Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 128, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Nov 13, 2021, 5:45 PM EST for Barnstable County, Dukes County, Plymouth County, Massachusetts. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Nov 13, 2021, 5:45 PM EST (22:45 UTC)
- Expired
- Nov 13, 2021, 6:45 PM EST
- In force
- 60 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Barnstable County, MA, Dukes County, MA, Plymouth County, MA
The radar
The Boston radar (KBOX), 66 km from the middle of the area, began a volume at 22:47 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.8 hours before the alert went out and 208 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
- 1435 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
316
WUUS51 KBOX 132245
SVRBOX
MAC001-007-023-132345-
/O.NEW.KBOX.SV.W.0128.211113T2245Z-211113T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
545 PM EST Sat Nov 13 2021
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
Dukes County in southeastern Massachusetts...
Southwestern Barnstable County in southeastern Massachusetts...
Southeastern Plymouth County in southeastern Massachusetts...
* Until 645 PM EST.
* At 545 PM EST, a severe thunderstorm was located over Aquinnah,
moving northeast at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Plymouth, Barnstable, Falmouth, Oak Bluffs, Edgartown, Tisbury,
Aquinnah, Yarmouth, Sandwich, Bourne, Mashpee, West Tisbury,
Chilmark, Gosnold and Hyannis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4130 7078 4134 7082 4151 7067 4142 7091
4154 7065 4168 7062 4168 7066 4182 7055
4176 7047 4166 7017 4165 7026 4161 7026
4164 7035 4161 7043 4162 7043 4156 7048
4153 7065 4140 7052 4135 7057
TIME...MOT...LOC 2245Z 216DEG 43KT 4134 7078
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Smith2 follow-up statements
451
WWUS51 KBOX 132316
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
616 PM EST Sat Nov 13 2021
MAC007-132326-
/O.CAN.KBOX.SV.W.0128.000000T0000Z-211113T2345Z/
Dukes MA-
616 PM EST Sat Nov 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR DUKES COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4154 7065 4168 7062 4168 7066 4182 7055
4176 7047 4166 7017 4165 7026 4161 7026
4164 7035 4161 7043 4162 7043 4156 7048
4153 7065
TIME...MOT...LOC 2316Z 270DEG 43KT 4163 7047
$$
MAC001-023-132345-
/O.CON.KBOX.SV.W.0128.000000T0000Z-211113T2345Z/
Barnstable MA-Plymouth MA-
616 PM EST Sat Nov 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EST
FOR SOUTHWESTERN BARNSTABLE AND SOUTHEASTERN PLYMOUTH COUNTIES...
At 616 PM EST, a severe thunderstorm was located over Mashpee, or
near Barnstable, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Plymouth, Barnstable, Falmouth, Yarmouth, Sandwich, Bourne, Mashpee
and Hyannis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4154 7065 4168 7062 4168 7066 4182 7055
4176 7047 4166 7017 4165 7026 4161 7026
4164 7035 4161 7043 4162 7043 4156 7048
4153 7065
TIME...MOT...LOC 2316Z 270DEG 43KT 4163 7047
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Smith796
WWUS51 KBOX 132336
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
636 PM EST Sat Nov 13 2021
MAC001-023-132346-
/O.EXP.KBOX.SV.W.0128.000000T0000Z-211113T2345Z/
Barnstable MA-Plymouth MA-
636 PM EST Sat Nov 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BARNSTABLE AND
SOUTHEASTERN PLYMOUTH COUNTIES WILL EXPIRE AT 645 PM EST...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 4154 7065 4168 7062 4168 7066 4182 7055
4176 7047 4166 7017 4165 7026 4161 7026
4164 7035 4161 7043 4162 7043 4156 7048
4153 7065
TIME...MOT...LOC 2336Z 216DEG 43KT 4181 7030
$$
SmithThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 12, 9:39 PM EST | Gale Warning | BOX | 29 hr | |
| Nov 13, 4:09 PM EST | Severe Thunderstorm Warning | BOX | Hampden | 15 min |
| Nov 13, 4:45 PM EST | Special Marine Warning | BOX | 60 min | |
| Nov 13, 5:01 PM EST | Severe Thunderstorm Warning | BOX | Worcester | 26 min |
| Nov 13, 5:08 PM EST | Tornado Warning | BOX | Bristol | 24 min |
| Nov 13, 5:12 PM EST | Severe Thunderstorm Warning | BOX | Bristol, Plymouth | 44 min |
| Nov 13, 5:17 PM EST | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Worcester | 7 min |
| Nov 13, 5:21 PM EST | Tornado Warning | BOX | Bristol, Norfolk | 24 min |
| Nov 13, 5:22 PM EST | Special Marine Warning | BOX | 53 min | |
| Nov 13, 5:26 PM EST | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 32 min |
| Nov 13, 5:45 PM EST | Special Weather Statement | BOX | Bristol, Plymouth | 45 min |
| Nov 13, 5:47 PM EST | Tornado Warning | BOX | Dukes | 28 min |
| Nov 13, 5:55 PM EST | Severe Thunderstorm Warning | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk | 25 min |
| Nov 13, 6:02 PM EST | Special Marine Warning | BOX | 58 min | |
| Nov 13, 6:07 PM EST | Tornado Warning | BOX | Barnstable, Dukes | 23 min |
| Nov 13, 6:13 PM EST | Special Marine Warning | BOX | 92 min | |
| Nov 13, 6:27 PM EST | Tornado Warning | BOX | Barnstable | 15 min |
| Nov 13, 6:49 PM EST | Special Weather Statement | BOX | Barnstable | 41 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.