Alert archive / Rhode Island / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 60, NWS Boston/Norton, MA

July 7, 20215 counties in Rhode Island; 4 counties in Massachusetts; Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 7, 2021, 6:17 PM EDT for 5 counties in Rhode Island; 4 counties in Massachusetts; Northeastern Connecticut Planning Region, Connecticut. It was in force for 58 min. 4 reports 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: Jul 7, 2021, 6:17 PM EDT (22:17 UTC)
Expired: Jul 7, 2021, 7:15 PM EDT
In force: 58 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Northeastern Connecticut Planning Region, CT, Bristol County, MA, Middlesex County, MA, Norfolk County, MA, Worcester County, MA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 39 km from the middle of the area, began a volume at 22:20 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
Jul 7, 6:29 PM EDT	TSTM WND GST 60	Webster, MA
Jul 7, 7:00 PM EDT	TSTM WND DMG	Hopkinton, MA	TREES AND WIRES DOWN ON NORTH MILL STREET, ALSO TREE DOWN ON TRACTOR TRAILER ON LUMBER STREET
Jul 7, 7:17 PM EDT	TSTM WND DMG	Dover, MA	MULTIPLE TREES DOWN ON FARM STREET
Jul 7, 7:17 PM EDT	TSTM WND DMG	Dover, MA	TREE DOWN ON WIRES ON STRAWBERRY HILL 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
Jul 7, 2:41 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.3 hours before the alert went out and 149 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: 568 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

197 
WUUS51 KBOX 072217
SVRBOX
CTC015-MAC005-017-021-027-RIC001-003-005-007-009-072315-
/O.NEW.KBOX.SV.W.0060.210707T2217Z-210707T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
617 PM EDT Wed Jul 7 2021

The National Weather Service in Boston/Norton has issued a

* Severe Thunderstorm Warning for...
  Windham County in northern Connecticut...
  Western Norfolk County in eastern Massachusetts...
  Southeastern Worcester County in central Massachusetts...
  Southeastern Middlesex County in northeastern Massachusetts...
  Northwestern Bristol County in southeastern Massachusetts...
  Northeastern Washington County in Rhode Island...
  Northwestern Newport County in Rhode Island...
  Kent County in Rhode Island...
  Providence County in Rhode Island...
  Western Bristol County in Rhode Island...

* Until 715 PM EDT.

* At 616 PM EDT, severe thunderstorms were located along a line
  extending from Auburn to near Pomfret to Preston, moving east at 40
  mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Locations impacted include...
  Worcester, Providence, Newton, Warwick, Cranston, Pawtucket,
  Framingham, East Providence, Woonsocket, Shrewsbury, Coventry,
  Cumberland, Natick, North Providence, Franklin, West Warwick,
  Needham, Johnston, North Attleborough and Norwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4155 7179 4164 7179 4165 7207 4223 7193
      4233 7119 4187 7121 4167 7130 4167 7131
      4179 7138 4178 7139 4165 7136 4169 7145
      4163 7140 4163 7131 4159 7133 4162 7133
      4162 7141 4155 7136 4159 7141 4154 7146
TIME...MOT...LOC 2216Z 267DEG 34KT 4222 7184 4185 7192 4154 7202 

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

Chai

2 follow-up statements

315 
WWUS51 KBOX 072255
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
655 PM EDT Wed Jul 7 2021

CTC015-072304-
/O.CAN.KBOX.SV.W.0060.000000T0000Z-210707T2315Z/
Windham CT-
655 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR WINDHAM COUNTY IS CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
eastern, central, southeastern and northeastern Massachusetts...and
Rhode Island.

LAT...LON 4155 7179 4174 7176 4193 7171 4227 7162
      4233 7119 4187 7121 4167 7130 4167 7131
      4179 7138 4178 7139 4165 7136 4169 7145
      4163 7140 4163 7131 4159 7133 4162 7133
      4162 7141 4155 7136 4159 7141 4154 7146
TIME...MOT...LOC 2254Z 267DEG 34KT 4224 7136 4187 7144 4156 7155 

$$

MAC005-017-021-027-RIC001-003-005-007-009-072315-
/O.CON.KBOX.SV.W.0060.000000T0000Z-210707T2315Z/
Norfolk MA-Worcester MA-Middlesex MA-Bristol MA-Washington RI-
Newport RI-Kent RI-Providence RI-Bristol RI-
655 PM EDT Wed Jul 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR WESTERN NORFOLK...SOUTHEASTERN WORCESTER...SOUTHEASTERN
MIDDLESEX...NORTHWESTERN BRISTOL...NORTHEASTERN WASHINGTON...
NORTHWESTERN NEWPORT...KENT...PROVIDENCE AND WESTERN BRISTOL
COUNTIES...

At 654 PM EDT, severe thunderstorms were located along a line
extending from Sherborn to North Providence to near Exeter, moving
east at 40 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, Newton, Warwick, Cranston, Pawtucket, Framingham, East
Providence, Woonsocket, Coventry, Cumberland, Natick, North
Providence, Franklin, West Warwick, 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 4155 7179 4174 7176 4193 7171 4227 7162
      4233 7119 4187 7121 4167 7130 4167 7131
      4179 7138 4178 7139 4165 7136 4169 7145
      4163 7140 4163 7131 4159 7133 4162 7133
      4162 7141 4155 7136 4159 7141 4154 7146
TIME...MOT...LOC 2254Z 267DEG 34KT 4224 7136 4187 7144 4156 7155 

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

Chai

400 
WWUS51 KBOX 072308
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
708 PM EDT Wed Jul 7 2021

MAC005-017-021-027-RIC001-003-005-007-009-072318-
/O.EXP.KBOX.SV.W.0060.000000T0000Z-210707T2315Z/
Norfolk MA-Worcester MA-Middlesex MA-Bristol MA-Washington RI-
Newport RI-Kent RI-Providence RI-Bristol RI-
708 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN NORFOLK...SOUTHEASTERN
WORCESTER...SOUTHEASTERN MIDDLESEX...NORTHWESTERN BRISTOL...
NORTHEASTERN WASHINGTON...NORTHWESTERN NEWPORT...KENT...PROVIDENCE
AND WESTERN BRISTOL COUNTIES WILL EXPIRE AT 715 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
eastern, central, southeastern and northeastern Massachusetts...and
Rhode Island.

LAT...LON 4155 7179 4174 7176 4193 7171 4227 7162
      4233 7119 4187 7121 4167 7130 4167 7131
      4179 7138 4178 7139 4165 7136 4169 7145
      4163 7140 4163 7131 4159 7133 4162 7133
      4162 7141 4155 7136 4159 7141 4154 7146
TIME...MOT...LOC 2308Z 267DEG 34KT 4225 7121 4188 7129 4157 7141 

$$

Chai

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 5:10 PM EDT	Tropical Storm Watch	BOX	Bristol, Newport, Washington	13 hr
Jul 7, 7:45 PM EDT	Special Weather Statement	BOX	Washington	45 min
Jul 7, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	60 min
Jul 7, 4:01 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	59 min
Jul 7, 4:05 PM EDT	Special Weather Statement	BOX	Essex	40 min
Jul 7, 4:33 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	57 min
Jul 7, 5:02 PM EDT	Special Weather Statement	BOX	Worcester	43 min
Jul 7, 5:05 PM EDT	Special Marine Warning	BOX		25 min
Jul 7, 5:21 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire, Worcester	54 min
Jul 7, 5:24 PM EDT	Special Marine Warning	BOX		66 min
Jul 7, 5:30 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Worcester	60 min
Jul 7, 6:01 PM EDT	Special Weather Statement	BOX	Worcester	44 min
Jul 7, 6:18 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	36 min
Jul 7, 6:22 PM EDT	Special Marine Warning	BOX		53 min
Jul 7, 6:59 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Middlesex, Norfolk, Plymouth, Suffolk	61 min
Jul 7, 7:18 PM EDT	Special Marine Warning	BOX		57 min
Jul 7, 7:47 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth	25 min
Jul 7, 7:51 PM EDT	Special Marine Warning	BOX		54 min
Jul 7, 4:50 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	55 min
Jul 7, 5:53 PM EDT	Special Weather Statement	BOX		52 min
Jul 7, 6:38 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	43 min

Nearby

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