Alert archive / Massachusetts / Tornado Warnings in 2023
Tornado Warning 7, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this tornado warning at Jul 29, 2023, 8:32 PM EDT for Bristol County, Plymouth County, Massachusetts. It was in force for 28 min. 5 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 29, 2023, 8:32 PM EDT (00:32 UTC)
- Expired
- Jul 29, 2023, 9:00 PM EDT
- In force
- 28 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Bristol County, MA, Plymouth County, MA
The radar
The Boston radar (KBOX), 38 km from the middle of the area, began a volume at 00:36 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 29, 8:35 PM EDT | TSTM WND DMG | Brockton, MA | In Brockton, a tree was down on the Route 24 Northbound Exit 33 onramp. Wires were down on West Chestnut Street. A tree and utility pole were down on East Street at Nessralla Drive. A large tree was down on a high tension transmission power line, per EMD. Repo |
| Jul 29, 8:35 PM EDT | TSTM WND DMG | Brockton, MA | In Brockton, a tree was down on the Route 24 Northbound Exit 33 onramp. Wires were down on West Chestnut Street. Reports relayed by amateur radio. |
| Jul 29, 8:45 PM EDT | TSTM WND DMG | 1 N West Bridgewater, MA | In West Bridgewater, trees and wires were down on Matfield Street. A tree was down on Brewster Blvd. A large tree was down on power lines on West Street, near the Easton line. Reports relayed by amateur radio. |
| Jul 29, 8:45 PM EDT | TSTM WND DMG | 1 N West Bridgewater, MA | In West Bridgewater, trees and wires were down on Matfield Street. A tree was down on Brewster Blvd. Reports relayed by amateur radio. |
| Jul 29, 8:55 PM EDT | TSTM WND DMG | 3 Se Pembroke, MA | In Duxbury, a tree was down on Birch Street, one-half mile from Route 53. Report relayed by amateur radio. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 29, 1:33 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Gray, ME (KGYX), launched 00:00Z, 0.5 hours before the alert went out and 212 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 446 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 339 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
926
WFUS51 KBOX 300032
TORBOX
MAC005-023-300100-
/O.NEW.KBOX.TO.W.0007.230730T0032Z-230730T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
832 PM EDT Sat Jul 29 2023
The National Weather Service in Boston/Norton has issued a
* Tornado Warning for...
Central Plymouth County in southeastern Massachusetts...
Northern Bristol County in southeastern Massachusetts...
* Until 900 PM EDT.
* At 831 PM EDT, a severe thunderstorm capable of producing a tornado
was located over West Bridgewater, or over Bridgewater, moving east
at 45 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Bridgewater, Middleborough, Pembroke, Rockland, Duxbury, Whitman,
Hanover, East Bridgewater, Kingston and Carver around 835 PM EDT.
Plymouth around 840 PM EDT.
Marshfield around 845 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4199 7063 4201 7067 4201 7071 4197 7065
4195 7065 4195 7063 4190 7064 4198 7107
4209 7102 4210 7065 4208 7064 4205 7066
4203 7063 4204 7066 4202 7068 4201 7065
4202 7061 4201 7060
TIME...MOT...LOC 0031Z 282DEG 41KT 4201 7099
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Loconto2 follow-up statements
627
WWUS51 KBOX 300050
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
850 PM EDT Sat Jul 29 2023
MAC005-300059-
/O.CAN.KBOX.TO.W.0007.000000T0000Z-230730T0100Z/
Bristol MA-
850 PM EDT Sat Jul 29 2023
...THE TORNADO WARNING FOR NORTHERN BRISTOL COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southeastern Massachusetts.
LAT...LON 4199 7063 4201 7067 4201 7071 4197 7065
4195 7065 4195 7063 4190 7064 4195 7092
4209 7088 4210 7065 4208 7064 4205 7066
4203 7063 4204 7066 4202 7068 4201 7065
4202 7061 4201 7060
TIME...MOT...LOC 0049Z 278DEG 41KT 4200 7070
$$
MAC023-300100-
/O.CON.KBOX.TO.W.0007.000000T0000Z-230730T0100Z/
Plymouth MA-
850 PM EDT Sat Jul 29 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM EDT FOR CENTRAL
PLYMOUTH COUNTY...
At 849 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Kingston, or 7 miles south of Marshfield, moving
east at 45 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation. Tree damage was reported in
Easton as of 832 PM.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Plymouth around 855 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4199 7063 4201 7067 4201 7071 4197 7065
4195 7065 4195 7063 4190 7064 4195 7092
4209 7088 4210 7065 4208 7064 4205 7066
4203 7063 4204 7066 4202 7068 4201 7065
4202 7061 4201 7060
TIME...MOT...LOC 0049Z 278DEG 41KT 4200 7070
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Loconto224
WWUS51 KBOX 300058
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
858 PM EDT Sat Jul 29 2023
MAC023-300108-
/O.EXP.KBOX.TO.W.0007.000000T0000Z-230730T0100Z/
Plymouth MA-
858 PM EDT Sat Jul 29 2023
...THE TORNADO WARNING FOR CENTRAL PLYMOUTH COUNTY WILL EXPIRE AT 900
PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with this thunderstorm.
LAT...LON 4199 7063 4201 7067 4201 7071 4197 7065
4195 7065 4195 7063 4190 7064 4195 7092
4209 7088 4210 7065 4208 7064 4205 7066
4203 7063 4204 7066 4202 7068 4201 7065
4202 7061 4201 7060
TIME...MOT...LOC 0058Z 282DEG 41KT 4200 7071
$$
LocontoThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 8:03 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Plymouth | 42 min |
| Jul 29, 8:07 PM EDT | Flash Flood Warning | BOX | Essex, Middlesex | 53 min |
| Jul 29, 8:21 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Plymouth | 39 min |
| Jul 29, 8:23 PM EDT | Special Marine Warning | BOX | 52 min | |
| Jul 29, 8:29 PM EDT | Special Marine Warning | BOX | 33 min | |
| Jul 29, 8:39 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Dukes, Plymouth | 66 min |
| Jul 29, 8:52 PM EDT | Special Marine Warning | BOX | 38 min | |
| Jul 29, 8:54 PM EDT | Special Marine Warning | BOX | 66 min | |
| Jul 29, 9:06 PM EDT | Special Marine Warning | BOX | 54 min | |
| Jul 29, 9:16 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable | 29 min |
| Jul 29, 9:19 PM EDT | Special Marine Warning | BOX | 56 min | |
| Jul 29, 9:44 PM EDT | Special Weather Statement | BOX | Dukes | 46 min |
| Jul 29, 9:47 PM EDT | Special Marine Warning | BOX | 58 min | |
| Jul 29, 10:09 PM EDT | Special Weather Statement | BOX | Nantucket | 66 min |
| Jul 29, 10:34 PM EDT | Special Marine Warning | BOX | 22 min | |
| Jul 30, 8:44 AM EDT | Rip Current Statement | BOX | Barnstable, Bristol, Dukes, Nantucket | 11 hr |
Nearby
Tornado Warnings in Massachusetts, 2023Every tornado warning in 2023Tornadoes in 2023
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.