Alert archive / Rhode Island / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Boston/Norton, MA

June 22, 20214 counties in Rhode Island; Bristol County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 22, 2021, 1:52 PM EDT for 4 counties in Rhode Island; Bristol County, Massachusetts. It was in force for 38 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: Jun 22, 2021, 1:52 PM EDT (17:52 UTC)
Expired: Jun 22, 2021, 2:30 PM EDT
In force: 38 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bristol County, MA, Bristol County, RI, Kent County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 37 km from the middle of the area, began a volume at 17:56 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 22, 2:15 PM EDT	TSTM WND DMG	Warwick, RI	LARGE BRANCH DOWN ON BEACH AVE NEAR WEST SHORE ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.9 hours before the alert went out and 151 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: 162 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

729 
WUUS51 KBOX 221752
SVRBOX
MAC005-RIC001-003-007-009-221830-
/O.NEW.KBOX.SV.W.0020.210622T1752Z-210622T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
152 PM EDT Tue Jun 22 2021

The National Weather Service in Boston/Norton has issued a

* Severe Thunderstorm Warning for...
  West central Bristol County in southeastern Massachusetts...
  North central Washington County in Rhode Island...
  Kent County in Rhode Island...
  Southeastern Providence County in Rhode Island...
  Northern Bristol County in Rhode Island...

* Until 230 PM EDT.

* At 151 PM EDT, a severe thunderstorm was located over West
  Greenwich, or near Coventry, moving northeast at 45 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, Warwick, Cranston, Pawtucket, East Providence,
  Coventry, Cumberland, North Providence, West Warwick, Johnston,
  Attleboro, Smithfield, Lincoln, Central Falls, Barrington, Swansea,
  Seekonk, East Greenwich, Rehoboth and Warren.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4160 7179 4195 7144 4176 7118 4171 7130
      4172 7131 4172 7134 4179 7137 4179 7138
      4173 7139 4170 7136 4167 7137 4167 7139
      4168 7139 4169 7145 4166 7144 4151 7171
TIME...MOT...LOC 1751Z 227DEG 39KT 4161 7166 

HAIL...0.75IN
WIND...60MPH
 
$$

BW

1 follow-up statement

537 
WWUS51 KBOX 221810
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
210 PM EDT Tue Jun 22 2021

MAC005-RIC001-003-007-009-221830-
/O.CON.KBOX.SV.W.0020.000000T0000Z-210622T1830Z/
Bristol MA-Washington RI-Kent RI-Providence RI-Bristol RI-
210 PM EDT Tue Jun 22 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR WEST CENTRAL BRISTOL...NORTHEASTERN WASHINGTON...CENTRAL KENT...
SOUTHEASTERN PROVIDENCE AND NORTHERN BRISTOL COUNTIES...

At 210 PM EDT, a severe thunderstorm was located over Cranston,
moving northeast at 45 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, Warwick, Cranston, Pawtucket, East Providence, Coventry,
Cumberland, North Providence, West Warwick, Johnston, Attleboro,
Smithfield, Lincoln, Central Falls, Barrington, Swansea, Seekonk,
East Greenwich, Rehoboth and Warren.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4169 7169 4195 7144 4176 7118 4171 7130
      4172 7131 4172 7134 4179 7137 4179 7138
      4173 7139 4170 7136 4167 7137 4167 7139
      4168 7139 4169 7145 4166 7144 4159 7156
TIME...MOT...LOC 1810Z 227DEG 39KT 4175 7145 

HAIL...0.75IN
WIND...60MPH
 
$$

BW

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 22, 3:38 AM EDT	Rip Current Statement	BOX	Washington	15 hr
Jun 22, 1:39 PM EDT	Special Weather Statement	BOX	Bristol	51 min
Jun 22, 1:41 PM EDT	Special Weather Statement	BOX	Bristol, Kent, Providence	49 min
Jun 21, 10:50 PM EDT	Special Weather Statement	BOX	Franklin	40 min
Jun 22, 2:00 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Plymouth, Suffolk	45 min
Jun 22, 2:14 PM EDT	Special Marine Warning	BOX		31 min
Jun 22, 2:33 PM EDT	Special Weather Statement	BOX	Plymouth	42 min
Jun 22, 2:43 PM EDT	Special Weather Statement	BOX	Plymouth	32 min
Jun 22, 3:06 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Plymouth	23 min
Jun 22, 3:07 PM EDT	Special Marine Warning	BOX		53 min
Jun 22, 3:41 PM EDT	Special Marine Warning	BOX		64 min
Jun 22, 4:42 PM EDT	Special Weather Statement	BOX	Norfolk, Suffolk	48 min

Nearby

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