Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 78, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 23, 2020, 4:33 PM EDT for 5 counties in Massachusetts. It was in force for 57 min. 4 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, 4:33 PM EDT (20:33 UTC)
- Expired
- Jul 23, 2020, 5:30 PM EDT
- In force
- 57 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Essex County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA
The radar
The Boston radar (KBOX), 45 km from the middle of the area, began a volume at 20:34 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, 4:50 PM EDT | TSTM WND DMG | Boston, MA | POWER LINES DOWN AT MILTON AVENUE AND ROCKWELL STREET. |
| Jul 23, 4:50 PM EDT | TSTM WND DMG | Malden, MA | TREE DOWN AND BLOCKING FELLSWAY EAST. |
| Jul 23, 5:05 PM EDT | TSTM WND DMG | 2 Wsw Quincy, MA | TREE DOWN. |
| Jul 23, 5:15 PM EDT | TSTM WND DMG | 1 Wsw Winthrop, MA | WIRES AND A LARGE BRANCH DOWNED ON COURT ST IN WINTHROP. |
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 5 storm reports to this severe thunderstorm warning; the first came 7 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 111 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.
510
WUUS51 KBOX 232033
SVRBOX
MAC009-017-021-023-025-232130-
/O.NEW.KBOX.SV.W.0078.200723T2033Z-200723T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
433 PM EDT Thu Jul 23 2020
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
Suffolk County in eastern Massachusetts...
Northeastern Norfolk County in eastern Massachusetts...
South central Essex County in northeastern Massachusetts...
East central Middlesex County in northeastern Massachusetts...
Northern Plymouth County in southeastern Massachusetts...
* Until 530 PM EDT.
* At 433 PM EDT, a severe thunderstorm was located over Watertown,
moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Boston, Cambridge, Quincy, Lynn, Newton, Somerville, Waltham,
Malden, Brookline, Medford, Weymouth, Revere, Arlington, Everett,
Salem, Woburn, Chelsea, Watertown, Lexington and Needham.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Hail and damaging winds and continuous cloud to ground lightning is
occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4246 7094 4242 7091 4245 7097 4236 7097
4237 7105 4232 7100 4230 7105 4231 7097
4229 7102 4226 7097 4230 7093 4225 7096
4225 7088 4233 7093 4234 7088 4226 7087
4225 7077 4223 7118 4247 7125 4249 7086
TIME...MOT...LOC 2033Z 268DEG 28KT 4237 7121
HAIL...0.75IN
WIND...60MPH
$$
BW1 follow-up statement
532
WWUS51 KBOX 232107
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
507 PM EDT Thu Jul 23 2020
MAC009-017-232116-
/O.CAN.KBOX.SV.W.0078.000000T0000Z-200723T2130Z/
Essex MA-Middlesex MA-
507 PM EDT Thu Jul 23 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ESSEX AND EAST
CENTRAL MIDDLESEX COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
eastern and southeastern Massachusetts.
LAT...LON 4236 7105 4236 7104 4232 7100 4230 7105
4231 7097 4229 7102 4226 7097 4230 7093
4225 7096 4225 7088 4233 7093 4234 7088
4226 7087 4225 7077 4223 7118 4226 7118
TIME...MOT...LOC 2106Z 268DEG 28KT 4238 7086
$$
MAC021-023-025-232130-
/O.CON.KBOX.SV.W.0078.000000T0000Z-200723T2130Z/
Suffolk MA-Norfolk MA-Plymouth MA-
507 PM EDT Thu Jul 23 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHERN SUFFOLK...NORTHEASTERN NORFOLK AND NORTHERN PLYMOUTH
COUNTIES...
At 506 PM EDT, a severe thunderstorm was located over Hull, or 7
miles southeast of Revere, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Boston, Quincy, Weymouth, Milton, Dedham, Hingham, Hull and Cohasset.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4236 7105 4236 7104 4232 7100 4230 7105
4231 7097 4229 7102 4226 7097 4230 7093
4225 7096 4225 7088 4233 7093 4234 7088
4226 7087 4225 7077 4223 7118 4226 7118
TIME...MOT...LOC 2106Z 268DEG 28KT 4238 7086
HAIL...0.75IN
WIND...60MPH
$$
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, 2:14 PM EDT, 2 hours 19 minutes earlier.
Area forecast discussion, Jul 23, 2:14 PM EDT, 2 hours 19 minutes before
Area Forecast Discussion National Weather Service Boston/Norton MA 214 PM EDT Thu Jul 23 2020 .SYNOPSIS... Scattered thunderstorms will continue into early evening ahead of an approaching cold front. Some of the storms may produce damaging winds and torrential rainfall/localized flooding. Behind the front, not quite as hot or humid Friday along with mainly dry weather, just a slight chance of an isolated shower or thunderstorm across CT, RI and southeast MA. High pressure over New England Saturday provides dry weather and seasonably warm temperatures. The high moves offshore Sunday and Monday, circulating hot and humid weather back into the region. A slow moving cold front will likely result in scattered thunderstorms Tuesday and Wednesday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 210 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 the northern half of MA at mid afternoon. Despite poor mid level lapse rates...70 to 75 degree dewpoints have resulted in surface capes between 2500 and 3000 J/KG. SPC Meso-analysis also shows bulk effective shear has also increased to between 30 and 35 knots across much of the region, particularly across northern MA. As the shortwave and pre-frontal trough continue to press southeast, scattered thunderstorms should develop further south towards the Boston to Providence corridor and northern CT through late afternoon. Despite the poor mid level lapse rates and marginal shear, plenty of instability will result in some of the storms becoming strong to severe. Therefore, a Severe Thunderstorm Watch is in effect through 8 pm this evening for all but the Cape/Islands and south coast of RI. We do think the highest severe weather threat is across interior and northern portions of MA and perhaps into northern CT. Somewhat better shear/cape overlap exists in this region. Lastly, given 70 to 75 dewpoints and marginal shear the strongest thunderstorms will produce torrential rainfall. This will result in a very localized flash flood threat, particularly if a cluster of strong t-storms move over a vulnerable urban center. && .SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY NIGHT/... Tonight... The threat of severe storms shift south with the cold front but with the loss of diurnal heating after sunset, severe storms coverage will likely be more scattered in nature. Storms wind down by the pre- dawn hours as the cold front clears the South Coast. It will still remain very mild and muggy, however, with overnight lows in the mid 60s in the interior to low 70s in Eastern MA and RI. Friday... * Looks to be a mostly dry day but couldn't rule out afternoon thunderstorms, especially towards the S Coast. By the early morning hours, a positively tilted upper level trough lifts into Nova Scotia with rising H5 height fields. With light NW flow aloft, initial signs are that Friday could be a mostly dry day. The wildcard lies in the uncertainty of how far south the cold front goes. There are signs that it could stall as a stationary front just south of the south coast. Moreover, there are also indications of up to 1000 J/kg of CAPE so have kept at least a slight chance of PoPs for much of the interior and higher chances south of the MA Pike. But K indices look to fall sharply behind the cold front from the 30s to the teens and even the single digits in the interior, indicative of the intrusion of mid-level dry air. With mixing up to 850mb and 850mb temperatures between +13C to +15C, afternoon highs should top out in the mid 80s. With dew points falling into the upper 50s to mid 60s, it will feel quite comfortable. && .LONG TERM /SATURDAY THROUGH WEDNESDAY/... 323 am update... Highlights... * Dry weather Sat, Sun and possibly into Mon then an active convective pattern beginning Tue and continuing into at least mid week * Seasonably warm/humid Saturday then possible three day heat wave Sunday, Monday and Tuesday Temperatures... Low amplitude mean trough over New England briefly erodes northern periphery of subtropical ridge resulting in seasonable temps and humidity for late July Fri night and Sat. With 1020 mb high pressure over the region Friday night, sided with the slightly cooler MOS guidance. In fact few places across western MA may dip into the upper 50s! Saturday looks like the pick of the week especially after a coolish Fri night then dry WNW flow aloft, seasonably warm with highs in the mid to upper 80s and dew pts in the 60s. By Sunday, excessive heat and humidity associated with subtropical ridge over the central U.S. begins to advect eastward with ECENS warming 850 mb temps to +19C over New England Sunday, then peaking to 20C Monday before lowering to about +18C by Tuesday as high amplitude trough enters the Great Lakes. These temps aloft may support a three day heat wave for many locations in MA/RI/CT Sunday, Monday and Tuesday. Good model agreement Monday will likely be the hottest day with probability of 90+ temps between 90-100% and highs likely in the mid 90s. Highs likely fall back into the 80s Wed as approaching high amplitude trough entering the Great Lakes begins to erode northern periphery of subtropical ridge. Precipitation... Dry WNW flow aloft should yield mainly convective-free weather Saturday, Sunday and possibly Monday. However by Tue and especially Wed ECENS continuing to signal a fairly high amplitude trough (at least by July standards) entering the Great Lakes Tue and edging closer to New England Wed. This should yield a fairly active convective pattern for New England beginning Tue and continuing at least into Wed if not beyond. && .AVIATION /18Z 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 /Saturday through Monday/... Saturday through Saturday Night: VFR. Sunday through Sunday Night: VFR. Breezy. Monday: Mainly VFR, with local MVFR possible. Breezy. Slight chance SHRA, slight chance TSRA. && .MARINE... 340 AM Update... Winds and seas remain below Small Craft Advisory criteria through Friday night. A cold front on Thursday brings the risk for thunderstorms, some of which may be strong Thursday afternoon into evening. Outlook /Saturday through Monday/... Friday Night: Winds less than 25 kt. Patchy fog. Saturday through Sunday: Winds less than 25 kt. Sunday Night through Monday: Winds less than 25 kt. Areas of seas approaching 5 ft. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...None. MA...None. RI...None. MARINE...None. && SYNOPSIS...Nocera/Chai NEAR TERM...Frank SHORT TERM...Chai LONG TERM...Nocera AVIATION...Frank/Nocera MARINE...Nocera/Chai
Hazardous weather outlook, Jul 23, 4:23 PM EDT, 10 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 23 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, 46 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, 29 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, 28 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, 8 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, 6 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, 4:35 PM EDT | Areal Flood Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 48 min |
| Jul 23, 4:38 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth, Worcester | 67 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 |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 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.