Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 15, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 8, 2021, 5:59 PM EDT for 4 counties in Massachusetts. It was in force for 35 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
- Jun 8, 2021, 5:59 PM EDT (21:59 UTC)
- Expired
- Jun 8, 2021, 6:34 PM EDT
- In force
- 35 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bristol County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA
The radar
The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 22:02 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 |
|---|---|---|---|
| Jun 8, 6:05 PM EDT | TSTM WND DMG | Sharon, MA | TREE DOWN AT NORWOOD ST BY AVALON DRIVE |
| Jun 8, 6:10 PM EDT | TSTM WND DMG | Stoughton, MA | TREE AND WIRES DOWN ON ACCESS ROAD OFF PINE ST |
| Jun 8, 6:10 PM EDT | TSTM WND DMG | Stoughton, MA | TREE AND WIRES DOWN ON BROOK ST |
| Jun 8, 6:30 PM EDT | TSTM WND DMG | Stoughton, MA | TREES DOWN ON WIRES AT LAKEWOOD DRIVE BY BAY ROAD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Gray, ME (KGYX), launched 12:00Z, 10.0 hours before the alert went out and 190 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
- 36 J/kg
- Mixed-layer CIN
- -174 J/kg
- Mixed-layer LCL
- 1529 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
106
WUUS51 KBOX 082159
SVRBOX
MAC005-021-023-025-082300-
/O.NEW.KBOX.SV.W.0015.210608T2159Z-210608T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
559 PM EDT Tue Jun 8 2021
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
Southern Suffolk County in eastern Massachusetts...
Central Norfolk County in eastern Massachusetts...
Northwestern Plymouth County in southeastern Massachusetts...
North central Bristol County in southeastern Massachusetts...
* Until 700 PM EDT.
* At 558 PM EDT, a severe thunderstorm was located over Walpole, or
near Norwood, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated. This storm has a history of producing
tree and power line damage.
IMPACT...Expect wind damage to trees and power lines. Minor hail
damage to vehicles is possible.
* Locations impacted include...
Boston, Brockton, Quincy, Weymouth, Braintree, Randolph, Norwood,
Milton, Stoughton, Dedham, Walpole, Easton, Hingham, Canton,
Scituate, Pembroke, Sharon, Rockland, Foxborough and Abington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large 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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4227 7088 4226 7083 4210 7077 4206 7131
4218 7137 4232 7100 4231 7101 4231 7097
4228 7102 4226 7097 4230 7093 4225 7096
4227 7093 4225 7088 4230 7089 4233 7093
4232 7090 4234 7088
TIME...MOT...LOC 2158Z 252DEG 24KT 4214 7121
HAIL...1.00IN
WIND...60MPH
$$
Chai2 follow-up statements
341
WWUS51 KBOX 082226
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
626 PM EDT Tue Jun 8 2021
MAC005-025-082234-
/O.CAN.KBOX.SV.W.0015.000000T0000Z-210608T2300Z/
Suffolk MA-Bristol MA-
626 PM EDT Tue Jun 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SUFFOLK AND NORTH
CENTRAL BRISTOL COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4226 7087 4226 7083 4210 7077 4213 7110
4221 7113 4231 7101 4231 7100 4230 7099
4229 7102 4226 7097 4229 7094 4225 7096
4226 7091 4225 7088 4231 7089
TIME...MOT...LOC 2224Z 252DEG 24KT 4220 7098
$$
MAC021-023-082300-
/O.CON.KBOX.SV.W.0015.000000T0000Z-210608T2300Z/
Norfolk MA-Plymouth MA-
626 PM EDT Tue Jun 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHEASTERN NORFOLK AND NORTHWESTERN PLYMOUTH COUNTIES...
At 624 PM EDT, a severe thunderstorm was located over Braintree,
moving east at 30 mph. At 621 PM EDT, Amateur Radio reported trees
and wires down in Stoughton, MA.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Expect wind damage to trees and power lines. Minor hail
damage to vehicles is possible.
Locations impacted include...
Quincy, Weymouth, Braintree, Randolph, Milton, Stoughton, Hingham,
Canton, Scituate, Pembroke, Rockland, Abington, Hanover, Holbrook,
Norwell, Hull, Cohasset and Avon.
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.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4226 7087 4226 7083 4210 7077 4213 7110
4221 7113 4231 7101 4231 7100 4230 7099
4229 7102 4226 7097 4229 7094 4225 7096
4226 7091 4225 7088 4231 7089
TIME...MOT...LOC 2224Z 252DEG 24KT 4220 7098
HAIL...1.00IN
WIND...60MPH
$$
Chai213
WWUS51 KBOX 082234
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
634 PM EDT Tue Jun 8 2021
MAC021-023-082243-
/O.CAN.KBOX.SV.W.0015.000000T0000Z-210608T2300Z/
Norfolk MA-Plymouth MA-
634 PM EDT Tue Jun 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NORFOLK AND
NORTHWESTERN PLYMOUTH COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
LAT...LON 4226 7087 4226 7083 4210 7077 4213 7110
4221 7113 4231 7101 4231 7100 4230 7099
4229 7102 4226 7097 4229 7094 4225 7096
4226 7091 4225 7088 4231 7089
TIME...MOT...LOC 2229Z 252DEG 24KT 4222 7090
$$
ChaiThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 12:35 PM EDT | Special Weather Statement | BOX | Hampshire | 40 min |
| Jun 8, 12:54 PM EDT | Flash Flood Watch | BOX | Franklin, Hampden, Hampshire, Middlesex, Worcester | 8 hr |
| Jun 8, 1:02 PM EDT | Flash Flood Warning | BOX | Hampshire | 55 min |
| Jun 8, 1:13 PM EDT | Special Weather Statement | BOX | Hampden | 47 min |
| Jun 8, 1:34 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 41 min |
| Jun 8, 1:39 PM EDT | Flash Flood Warning | BOX | Hampden, Hampshire | 67 min |
| Jun 8, 2:40 PM EDT | Special Weather Statement | BOX | Hampshire | 50 min |
| Jun 8, 2:56 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 43 min |
| Jun 8, 3:09 PM EDT | Special Weather Statement | BOX | Worcester | 51 min |
| Jun 8, 3:12 PM EDT | Special Weather Statement | BOX | Essex | 48 min |
| Jun 8, 3:32 PM EDT | Special Marine Warning | BOX | 43 min | |
| Jun 8, 3:37 PM EDT | Special Weather Statement | BOX | Hampshire | 38 min |
| Jun 8, 3:42 PM EDT | Special Weather Statement | BOX | Essex | 48 min |
| Jun 8, 3:51 PM EDT | Special Weather Statement | BOX | Hampshire | 39 min |
| Jun 8, 3:52 PM EDT | Special Marine Warning | BOX | 53 min | |
| Jun 8, 4:02 PM EDT | Special Weather Statement | BOX | Norfolk | 43 min |
| Jun 8, 4:04 PM EDT | Special Weather Statement | BOX | Hampshire | 41 min |
| Jun 8, 4:13 PM EDT | Special Weather Statement | BOX | Essex | 47 min |
| Jun 8, 4:38 PM EDT | Special Marine Warning | BOX | 52 min | |
| Jun 8, 5:17 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Worcester | 58 min |
| Jun 8, 5:33 PM EDT | Special Marine Warning | BOX | 42 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2021Every severe thunderstorm warning in 2021
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.