Alert archive / Rhode Island / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 55, NWS Boston/Norton, MA

July 18, 20125 counties in Rhode Island; 4 counties in Massachusetts; Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 18, 2012, 3:46 PM EDT for 5 counties in Rhode Island; 4 counties in Massachusetts; Northeastern Connecticut Planning Region, Connecticut. It was in force for 59 min. 18 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 18, 2012, 3:46 PM EDT (19:46 UTC)
Expired: Jul 18, 2012, 4:45 PM EDT
In force: 59 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

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

The radar

The Boston radar (KBOX), 31 km from the middle of the area, began a volume at 19:48 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 18, 3:48 PM EDT	HAIL 2	Rehoboth, MA	HAIL RANGED FROM 1.5 TO 2.0 INCHES IN DIAMETER
Jul 18, 3:57 PM EDT	HAIL 1.75	Dighton, MA	GOLFBALL SIZE HAIL NEAR FIRE DEPT
Jul 18, 3:57 PM EDT	HAIL 1.75	Dighton, MA
Jul 18, 3:58 PM EDT	TSTM WND DMG	Dighton, MA	WIRES DOWN ON WILLIAMS STREET
Jul 18, 3:58 PM EDT	TSTM WND DMG	Seekonk, MA	WIRES DOWN ON PINE ST
Jul 18, 3:58 PM EDT	TSTM WND DMG	Seekonk, MA	WIRES DOWN ON PINE STREET
Jul 18, 3:58 PM EDT	HAIL 1	Seekonk, MA
Jul 18, 3:58 PM EDT	HAIL 1	Seekonk, MA
Jul 18, 4:00 PM EDT	TSTM WND DMG	Dighton, MA	TWO TREES DOWN ON ELM STREET
Jul 18, 4:08 PM EDT	HAIL 0.75	Taunton, MA	NWS EMPLOYEE
Jul 18, 4:10 PM EDT	HAIL 1	Taunton, MA
Jul 18, 4:15 PM EDT	TSTM WND DMG	Somerset, MA	ONE FOOT DIAMETER TREE DOWN ON REAGAN ROAD
Jul 18, 4:15 PM EDT	HAIL 0.88	Taunton, MA
Jul 18, 4:20 PM EDT	TSTM WND DMG	New Bedford, MA	TREE DOWN ON CAR ON CARROL STREET. TREE DOWN ON ROCHAMBEAU STREET. TREE DOWN ON HATCH STREET.
Jul 18, 4:37 PM EDT	TSTM WND DMG	Acushnet, MA	TREES DOWN ON MAIN STREET
Jul 18, 4:40 PM EDT	TSTM WND DMG	Rochester, MA	TREE DOWN ON ROBINSON RD
Jul 18, 4:44 PM EDT	TSTM WND DMG	Marion, MA	LARGE TREE DOWN ON DELANO ROAD AND PROSPECT STREETS
Jul 18, 4:49 PM EDT	TSTM WND DMG	Mattapoisett, MA	TREE DOWN ACROSS DRIVEWAY ON CRYSTAL SPRINGS ROAD

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 18, 12:20 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 7.8 hours before the alert went out and 96 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: 1521 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 1597 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

026 
WUUS51 KBOX 181946
SVRBOX
CTC015-MAC001-005-021-023-RIC001-003-005-007-009-182045-
/O.NEW.KBOX.SV.W.0055.120718T1946Z-120718T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
ISSUED BY NATIONAL WEATHER SERVICE NEW YORK NY
346 PM EDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...
  KENT COUNTY IN RHODE ISLAND...
  SOUTHEASTERN PROVIDENCE COUNTY IN RHODE ISLAND...
  NORTHERN WASHINGTON COUNTY IN RHODE ISLAND...
  BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  NORTHERN NEWPORT COUNTY IN RHODE ISLAND...
  WESTERN BARNSTABLE COUNTY IN SOUTHEAST MASSACHUSETTS...
  EASTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  SOUTHEASTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 445 PM EDT...

* AT 316 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE 
  HAIL...AND   DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
  ARE MOVING EAST AT 25   MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PRUDENCE ISLAND

LAT...LON 4164 7180 4164 7192 4225 7080 4195 7063
      4194 7054 4159 7064 4159 7065 4167 7064
      4172 7071 4158 7082 4163 7091 4157 7095
      4153 7139 4158 7132 4158 7133 4178 7138
      4153 7143 4150 7180
TIME...MOT...LOC 1945Z 262DEG 32KT 4217 7046

$$

JST

1 follow-up statement

961 
WWUS51 KBOX 182016
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
ISSUED BY NATIONAL WEATHER SERVICE NEW YORK NY
416 PM EDT WED JUL 18 2012

CTC015-MAC021-RIC003-009-182025-
/O.CAN.KBOX.SV.W.0055.000000T0000Z-120718T2045Z/
WINDHAM CT-NORFOLK MA-WASHINGTON RI-KENT RI-
416 PM EDT WED JUL 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR KENT...NORTHERN WASHINGTON...
EAST CENTRAL NORFOLK AND SOUTHEASTERN WINDHAM COUNTIES IS
CANCELLED...

LAT...LON 4164 7127 4170 7130 4174 7137 4188 7134
      4216 7075 4199 7070 4195 7062 4193 7054
      4160 7064 4159 7064 4168 7063 4167 7065
      4170 7068 4171 7067 4172 7071 4162 7085
      4158 7082 4163 7091 4157 7097 4154 7127
TIME...MOT...LOC 2015Z 293DEG 21KT 4181 7105

$$

MAC001-005-023-RIC001-005-007-182045-
/O.CON.KBOX.SV.W.0055.000000T0000Z-120718T2045Z/
BRISTOL RI-PLYMOUTH MA-BARNSTABLE MA-NEWPORT RI-BRISTOL MA-
PROVIDENCE RI-
416 PM EDT WED JUL 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR EXTREME SOUTHEASTERN PROVIDENCE...BRISTOL...NORTHEASTERN
NEWPORT...WEST CENTRAL BARNSTABLE...PLYMOUTH AND BRISTOL COUNTIES...

AT 407 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR DIGHTON...OR NEAR TAUNTON...MOVING SOUTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WESTPORT...HANSON...HANOVER...MIDDLEBOROUGH...LAKEVILLE...HALIFAX...
PEMBROKE...PLYMPTON...DARTMOUTH...NEW BEDFORD...ACUSHNET...
KINGSTON...CARVER...WAREHAM...ROCHESTER...PLYMOUTH...MATTAPOISETT...
MARION AND BOURNE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND DAMAGE WITH THIS STORM WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4164 7127 4170 7130 4174 7137 4188 7134
      4216 7075 4199 7070 4195 7062 4193 7054
      4160 7064 4159 7064 4168 7063 4167 7065
      4170 7068 4171 7067 4172 7071 4162 7085
      4158 7082 4163 7091 4157 7097 4154 7127
TIME...MOT...LOC 2015Z 293DEG 21KT 4181 7105

$$

JST

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 12:41 PM EDT	Heat Advisory	BOX	Kent, Providence	6 hr
Jul 18, 2:24 PM EDT	Flash Flood Warning	BOX	Kent, Providence	3 hr
Jul 18, 2:44 PM EDT	Severe Thunderstorm Warning	BOX	Providence	61 min
Jul 18, 3:09 PM EDT	Severe Thunderstorm Warning	BOX	Providence	51 min
Jul 18, 4:57 PM EDT	Severe Thunderstorm Warning	BOX	Providence	13 min
Jul 17, 8:23 PM EDT	Special Weather Statement	BOX	Essex	67 min
Jul 18, 12:37 PM EDT	Special Weather Statement	BOX	Middlesex	53 min
Jul 18, 12:54 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	66 min
Jul 18, 1:21 PM EDT	Special Marine Warning	BOX		84 min
Jul 18, 1:29 PM EDT	Flash Flood Warning	BOX	Essex, Middlesex	98 min
Jul 18, 1:43 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Suffolk	36 min
Jul 18, 1:45 PM EDT	Special Marine Warning	BOX		60 min
Jul 18, 1:50 PM EDT	Special Weather Statement	BOX	Hampden	40 min
Jul 18, 2:04 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire, Worcester	56 min
Jul 18, 2:04 PM EDT	Tornado Warning	BOX	Essex, Suffolk	12 min
Jul 18, 2:21 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex, Suffolk	39 min
Jul 18, 2:21 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	54 min
Jul 18, 2:30 PM EDT	Special Marine Warning	BOX		90 min
Jul 18, 2:39 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester	51 min
Jul 18, 4:04 PM EDT	Special Marine Warning	BOX		56 min
Jul 18, 4:25 PM EDT	Special Marine Warning	BOX		80 min
Jul 18, 4:42 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Plymouth	36 min
Jul 18, 5:08 PM EDT	Special Weather Statement	BOX	Norfolk, Suffolk	52 min
Jul 18, 5:24 PM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Suffolk	78 min
Jul 18, 5:27 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Plymouth, Suffolk	48 min
Jul 18, 5:30 PM EDT	Special Marine Warning	BOX		54 min
Jul 18, 6:08 PM EDT	Special Marine Warning	BOX		67 min
Jul 18, 6:27 PM EDT	Special Weather Statement	BOX	Essex	33 min
Jul 18, 2:29 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	61 min

Nearby

Severe Thunderstorm Warnings in Rhode Island, 2012 Severe Thunderstorm Warnings in Massachusetts, 2012 Severe Thunderstorm Warnings in Connecticut, 2012 Every severe thunderstorm warning in 2012

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.