Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 101, NWS Boston/Norton, MA

August 10, 2011Bristol County, Norfolk County, Worcester County, Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 10, 2011, 7:04 PM EDT for Bristol County, Norfolk County, Worcester County, Massachusetts; Providence County, Rhode Island. It was in force for 41 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
Aug 10, 2011, 7:04 PM EDT (23:04 UTC)
Expired
Aug 10, 2011, 7:45 PM EDT
In force
41 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

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

The radar

The Boston radar (KBOX), 16 km from the middle of the area, began a volume at 23:03 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

TimeReportWhereRemark
Aug 10, 7:17 PM EDTTSTM WND DMGCumberland, RITREES AND WIRES DOWN ON WRENTHAM ROAD

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

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 11.1 hours before the alert went out and 118 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 2011-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 613 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 2011-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.1939587897Sfc1 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
613 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
724 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

274 
WUUS51 KBOX 102304
SVRBOX
MAC005-021-027-RIC007-102345-
/O.NEW.KBOX.SV.W.0101.110810T2304Z-110810T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
704 PM EDT WED AUG 10 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN PROVIDENCE COUNTY IN RHODE ISLAND...
  THIS INCLUDES THE CITY OF WOONSOCKET...
  SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  SOUTHWESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF FRANKLIN...
  NORTHWESTERN BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...NORTH ATTLEBOROUGH...ATTLEBOROUGH...

* UNTIL 745 PM EDT

* AT 659 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  WOONSOCKET...AND WAS MOVING EAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...CUMBERLAND...WRENTHAM...
  PLAINVILLE...FOXBOROUGH...MANSFIELD AND NORTON.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.

&&

LAT...LON 4208 7114 4183 7111 4196 7160 4210 7158
TIME...MOT...LOC 2304Z 279DEG 24KT 4200 7150

$$

DOODY
1 follow-up statement
080 
WWUS51 KBOX 102319
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
719 PM EDT WED AUG 10 2011

MAC027-102329-
/O.CAN.KBOX.SV.W.0101.000000T0000Z-110810T2345Z/
WORCESTER MA-
719 PM EDT WED AUG 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WORCESTER COUNTY
IS CANCELLED...

LAT...LON 4208 7145 4208 7114 4183 7111 4192 7147
TIME...MOT...LOC 2319Z 279DEG 24KT 4198 7137

$$

MAC005-021-RIC007-102345-
/O.CON.KBOX.SV.W.0101.000000T0000Z-110810T2345Z/
NORFOLK MA-PROVIDENCE RI-BRISTOL MA-
719 PM EDT WED AUG 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM EDT
FOR SOUTHWESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...AND
NORTHWESTERN BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...AND
NORTHEASTERN PROVIDENCE COUNTY IN RHODE ISLAND...

AT 717 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 PLAINVILLE...OR NEAR NORTH ATTLEBOROUGH...MOVING EAST AT
30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WRENTHAM...ATTLEBOROUGH...FOXBOROUGH...MANSFIELD AND NORTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4208 7145 4208 7114 4183 7111 4192 7147
TIME...MOT...LOC 2319Z 279DEG 24KT 4198 7137

$$

DOODY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 12:05 AM EDTSpecial Marine WarningBOX40 min
Aug 10, 12:38 AM EDTSpecial Marine WarningBOX52 min
Aug 10, 12:47 AM EDTAreal Flood AdvisoryBOXEssex, Middlesex, Norfolk, Suffolk2 hr
Aug 10, 3:49 AM EDTSmall Craft Advisory for Hazardous SeasBOX23 hr
Aug 10, 3:53 AM EDTAreal Flood WarningBOXMiddlesex99 min
Aug 10, 3:19 PM EDTSpecial Weather StatementBOXHampshire56 min
Aug 10, 4:22 PM EDTSpecial Weather StatementBOXWorcester53 min
Aug 10, 5:28 PM EDTSpecial Weather StatementBOXWorcester47 min
Aug 10, 6:13 PM EDTSpecial Weather StatementBOXNorfolk62 min
Aug 10, 7:39 PM EDTSevere Thunderstorm WarningBOXBristol, Norfolk, Plymouth51 min
Aug 10, 6:42 PM EDTSpecial Weather StatementBOXProvidence63 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2011Severe Thunderstorm Warnings in Rhode Island, 2011Every severe thunderstorm warning in 2011

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.