Alert archive / Rhode Island / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 41, NWS Boston/Norton, MA

July 1, 20124 counties in Rhode Island; Bristol County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 1, 2012, 4:34 PM EDT for 4 counties in Rhode Island; Bristol County, Massachusetts. It was in force for 41 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
Jul 1, 2012, 4:34 PM EDT (20:34 UTC)
Expired
Jul 1, 2012, 5:15 PM EDT
In force
41 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

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

The radar

The Boston radar (KBOX), 28 km from the middle of the area, began a volume at 20:36 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.

IssuedProductOfficeLasted
Jul 1, 1:35 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.6 hours before the alert went out and 109 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2012-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 121 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2012-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
121 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1755 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
68 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.

873 
WUUS51 KBOX 012034
SVRBOX
MAC005-RIC001-003-005-007-012115-
/O.NEW.KBOX.SV.W.0041.120701T2034Z-120701T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
434 PM EDT SUN JUL 1 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BRISTOL COUNTY IN  RHODE ISLAND...
  SOUTHWESTERN BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  NORTHEASTERN KENT COUNTY IN  RHODE ISLAND... 
  NORTHEASTERN NEWPORT COUNTY IN  RHODE ISLAND... 
  SOUTHEASTERN PROVIDENCE COUNTY IN  RHODE ISLAND...

* UNTIL 515 PM EDT

* AT 431 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NORTH PROVIDENCE TO WEST WARWICK...MOVING EAST AT 
  30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PROVIDENCE...FALL RIVER...BARRINGTON...CRANSTON...PAWTUCKET...
  SEEKONK...EAST PROVIDENCE...JOHNSTON...NORTH PROVIDENCE...
  WARREN...DIGHTON...SOMERSET...SWANSEA AND REHOBOTH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

&&

LAT...LON 4167 7120 4171 7116 4171 7121 4173 7122
      4170 7124 4172 7126 4168 7124 4169 7129
      4172 7129 4171 7130 4175 7136 4179 7137
      4173 7139 4172 7136 4170 7137 4172 7154
      4189 7149 4184 7107 4166 7111
TIME...MOT...LOC 2031Z 278DEG 27KT 4185 7150 4171 7154 

$$

VALLIER-TALBOT
1 follow-up statement
707 
WWUS51 KBOX 012106
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
506 PM EDT SUN JUL 1 2012

MAC005-RIC001-005-003-007-012115-
/O.EXP.KBOX.SV.W.0041.000000T0000Z-120701T2115Z/
BRISTOL MA-KENT RI-BRISTOL RI-NEWPORT RI-PROVIDENCE RI-
506 PM EDT SUN JUL 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN BRISTOL...
NORTHEASTERN KENT...BRISTOL...NORTHEASTERN NEWPORT AND SOUTHEASTERN 
PROVIDENCE COUNTIES WILL EXPIRE AT 515 PM EDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR
PROPERTY. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THESE THUNDERSTORMS.

LAT...LON 4167 7120 4171 7116 4171 7121 4173 7122
      4170 7124 4172 7126 4168 7124 4169 7129
      4172 7129 4171 7130 4175 7136 4179 7137
      4173 7139 4172 7136 4170 7137 4172 7154
      4189 7149 4184 7107 4166 7111
TIME...MOT...LOC 2105Z 278DEG 27KT 4185 7150 4171 7154 

$$

EVT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 3:04 PM EDTSevere Thunderstorm WarningBOXProvidence41 min
Jul 1, 3:38 PM EDTSevere Thunderstorm WarningBOXKent, Providence, Washington52 min
Jul 1, 3:44 PM EDTSevere Thunderstorm WarningBOXBristol, Kent, Newport, Providence46 min
Jul 1, 4:10 PM EDTSevere Thunderstorm WarningBOXWashington35 min
Jul 1, 4:27 PM EDTSevere Thunderstorm WarningBOXKent, Washington24 min
Jul 1, 6:24 PM EDTSpecial Weather StatementBOXWashington36 min
Jul 1, 6:35 PM EDTSevere Thunderstorm WarningBOXWashington25 min
Jul 1, 3:06 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire39 min
Jul 1, 3:40 PM EDTSevere Thunderstorm WarningBOXBarnstable, Plymouth50 min
Jul 1, 3:42 PM EDTSpecial Marine WarningBOX48 min
Jul 1, 3:48 PM EDTSpecial Marine WarningBOX27 min
Jul 1, 4:56 PM EDTSpecial Marine WarningBOX34 min
Jul 1, 5:02 PM EDTSpecial Marine WarningBOX43 min
Jul 1, 5:33 PM EDTSpecial Marine WarningBOX27 min
Jul 1, 5:43 PM EDTSpecial Weather StatementBOXDukes47 min
Jul 1, 5:52 PM EDTSpecial Marine WarningBOX38 min
Jul 1, 6:11 PM EDTSpecial Marine WarningBOX49 min
Jul 1, 6:56 PM EDTSpecial Marine WarningBOX49 min
Jul 1, 7:03 PM EDTSpecial Marine WarningBOX57 min

Nearby

Severe Thunderstorm Warnings in Rhode Island, 2012Severe Thunderstorm Warnings in Massachusetts, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.