Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 126, NWS Boston/Norton, MA

November 13, 20215 counties in Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this severe thunderstorm warning at Nov 13, 2021, 5:17 PM EST for 5 counties in Massachusetts; Providence County, Rhode Island. It was in force for 7 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, 5:17 PM EST (22:17 UTC)
Expired: Nov 13, 2021, 5:24 PM EST
In force: 7 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, Worcester County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 21 km from the middle of the area, began a volume at 22:18 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
Nov 13, 5:25 PM EST	TSTM WND DMG	Mendon, MA	TREE AND POWER LINES DOWN ON NORTHBRIDGE ST

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, 10.3 hours before the alert went out and 179 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.

082 
WUUS51 KBOX 132217
SVRBOX
MAC005-017-021-023-027-RIC007-132245-
/O.NEW.KBOX.SV.W.0126.211113T2217Z-211113T2245Z/

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

The National Weather Service in Boston/Norton has issued a

* Severe Thunderstorm Warning for...
  Norfolk County in eastern Massachusetts...
  Southeastern Worcester County in central Massachusetts...
  South central Middlesex County in northeastern Massachusetts...
  Northwestern Plymouth County in southeastern Massachusetts...
  Northwestern Bristol County in southeastern Massachusetts...
  Eastern Providence County in Rhode Island...

* Until 545 PM EST.

* At 517 PM EST, severe thunderstorms were located along a line
  extending from Sutton to North Smithfield to near Providence,
  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...
  Providence, Brockton, Cranston, Pawtucket, Framingham, Taunton,
  East Providence, Woonsocket, Marlborough, Shrewsbury, Cumberland,
  Natick, North Providence, Franklin, Needham, Johnston, North
  Attleborough, Norwood, Milford and Wellesley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4220 7113 4200 7101 4184 7137 4186 7138
      4183 7138 4178 7149 4197 7163 4218 7186
      4241 7135
TIME...MOT...LOC 2217Z 246DEG 43KT 4215 7174 4199 7157 4181 7147 

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

$$

Smith

1 follow-up statement

007 
WWUS51 KBOX 132224
SVSBOX

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

MAC005-017-021-023-027-RIC007-132234-
/O.CAN.KBOX.SV.W.0126.000000T0000Z-211113T2245Z/
Norfolk MA-Worcester MA-Middlesex MA-Plymouth MA-Bristol MA-
Providence RI-
524 PM EST Sat Nov 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORFOLK...SOUTHEASTERN
WORCESTER...SOUTH CENTRAL MIDDLESEX...NORTHWESTERN PLYMOUTH...
NORTHWESTERN BRISTOL AND EASTERN PROVIDENCE COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of 
the area. Therefore, the warning has been cancelled.
However gusty winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 700 PM EST for
Rhode Island.

LAT...LON 4220 7113 4200 7101 4184 7137 4186 7138
      4183 7138 4178 7149 4197 7163 4218 7186
      4241 7135
TIME...MOT...LOC 2222Z 246DEG 43KT 4218 7166 4202 7149 4184 7139 

$$

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, 5:21 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, 5:45 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.