Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 127, NWS Boston/Norton, MA

November 13, 20216 counties in Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this severe thunderstorm warning at Nov 13, 2021, 5:26 PM EST for 6 counties in Massachusetts; Providence County, Rhode Island. It was in force for 32 min. 1 report 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: Nov 13, 2021, 5:26 PM EST (22:26 UTC)
Expired: Nov 13, 2021, 5:58 PM EST
In force: 32 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Bristol County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 16 km from the middle of the area, began a volume at 22:30 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
Nov 13, 5:45 PM EST	TSTM WND DMG	Raynham, MA	TREE ADN WIRES DOWN ON THAYER STREET

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
Nov 13, 12:27 PM EST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.4 hours before the alert went out and 184 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted.

838 
WUUS51 KBOX 132226
SVRBOX
MAC005-017-021-023-025-027-RIC007-132330-
/O.NEW.KBOX.SV.W.0127.211113T2226Z-211113T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
526 PM EST Sat Nov 13 2021

The National Weather Service in Boston/Norton has issued a

* Severe Thunderstorm Warning for...
  Southwestern Suffolk County in eastern Massachusetts...
  Norfolk County in eastern Massachusetts...
  Southeastern Worcester County in central Massachusetts...
  Southeastern Middlesex County in northeastern Massachusetts...
  West central Plymouth County in southeastern Massachusetts...
  Northwestern Bristol County in southeastern Massachusetts...
  Northeastern Providence County in Rhode Island...

* Until 630 PM EST.

* At 526 PM EST, severe thunderstorms were located along a line
  extending from Westborough to Seekonk, moving northeast at 50 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, Providence, Cambridge, Brockton, Quincy, Newton, Pawtucket,
  Framingham, Waltham, Brookline, Taunton, Weymouth, East Providence,
  Arlington, Woonsocket, Braintree, Cumberland, Natick, Randolph and
  North Providence.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4243 7116 4198 7083 4180 7139 4182 7139
      4180 7140 4179 7142 4224 7165
TIME...MOT...LOC 2226Z 244DEG 63KT 4227 7161 4183 7133 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Smith

3 follow-up statements

420 
WWUS51 KBOX 132234
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
534 PM EST Sat Nov 13 2021

RIC007-132244-
/O.CAN.KBOX.SV.W.0127.000000T0000Z-211113T2330Z/
Providence RI-
534 PM EST Sat Nov 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PROVIDENCE COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the area. 
Therefore, the warning has been cancelled.

LAT...LON 4243 7116 4198 7083 4184 7127 4187 7129
      4193 7130 4198 7135 4227 7157
TIME...MOT...LOC 2234Z 244DEG 63KT 4233 7145 4189 7117 

$$

MAC005-017-021-023-025-027-132330-
/O.CON.KBOX.SV.W.0127.000000T0000Z-211113T2330Z/
Suffolk MA-Norfolk MA-Worcester MA-Middlesex MA-Plymouth MA-
Bristol MA-
534 PM EST Sat Nov 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EST
FOR SOUTHWESTERN SUFFOLK...NORFOLK...EAST CENTRAL WORCESTER...
SOUTHEASTERN MIDDLESEX...WEST CENTRAL PLYMOUTH AND NORTHWESTERN
BRISTOL COUNTIES...

At 534 PM EST, severe thunderstorms were located along a line 
extending from Framingham to near Dighton, moving northeast at 50 
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, Brockton, Quincy, Newton, Framingham, Waltham,
Brookline, Taunton, Weymouth, Arlington, Braintree, Natick, Randolph,
Watertown, Franklin, Needham, North Attleborough, Norwood and
Milford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4243 7116 4198 7083 4184 7127 4187 7129
      4193 7130 4198 7135 4227 7157
TIME...MOT...LOC 2234Z 244DEG 63KT 4233 7145 4189 7117 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Smith

973 
WWUS51 KBOX 132249
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
549 PM EST Sat Nov 13 2021

MAC027-132259-
/O.CAN.KBOX.SV.W.0127.000000T0000Z-211113T2330Z/
Worcester MA-
549 PM EST Sat Nov 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WORCESTER COUNTY
IS CANCELLED...

The storms which prompted the warning have  moved out of 
the area. Therefore, the warning has been cancelled.

LAT...LON 4243 7116 4198 7083 4193 7107 4202 7106
      4206 7113 4211 7115 4234 7137
TIME...MOT...LOC 2249Z 244DEG 63KT 4244 7113 4200 7086 

$$

MAC005-017-021-023-025-132330-
/O.CON.KBOX.SV.W.0127.000000T0000Z-211113T2330Z/
Suffolk MA-Norfolk MA-Middlesex MA-Plymouth MA-Bristol MA-
549 PM EST Sat Nov 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EST
FOR SOUTHWESTERN SUFFOLK...CENTRAL NORFOLK...SOUTHEASTERN
MIDDLESEX...WEST CENTRAL PLYMOUTH AND NORTH CENTRAL BRISTOL
COUNTIES...

At 549 PM EST, severe thunderstorms were located along a line
extending from Winchester to Halifax, moving northeast at 60 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, Brockton, Quincy, Newton, Waltham, Brookline,
Weymouth, Arlington, Braintree, Natick, Randolph, Watertown, Needham,
Norwood, Wellesley, Milton, Stoughton, Bridgewater and Belmont.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4243 7116 4198 7083 4193 7107 4202 7106
      4206 7113 4211 7115 4234 7137
TIME...MOT...LOC 2249Z 244DEG 63KT 4244 7113 4200 7086 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Smith

186 
WWUS51 KBOX 132258
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
558 PM EST Sat Nov 13 2021

MAC005-017-021-023-025-132307-
/O.CAN.KBOX.SV.W.0127.000000T0000Z-211113T2330Z/
Suffolk MA-Norfolk MA-Middlesex MA-Plymouth MA-Bristol MA-
558 PM EST Sat Nov 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SUFFOLK...CENTRAL
NORFOLK...SOUTHEASTERN MIDDLESEX...WEST CENTRAL PLYMOUTH AND NORTH
CENTRAL BRISTOL COUNTIES IS CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.

LAT...LON 4243 7116 4198 7083 4193 7107 4202 7106
      4206 7113 4211 7115 4234 7137
TIME...MOT...LOC 2256Z 244DEG 63KT 4250 7098 4206 7071 

$$

Smith

The 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, 5:45 PM EST	Special Weather Statement	BOX	Bristol, Plymouth	45 min
Nov 13, 5:45 PM EST	Severe Thunderstorm Warning	BOX	Barnstable, Dukes, Plymouth	60 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
Nov 13, 5:02 PM EST	Tornado Warning	BOX	Providence	28 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2021 Severe Thunderstorm Warnings in Rhode Island, 2021 Every 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.