270 7083 4275 7079
TIME...MOT...LOC 1946Z 261DEG 32KT 4261 7102
BLSpecial weather statement, Jul 23, 4:04 PM EDT, 34 minutes before
Special Weather Statement National Weather Service Boston/Norton MA 404 PM EDT Thu Jul 23 2020 CTZ002-003-232045- Hartford CT-Tolland CT- 404 PM EDT Thu Jul 23 2020 ...STRONG THUNDERSTORM OVER NORTHERN HARTFORD COUNTY... At 404 PM EDT, Doppler radar was tracking a strong thunderstorm over East Granby, or near Windsor, moving east at 25 mph. Winds in excess of 40 mph will accompany this storm. Locations impacted include... Hartford, West Hartford, Manchester, East Hartford, Enfield, Glastonbury, Vernon, Windsor, Mansfield, South Windsor, Simsbury, Bloomfield, Avon, Suffield, Ellington, Tolland, Windsor Locks, Coventry, Stafford and Somers. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors when this storm approaches. Winds may be strong enough to produce minor damage, such as a few downed branches. && LAT...LON 4203 7273 4191 7222 4163 7238 4188 7295 TIME...MOT...LOC 2003Z 289DEG 22KT 4192 7273 BL
Special weather statement, Jul 23, 4:05 PM EDT, 33 minutes before
Special Weather Statement National Weather Service Boston/Norton MA 405 PM EDT Thu Jul 23 2020 MAZ004-005-012>014-232045- Southern Worcester MA-Western Norfolk MA-Central Middlesex County MA- Northern Worcester MA-Southeast Middlesex MA- 405 PM EDT Thu Jul 23 2020 ...STRONG THUNDERSTORM... At 404 PM EDT, Doppler radar was tracking a strong thunderstorm over Northborough, or near Marlborough, moving east at 25 mph. Pea size hail and winds in excess of 40 mph will accompany this storm. Locations impacted include... Newton, Framingham, Waltham, Billerica, Marlborough, Shrewsbury, Natick, Lexington, Needham, Wellesley, Acton, Hudson, Westborough, Grafton, Concord, Sudbury, Ashland, Hopkinton, Northborough and Clinton. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors when this storm approaches. Winds may be strong enough to produce minor damage, such as a few downed branches. Do not drive through flooded roads or underpasses. Avoid low lying areas near small streams. Frequent lightning was occurring. Lightning can strike far away from the storm. Go inside a building or vehicle. Wait at least 30 minutes until after the storm has passed to resume outdoor activities. && LAT...LON 4254 7126 4228 7120 4223 7166 4241 7171 TIME...MOT...LOC 2004Z 260DEG 23KT 4234 7161 BW
Local storm report, Jul 23, 4:25 PM EDT, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAUNTON MA
425 PM EDT THU JUL 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0238 PM FLOOD DEERFIELD 42.55N 72.60W
07/23/2020 FRANKLIN MA AMATEUR RADIO
FLOODING WAIST-DEEP ON SOUTH RIVER STREET.
0240 PM TSTM WND DMG GRANBY 42.26N 72.53W
07/23/2020 HAMPSHIRE MA AMATEUR RADIO
HARRIS STREET AND SURROUNDING STREETS HAVE SEVERAL TREES
AND LARGE LIMBS DOWN.
0252 PM TSTM WND DMG BELCHERTOWN 42.27N 72.40W
07/23/2020 HAMPSHIRE MA AMATEUR RADIO
TREE DOWN BLOCKING WARREN WRIGHT ROAD.
0252 PM TSTM WND DMG BELCHERTOWN 42.27N 72.40W
07/23/2020 HAMPSHIRE MA AMATEUR RADIO
ONE LARGE TREE AND ONE LARGE TREE BRANCH DOWN ON WIRES ON
GEORGE HANNUM ROAD. TREE DOWN BLOCKING BAY ROAD. LARGE
TREE DOWN ON WIRES ON HAMILTON STREET.
0303 PM FLOOD METHUEN 42.72N 71.18W
07/23/2020 ESSEX MA AMATEUR RADIO
LOWELL STREET IMPASSABLE DUE TO FLOOD WATERS. TWO CARS
TRAPPED.
0308 PM FLOOD LAWRENCE 42.70N 71.16W
07/23/2020 ESSEX MA AMATEUR RADIO
EAST HAVERHILL STREET AT BERKLEY STREET, SHERIDAN STREET
AT BERKLEY, BERKLEY STREET AT JACKSON STREET ARE ALL
FLOODED AND IMPASSABLE.
0308 PM FLOOD METHUEN 42.72N 71.18W
07/23/2020 ESSEX MA AMATEUR RADIO
BROADWAY AT NEVINS MANOR IS FLOODED AND IMPASSABLE.
0310 PM TSTM WND DMG ANDOVER 42.66N 71.14W
07/23/2020 ESSEX MA AMATEUR RADIO
TREE DOWN ON WIRES ON CHANDLER ROAD. TREE DOWN ON WIRES
ON GREENWOOD ROAD.
0310 PM TSTM WND DMG NORTH READING 42.57N 71.07W
07/23/2020 MIDDLESEX MA AMATEUR RADIO
TREE DOWN BLOCKING LOWELL ROAD
0312 PM FLOOD LAWRENCE 42.70N 71.16W
07/23/2020 ESSEX MA AMATEUR RADIO
PARKER STREET CLOSED AT THE BRIDGE DUE TO FLOODING.
0313 PM FLOOD METHUEN 42.72N 71.18W
07/23/2020 ESSEX MA AMATEUR RADIO
STATE ROUTE 110 AT OAK STREET FLOODED AND IMPASSABLE.
0315 PM TSTM WND DMG BEVERLY 42.56N 70.84W
07/23/2020 ESSEX MA AMATEUR RADIO
TREE DOWN ON ESSEX STREET AND PARTIALLY BLOCKING THE
ROAD.
0315 PM TSTM WND DMG AMESBURY 42.86N 70.93W
07/23/2020 ESSEX MA AMATEUR RADIO
TREE DOWN ON PLEASANT VALLEY ROAD
0320 PM FLOOD GEORGETOWN 41.26N 73.43W
07/23/2020 FAIRFIELD CT AMATEUR RADIO
WEST MAIN STREET AND SEVERAL OTHER STREETS FLOODED AND
IMPASSABLE.
0322 PM FLOOD METHUEN 42.72N 71.18W
07/23/2020 ESSEX MA AMATEUR RADIO
JACKSON STREET FLOODED AND IMPASSABLE.
0326 PM FLOOD NEWBURYPORT 42.81N 70.89W
07/23/2020 ESSEX MA AMATEUR RADIO
WATER STREET AT FEDERAL STREET FLOODED AND IMPASSABLE.
ONE CAR TRAPPED IN THE FLOODING.
0337 PM TSTM WND DMG PRINCETON 42.45N 71.87W
07/23/2020 WORCESTER MA AMATEUR RADIO
TREE DOWN ON MOUNTAIN ROAD.
0342 PM FLOOD BEVERLY 42.56N 70.84W
07/23/2020 ESSEX MA AMATEUR RADIO
RIVER STREET FLOODED. TWO CARS TRAPPED.
0342 PM FLOOD NEWBURYPORT 42.81N 70.89W
07/23/2020 ESSEX MA AMATEUR RADIO
SIX INCHES OF STREET FLOODING ON PLUM ISLAND TURNPIKE.
0345 PM FLOOD ANDOVER 41.73N 72.37W
07/23/2020 TOLLAND CT AMATEUR RADIO
LOWELL STREET AND STATE ROUTE 113 EASTBOUND FLOODED.
0346 PM FLOOD BEVERLY 42.56N 70.84W
07/23/2020 ESSEX MA AMATEUR RADIO
CABOT STREET FROM MILTON STREET TO CHURCH STREET FLOODED
AND IMPASSABLE.
0410 PM FLOOD GLOUCESTER 42.62N 70.65W
07/23/2020 ESSEX MA AMATEUR RADIO
MAPLEWOOD AVENUE FLOODED AND IMPASSABLE.
&&
WTBSpecial weather statement, Jul 23, 4:27 PM EDT, 11 minutes before
Special Weather Statement National Weather Service Boston/Norton MA 427 PM EDT Thu Jul 23 2020 CTZ004-MAZ012-013-RIZ001-232100- Windham CT-Southern Worcester MA-Western Norfolk MA- Northwest Providence RI- 427 PM EDT Thu Jul 23 2020 ...STRONG THUNDERSTORM... At 427 PM EDT, Doppler radar was tracking a strong thunderstorm over Webster, or 16 miles south of Worcester, moving east at 25 mph. Wind gusts up to 50 mph will accompany this storm. Locations impacted include... Woonsocket, Smithfield, Webster, Bellingham, Burrillville, Northbridge, Oxford, Uxbridge, Charlton, North Smithfield, Dudley, Glocester, Putnam, Thompson, Blackstone, Sutton, Douglas, Woodstock, Hopedale and Mendon. PRECAUTIONARY/PREPAREDNESS ACTIONS... Get indoors when this storm approaches. Winds may be strong enough to produce minor damage, such as a few downed branches. Do not drive through flooded roads or underpasses. Avoid low lying areas near small streams. Frequent lightning was occurring. Lightning can strike far away from the storm. Go inside a building or vehicle. Wait at least 30 minutes until after the storm has passed to resume outdoor activities. && A Severe Thunderstorm Watch remains in effect until 800 PM EDT for northern Connecticut...eastern and central Massachusetts...and Rhode Island. LAT...LON 4194 7200 4211 7193 4212 7148 4190 7153 TIME...MOT...LOC 2027Z 280DEG 22KT 4204 7188 BL
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 8:12 PM EDT | Special Weather Statement | BOX | Hampshire | 48 min |
| Jul 23, 1:33 PM EDT | Special Weather Statement | BOX | Franklin | 42 min |
| Jul 23, 1:45 PM EDT | Special Weather Statement | BOX | Essex | 30 min |
| Jul 23, 1:51 PM EDT | Special Weather Statement | BOX | Hampshire | 54 min |
| Jul 23, 1:59 PM EDT | Severe Thunderstorm Warning | BOX | Essex | 23 min |
| Jul 23, 2:10 PM EDT | Special Weather Statement | BOX | Middlesex | 50 min |
| Jul 23, 2:15 PM EDT | Special Weather Statement | BOX | Hampshire | 45 min |
| Jul 23, 2:16 PM EDT | Special Marine Warning | BOX | 59 min | |
| Jul 23, 2:21 PM EDT | Special Marine Warning | BOX | 54 min | |
| Jul 23, 2:33 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 43 min |
| Jul 23, 2:33 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 45 min |
| Jul 23, 2:37 PM EDT | Special Marine Warning | BOX | 53 min | |
| Jul 23, 2:39 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Middlesex, Worcester | 39 min |
| Jul 23, 2:48 PM EDT | Special Weather Statement | BOX | Essex | 57 min |
| Jul 23, 3:01 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 37 min |
| Jul 23, 3:03 PM EDT | Flash Flood Warning | BOX | Essex | 72 min |
| Jul 23, 3:09 PM EDT | Special Marine Warning | BOX | 66 min | |
| Jul 23, 3:20 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 55 min |
| Jul 23, 3:33 PM EDT | Special Marine Warning | BOX | 57 min | |
| Jul 23, 3:47 PM EDT | Special Weather Statement | BOX | Essex | 43 min |
| Jul 23, 4:05 PM EDT | Special Weather Statement | BOX | Middlesex | 40 min |
| Jul 23, 4:19 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 56 min |
| Jul 23, 4:32 PM EDT | Special Marine Warning | BOX | 58 min | |
| Jul 23, 4:33 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 57 min |
| Jul 23, 4:35 PM EDT | Areal Flood Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 48 min |
| Jul 23, 4:45 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Plymouth, Suffolk | 60 min |
| Jul 23, 4:50 PM EDT | Special Marine Warning | BOX | 55 min | |
| Jul 23, 5:29 PM EDT | Special Marine Warning | BOX | 61 min | |
| Jul 23, 6:03 PM EDT | Special Weather Statement | BOX | Hampden | 27 min |
| Jul 23, 6:07 PM EDT | Special Weather Statement | BOX | Plymouth | 23 min |
| Jul 23, 6:28 PM EDT | Special Marine Warning | BOX | 62 min | |
| Jul 23, 6:30 PM EDT | Special Marine Warning | BOX | 60 min | |
| Jul 23, 6:34 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Plymouth | 41 min |
| Jul 23, 3:10 PM EDT | Special Weather Statement | BOX | 50 min | |
| Jul 23, 4:04 PM EDT | Special Weather Statement | BOX | 41 min | |
| Jul 23, 4:12 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 63 min |
| Jul 23, 5:00 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 60 min |
| Jul 23, 7:16 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 59 min |
| Jul 23, 4:27 PM EDT | Special Weather Statement | BOX | Providence | 33 min |
| Jul 23, 5:18 PM EDT | Special Weather Statement | BOX | Providence | 42 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2020Severe Thunderstorm Warnings in Connecticut, 2020Severe Thunderstorm Warnings in Rhode Island, 2020Every severe thunderstorm warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.