Alert archive / Massachusetts / Tornado Warnings in 2023
Tornado Warning 9, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this tornado warning at Aug 8, 2023, 11:18 AM EDT for Barnstable County, Bristol County, Plymouth County, Massachusetts. It was in force for 27 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
- Aug 8, 2023, 11:18 AM EDT (15:18 UTC)
- Expired
- Aug 8, 2023, 11:45 AM EDT
- In force
- 27 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Barnstable County, MA, Bristol County, MA, Plymouth County, MA
The radar
The Boston radar (KBOX), 38 km from the middle of the area, began a volume at 15:18 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 |
|---|---|---|---|
| Aug 8, 11:20 AM EDT | TSTM WND DMG | 2 Nw Mattapoisett, MA | trees and wires down on North Street around Eldorado Dr. relayed by amateur radio. |
| Aug 8, 11:20 AM EDT | TSTM WND DMG | 2 Wnw Mattapoisett, MA | trees down on Acushent Rd. Relayed by amateur radio. |
| Aug 8, 11:20 AM EDT | TSTM WND DMG | 2 Wnw Mattapoisett, MA | Trees and wires down on Hereford Hill Rd. Relayed by amateur radio. |
| Aug 8, 11:20 AM EDT | TORNADO | 2 Wnw Mattapoisett, MA | Corrects previous tornado report from 2 WNW Mattapoisett. 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 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 3.3 hours before the alert went out and 199 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
- 331 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.2
The text
As transmitted.
461
WFUS51 KBOX 081518
TORBOX
MAC001-005-023-081545-
/O.NEW.KBOX.TO.W.0009.230808T1518Z-230808T1545Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
1118 AM EDT Tue Aug 8 2023
The National Weather Service in Boston/Norton has issued a
* Tornado Warning for...
Western Barnstable County in southeastern Massachusetts...
Southeastern Plymouth County in southeastern Massachusetts...
East central Bristol County in southeastern Massachusetts...
* Until 1145 AM EDT.
* At 1118 AM EDT, a severe thunderstorm capable of producing a
tornado was located over Mattapoisett, or near Marion, moving
northeast at 20 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...
Marion, Middleborough, Wareham, Acushnet, Mattapoisett, and
Rochester around 1125 AM 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 4164 7086 4168 7093 4196 7078 4179 7050
TIME...MOT...LOC 1518Z 218DEG 18KT 4168 7085
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
BL1 follow-up statement
943
WWUS51 KBOX 081530
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
1130 AM EDT Tue Aug 8 2023
MAC005-081540-
/O.CAN.KBOX.TO.W.0009.000000T0000Z-230808T1545Z/
Bristol MA-
1130 AM EDT Tue Aug 8 2023
...THE TORNADO WARNING FOR EAST CENTRAL BRISTOL COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
LAT...LON 4167 7079 4167 7083 4171 7087 4193 7074
4179 7050
TIME...MOT...LOC 1530Z 236DEG 15KT 4171 7079
$$
MAC001-023-081545-
/O.CON.KBOX.TO.W.0009.000000T0000Z-230808T1545Z/
Barnstable MA-Plymouth MA-
1130 AM EDT Tue Aug 8 2023
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT FOR WESTERN
BARNSTABLE AND SOUTHEASTERN PLYMOUTH COUNTIES...
At 1130 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Marion, moving northeast at 20 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...
Plymouth, Marion, Middleborough, Wareham, Bourne, Carver, and
Rochester around 1135 AM 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 4167 7079 4167 7083 4171 7087 4193 7074
4179 7050
TIME...MOT...LOC 1530Z 236DEG 15KT 4171 7079
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
BLThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 3:10 AM EDT | Flood Watch | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more | 15 hr |
| Aug 8, 6:37 AM EDT | Special Weather Statement | BOX | Essex | 23 min |
| Aug 8, 6:58 AM EDT | Special Weather Statement | BOX | Middlesex | 47 min |
| Aug 8, 7:37 AM EDT | Special Weather Statement | BOX | Essex | 38 min |
| Aug 8, 8:09 AM EDT | Special Weather Statement | BOX | Middlesex | 66 min |
| Aug 8, 8:25 AM EDT | Special Marine Warning | BOX | 65 min | |
| Aug 8, 8:58 AM EDT | Tornado Warning | BOX | Middlesex, Worcester | 32 min |
| Aug 8, 9:16 AM EDT | Areal Flood Warning | BOX | Essex, Middlesex, Norfolk, Worcester | 4 hr |
| Aug 8, 9:17 AM EDT | Severe Thunderstorm Warning | BOX | Bristol, Plymouth | 58 min |
| Aug 8, 9:19 AM EDT | Special Marine Warning | BOX | 56 min | |
| Aug 8, 9:28 AM EDT | Special Marine Warning | BOX | 62 min | |
| Aug 8, 9:29 AM EDT | Special Weather Statement | BOX | Essex | 61 min |
| Aug 8, 10:01 AM EDT | Special Weather Statement | BOX | Essex, Middlesex, Norfolk, Suffolk | 44 min |
| Aug 8, 10:07 AM EDT | Severe Thunderstorm Warning | BOX | Bristol, Plymouth | 53 min |
| Aug 8, 10:12 AM EDT | Special Marine Warning | BOX | 63 min | |
| Aug 8, 10:21 AM EDT | Severe Thunderstorm Warning | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk | 54 min |
| Aug 8, 10:28 AM EDT | Special Marine Warning | BOX | 62 min | |
| Aug 8, 10:47 AM EDT | Flash Flood Warning | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk and 1 more | 3 hr |
| Aug 8, 10:48 AM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Dukes, Plymouth | 57 min |
| Aug 8, 11:11 AM EDT | Special Marine Warning | BOX | 64 min | |
| Aug 8, 11:12 AM EDT | Special Weather Statement | BOX | Essex | 63 min |
| Aug 8, 11:13 AM EDT | Special Marine Warning | BOX | 62 min | |
| Aug 8, 11:37 AM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Dukes, Plymouth | 53 min |
| Aug 8, 11:52 AM EDT | Special Marine Warning | BOX | 53 min | |
| Aug 8, 11:53 AM EDT | Tornado Warning | BOX | Barnstable | 37 min |
| Aug 8, 12:06 PM EDT | River Flood Warning | BOX | Essex | 6 hr |
| Aug 8, 12:19 PM EDT | Severe Thunderstorm Warning | BOX | Barnstable | 41 min |
| Aug 8, 12:39 PM EDT | Special Marine Warning | BOX | 66 min | |
| Aug 8, 1:37 PM EDT | Special Marine Warning | BOX | 53 min | |
| Aug 8, 2:27 PM EDT | Special Weather Statement | BOX | Middlesex | 33 min |
| Aug 8, 3:25 PM EDT | Special Weather Statement | BOX | Essex | 65 min |
| Aug 8, 3:38 PM EDT | Special Marine Warning | BOX | 67 min |
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.