Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 45, NWS Boston/Norton, MA

June 9, 2011Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; 4 counties in Massachusetts; Providence County, Rhode Island

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 9, 2011, 4:54 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut; 4 counties in Massachusetts; Providence County, Rhode Island. It was in force for 54 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 9, 2011, 4:54 PM EDT (20:54 UTC)
Expired
Jun 9, 2011, 5:48 PM EDT
In force
54 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Worcester County, MA, Providence County, RI

The radar

The Boston radar (KBOX), 76 km from the middle of the area, began a volume at 20:55 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
Jun 9, 5:05 PM EDTTSTM WND DMGEnfield, CTTREE ON ROOF ON GREEN VALLEY DR

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.

IssuedProductOfficeLasted
Jun 9, 2:34 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 137 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, Brookhaven, NY at 12:00Z on 2011-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1610 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2011-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
1610 J/kg
Mixed-layer CIN
-193 J/kg
Mixed-layer LCL
1424 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

734 
WUUS51 KBOX 092054
SVRBOX
CTC003-013-015-MAC013-015-017-027-RIC007-092200-
/O.NEW.KBOX.SV.W.0045.110609T2054Z-110609T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
454 PM EDT THU JUN 9 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN PROVIDENCE COUNTY IN RHODE ISLAND...
  SOUTHERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...WORCESTER...MILFORD...
  NORTHERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...WINDSOR LOCKS...MANCHESTER...
  HARTFORD...EAST HARTFORD...
  TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...VERNON...MANSFIELD...
  WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...WILLIMANTIC...PUTNAM...PLAINFIELD...
  SOUTH CENTRAL MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS...
  EASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHEASTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 600 PM EDT

* AT 450 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 WERE
  LOCATED ALONG A LINE EXTENDING FROM WARE TO AVON...OR ALONG A LINE
  EXTENDING FROM 16 MILES SOUTHEAST OF AMHERST TO 7 MILES NORTHWEST
  OF WEST HARTFORD...AND WAS MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...PALMER...BLOOMFIELD...
  ENFIELD...HAMPDEN...NEW BRAINTREE...WARREN...WEST BROOKFIELD...
  WINDSOR...NORTH BROOKFIELD...MONSON...SOMERS...SOUTH WINDSOR...EAST
  WINDSOR...BROOKFIELD...EAST BROOKFIELD...BRIMFIELD...ELLINGTON...
  SPENCER...WALES...STAFFORD...LEICESTER...HOLLAND...BOLTON...
  STURBRIDGE...TOLLAND...SOUTHBRIDGE...CHARLTON...ANDOVER...UNION...
  AUBURN...WILLINGTON...COVENTRY...COLUMBIA...OXFORD...DUDLEY...
  SUTTON...GRAFTON...EASTFORD...WEBSTER...ASHFORD...WINDHAM...
  MILLBURY...WOODSTOCK...CHAPLIN...NORTHBRIDGE...UPTON...SCOTLAND...
  HOPKINTON...POMFRET...WHITINSVILLE...HAMPTON...DOUGLAS...
  THOMPSON...HOPEDALE...CANTERBURY...UXBRIDGE...HOLLISTON...
  BROOKLYN...MENDON...BURRILLVILLE...KILLINGLY...DANIELSON...
  MILLVILLE...GLOCESTER AND FOSTER.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4234 7227 4221 7138 4215 7148 4209 7149
      4163 7190 4166 7217 4171 7224 4169 7226
      4167 7226 4180 7286
TIME...MOT...LOC 2054Z 273DEG 37KT 4227 7218 4186 7275

$$

KJC
3 follow-up statements
478 
WWUS51 KBOX 092117
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
517 PM EDT THU JUN 9 2011

MAC015-092127-
/O.CAN.KBOX.SV.W.0045.000000T0000Z-110609T2200Z/
HAMPSHIRE MA-
517 PM EDT THU JUN 9 2011

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

LAT...LON 4229 7185 4221 7140 4215 7148 4213 7148
      4212 7150 4208 7150 4163 7190 4166 7217
      4171 7224 4169 7226 4167 7226 4180 7286
TIME...MOT...LOC 2117Z 275DEG 37KT 4219 7180 4179 7267

$$

CTC003-013-015-MAC013-017-027-RIC007-092200-
/O.CON.KBOX.SV.W.0045.000000T0000Z-110609T2200Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-MIDDLESEX MA-WORCESTER MA-
PROVIDENCE RI-HAMPDEN MA-
517 PM EDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHEASTERN HAMPDEN...NORTHWESTERN PROVIDENCE...SOUTHERN
WORCESTER...SOUTH CENTRAL MIDDLESEX...WINDHAM...TOLLAND AND CENTRAL
HARTFORD COUNTIES...

AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE 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 AUBURN TO BLOOMFIELD...OR
ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF WORCESTER TO WEST
HARTFORD...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ROCKVILLE...EAST HARTFORD...OXFORD...UNION...SUTTON...TOLLAND...
GRAFTON...VERNON...DUDLEY...MANCHESTER...MILLBURY...UPTON...
NORTHBRIDGE...WEBSTER...WILLINGTON...BOLTON...WHITINSVILLE...
HOPKINTON...MANSFIELD...WOODSTOCK...EASTFORD...ANDOVER...MILFORD...
DOUGLAS...HOPEDALE...STORRS...ASHFORD...COVENTRY...HOLLISTON...
UXBRIDGE...COLUMBIA...MENDON...THOMPSON...POMFRET...PUTNAM...
WILLIMANTIC...CHAPLIN...MILLVILLE...WINDHAM...BURRILLVILLE...
HAMPTON...GLOCESTER...FOSTER...SCOTLAND...PLAINFIELD...KILLINGLY...
DANIELSON...CANTERBURY AND BROOKLYN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4229 7185 4221 7140 4215 7148 4213 7148
      4212 7150 4208 7150 4163 7190 4166 7217
      4171 7224 4169 7226 4167 7226 4180 7286
TIME...MOT...LOC 2117Z 275DEG 37KT 4219 7180 4179 7267

$$

KJC
925 
WWUS51 KBOX 092140
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
540 PM EDT THU JUN 9 2011

CTC003-013-MAC013-092150-
/O.CAN.KBOX.SV.W.0045.000000T0000Z-110609T2200Z/
HARTFORD CT-TOLLAND CT-HAMPDEN MA-
540 PM EDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HAMPDEN...TOLLAND
AND CENTRAL HARTFORD COUNTIES IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

LAT...LON 4166 7217 4174 7215 4226 7167 4221 7141
      4215 7148 4213 7148 4212 7150 4208 7150
      4163 7190
TIME...MOT...LOC 2140Z 284DEG 30KT 4217 7155 4169 7198

$$

CTC015-MAC017-027-RIC007-092200-
/O.CON.KBOX.SV.W.0045.000000T0000Z-110609T2200Z/
WINDHAM CT-MIDDLESEX MA-WORCESTER MA-PROVIDENCE RI-
540 PM EDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHWESTERN PROVIDENCE...SOUTHEASTERN WORCESTER...SOUTH CENTRAL
MIDDLESEX AND WINDHAM COUNTIES...

AT 536 PM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM UPTON TO SCOTLAND...OR ALONG A
LINE EXTENDING FROM MILFORD TO PLAINFIELD...MOVING EAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DANIELSON...CANTERBURY...HOPKINTON...BURRILLVILLE...UXBRIDGE...
HOPEDALE...MENDON...FOSTER...MILLVILLE...GLOCESTER AND HOLLISTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4166 7217 4174 7215 4226 7167 4221 7141
      4215 7148 4213 7148 4212 7150 4208 7150
      4163 7190
TIME...MOT...LOC 2140Z 284DEG 30KT 4217 7155 4169 7198

$$

KJC
193 
WWUS51 KBOX 092148
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
548 PM EDT THU JUN 9 2011

CTC015-MAC017-027-RIC007-092158-
/O.CAN.KBOX.SV.W.0045.000000T0000Z-110609T2200Z/
WINDHAM CT-MIDDLESEX MA-WORCESTER MA-PROVIDENCE RI-
548 PM EDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN PROVIDENCE...
SOUTHEASTERN WORCESTER...SOUTH CENTRAL MIDDLESEX AND WINDHAM COUNTIES
IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

LAT...LON 4166 7217 4174 7215 4226 7167 4221 7141
      4215 7148 4213 7148 4212 7150 4208 7150
      4163 7190
TIME...MOT...LOC 2148Z 284DEG 30KT 4215 7146 4167 7190

$$

KJC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 8:12 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region48 min
Jun 8, 9:23 PM EDTSpecial Weather StatementBOX22 min
Jun 8, 9:42 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region48 min
Jun 9, 12:37 AM EDTSevere Thunderstorm WarningBOXCapitol Planning Region38 min
Jun 9, 1:04 AM EDTSevere Thunderstorm WarningBOXCapitol Planning Region, Northeastern Connecticut Planning Region41 min
Jun 9, 1:40 AM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region50 min
Jun 9, 6:54 AM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region51 min
Jun 9, 4:00 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region60 min
Jun 9, 4:39 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region66 min
Jun 9, 4:46 PM EDTAreal Flood AdvisoryBOXCapitol Planning Region3 hr
Jun 9, 5:24 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region66 min
Jun 9, 5:52 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region53 min
Jun 8, 8:37 PM EDTSpecial Weather StatementBOXFranklin23 min
Jun 8, 8:56 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire, Worcester49 min
Jun 8, 10:21 PM EDTSevere Thunderstorm WarningBOXBristol, Norfolk, Plymouth24 min
Jun 8, 10:33 PM EDTSevere Thunderstorm WarningBOXBristol, Plymouth42 min
Jun 8, 10:34 PM EDTSpecial Marine WarningBOX41 min
Jun 8, 10:41 PM EDTSpecial Marine WarningBOX49 min
Jun 8, 10:51 PM EDTSpecial Marine WarningBOX39 min
Jun 8, 10:52 PM EDTSevere Thunderstorm WarningBOXBarnstable, Bristol, Dukes, Plymouth38 min
Jun 8, 11:17 PM EDTSpecial Marine WarningBOX58 min
Jun 9, 12:19 AM EDTSpecial Marine WarningBOX41 min
Jun 9, 2:12 AM EDTSpecial Marine WarningBOX48 min
Jun 9, 2:22 AM EDTSevere Thunderstorm WarningBOXBristol, Plymouth23 min
Jun 9, 2:36 AM EDTSpecial Marine WarningBOX54 min
Jun 9, 2:42 AM EDTSevere Thunderstorm WarningBOXBarnstable, Bristol, Dukes, Plymouth27 min
Jun 9, 2:53 AM EDTSpecial Marine WarningBOX52 min
Jun 9, 8:38 AM EDTSpecial Weather StatementBOXNorfolk, Plymouth52 min
Jun 9, 10:21 AM EDTSpecial Weather StatementBOXHampshire39 min
Jun 9, 10:24 AM EDTSevere Thunderstorm WarningBOXHampden, Hampshire22 min
Jun 9, 3:00 PM EDTSpecial Weather StatementBOXFranklin, Hampshire90 min
Jun 9, 3:06 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire54 min
Jun 9, 3:55 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire, Middlesex, Worcester65 min
Jun 9, 3:57 PM EDTSpecial Marine WarningBOX108 min
Jun 9, 4:23 PM EDTSevere Thunderstorm WarningBOXEssex, Franklin, Hampshire, Middlesex, Norfolk, Suffolk and 1 more67 min
Jun 9, 5:00 PM EDTSpecial Marine WarningBOX2 hr
Jun 9, 5:38 PM EDTSpecial Marine WarningBOX112 min
Jun 9, 6:13 PM EDTSevere Thunderstorm WarningBOXBarnstable, Bristol, Plymouth62 min
Jun 9, 6:14 PM EDTSpecial Marine WarningBOX2 hr
Jun 9, 6:49 PM EDTSevere Thunderstorm WarningBOXBarnstable, Dukes, Nantucket56 min
Jun 8, 10:54 PM EDTSpecial Weather StatementBOXWashington36 min
Jun 9, 2:08 AM EDTSpecial Weather StatementBOXKent, Newport67 min
Jun 9, 6:39 PM EDTSpecial Weather StatementBOXWashington36 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2011Severe Thunderstorm Warnings in Connecticut, 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.