Alert archive / Massachusetts / Tornado Warnings in 2021

Tornado Warning 19, NWS Boston/Norton, MA

November 13, 2021Bristol County, Norfolk County, Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this tornado warning at Nov 13, 2021, 5:21 PM EST for Bristol County, Norfolk County, Massachusetts; Providence County, Rhode Island. It was in force for 24 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, 5:21 PM EST (22:21 UTC)
Expired: Nov 13, 2021, 5:45 PM EST
In force: 24 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bristol County, MA, Norfolk County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 22 km from the middle of the area, began a volume at 22:24 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 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 167 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.

102 
WFUS51 KBOX 132221
TORBOX
MAC005-021-RIC007-132245-
/O.NEW.KBOX.TO.W.0019.211113T2221Z-211113T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
521 PM EST Sat Nov 13 2021

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  South central Norfolk County in eastern Massachusetts...
  Northwestern Bristol County in southeastern Massachusetts...
  East central Providence County in Rhode Island...

* Until 545 PM EST.
    
* At 521 PM EST, a severe thunderstorm capable of producing a tornado
  was located over Pawtucket, moving northeast at 40 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...
  Cumberland, North Attleborough, Seekonk and Plainville around 530 
  PM EST.
  Attleboro and Rehoboth around 535 PM EST.
  Dighton around 540 PM EST.
  Mansfield, Norton and Foxborough around 545 PM EST.

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.

&&

LAT...LON 4185 7149 4207 7127 4189 7109 4180 7138
      4182 7139 4180 7140 4179 7143
TIME...MOT...LOC 2221Z 231DEG 36KT 4185 7139 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Chai

1 follow-up statement

763 
WWUS51 KBOX 132236
SVSBOX

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

MAC005-021-RIC007-132246-
/O.EXP.KBOX.TO.W.0019.000000T0000Z-211113T2245Z/
Norfolk MA-Bristol MA-Providence RI-
536 PM EST Sat Nov 13 2021

...THE TORNADO WARNING FOR SOUTH CENTRAL NORFOLK...NORTHWESTERN
BRISTOL AND EAST CENTRAL PROVIDENCE COUNTIES WILL EXPIRE AT 545 PM
EST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with this thunderstorm.

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

LAT...LON 4185 7149 4207 7127 4189 7109 4180 7138
      4182 7139 4180 7140 4179 7143
TIME...MOT...LOC 2236Z 231DEG 36KT 4194 7124 

$$

Chai

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, 5:22 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

Tornado Warnings in Massachusetts, 2021 Tornado Warnings in Rhode Island, 2021 Every tornado warning in 2021 Tornadoes 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.