Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 36, NWS Boston/Norton, MA

June 9, 20114 counties in Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 9, 2011, 2:42 AM EDT for 4 counties in Massachusetts. It was in force for 27 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
Jun 9, 2011, 2:42 AM EDT (06:42 UTC)
Expired
Jun 9, 2011, 3:09 AM EDT
In force
27 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

Counties Barnstable County, MA, Bristol County, MA, Dukes County, MA, Plymouth County, MA

The radar

The Boston radar (KBOX), 57 km from the middle of the area, began a volume at 06:45 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 nearest sounding before it

Chatham, MA (KCHH), launched 00:00Z, 6.7 hours before the alert went out and 69 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 00:00Z on 2011-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 522 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, Chatham, MA at 00:00Z on 2011-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
522 J/kg
Mixed-layer CIN
-245 J/kg
Mixed-layer LCL
1312 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
131 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.

978 
WUUS51 KBOX 090642
SVRBOX
MAC001-005-007-023-090730-
/O.NEW.KBOX.SV.W.0036.110609T0642Z-110609T0730Z/

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN BARNSTABLE COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF FALMOUTH...
  SOUTHEASTERN BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF NEW BEDFORD...
  DUKES COUNTY IN SOUTHEAST MASSACHUSETTS...
  THIS INCLUDES THE CITY OF VINEYARD HAVEN...
  SOUTH CENTRAL PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...

* UNTIL 330 AM EDT

* AT 241 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL WITH  
  WIND GUSTS OF 40 TO 50 MPH. THIS STORM WAS LOCATED NEAR NEW        
  BEDFORD...AND WAS MOVING SOUTHEAST AT 50 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...DARTMOUTH...ACUSHNET...
  MATTAPOISETT...AQUINNAH...CHILMARK...WEST TISBURY...TISBURY...OAK
  BLUFFS AND EDGARTOWN.

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 4130 7079 4135 7085 4147 7067 4141 7094
      4152 7074 4162 7089 4144 7093 4150 7102
      4162 7113 4178 7104 4168 7071 4167 7071
      4169 7074 4162 7085 4151 7072 4166 7065
      4160 7044 4150 7070 4143 7045 4134 7045
TIME...MOT...LOC 0642Z 298DEG 41KT 4165 7098

$$

SIPPRELL
2 follow-up statements
663 
WWUS51 KBOX 090655
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
255 AM EDT THU JUN 9 2011

MAC023-090705-
/O.CAN.KBOX.SV.W.0036.000000T0000Z-110609T0730Z/
PLYMOUTH MA-
255 AM EDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL PLYMOUTH COUNTY
IS CANCELLED...

LAT...LON 4130 7079 4135 7085 4136 7078 4147 7067
      4149 7071 4141 7093 4150 7075 4160 7081
      4151 7073 4155 7066 4166 7064 4160 7044
      4149 7070 4146 7055 4139 7049 4142 7045
      4134 7045
TIME...MOT...LOC 0655Z 298DEG 41KT 4158 7081

$$

MAC001-005-007-090730-
/O.CON.KBOX.SV.W.0036.000000T0000Z-110609T0730Z/
DUKES MA-BARNSTABLE MA-BRISTOL MA-
255 AM EDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM EDT
FOR EXTREME SOUTHEASTERN BRISTOL...SOUTHWESTERN BARNSTABLE AND DUKES
COUNTIES IN SOUTHEAST MASSACHUSETTS...

AT 253 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...ALONG WITH GUSTY WINDS IN EXCESS OF 40 MPH.  THIS STORM WAS 
LOCATED 12 MILES WEST OF FALMOUTH...OR 7 MILES SOUTHEAST OF NEW 
BEDFORD...MOVING SOUTHEAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
AQUINNAH...CHILMARK...WEST TISBURY...TISBURY...VINEYARD HAVEN...OAK
BLUFFS AND EDGARTOWN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS...POTENTIALLY LARGE HAIL...AND DEADLY 
CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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

&&

LAT...LON 4130 7079 4135 7085 4136 7078 4147 7067
      4149 7071 4141 7093 4150 7075 4160 7081
      4151 7073 4155 7066 4166 7064 4160 7044
      4149 7070 4146 7055 4139 7049 4142 7045
      4134 7045
TIME...MOT...LOC 0655Z 298DEG 41KT 4158 7081

$$

SIPPRELL
800 
WWUS51 KBOX 090709
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
309 AM EDT THU JUN 9 2011

MAC001-005-007-090719-
/O.CAN.KBOX.SV.W.0036.000000T0000Z-110609T0730Z/
DUKES MA-BARNSTABLE MA-BRISTOL MA-
309 AM EDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR BRISTOL...SOUTHWESTERN
BARNSTABLE AND DUKES COUNTIES IN SOUTHEAST MASSACHUSETTS IS
CANCELLED...

STORMS HAVE MOVED OUT OF THE WARNED AREA AND THERE IS NO LONGER ANY 
THREAT OF SEVERE WEATHER.

LAT...LON 4130 7079 4135 7085 4136 7078 4147 7067
      4149 7071 4141 7093 4150 7075 4160 7081
      4151 7073 4155 7066 4166 7064 4160 7044
      4149 7070 4146 7055 4139 7049 4142 7045
      4134 7045
TIME...MOT...LOC 0709Z 298DEG 41KT 4150 7062

$$

SIPPRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 8:12 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire48 min
Jun 8, 8:37 PM EDTSpecial Weather StatementBOXFranklin23 min
Jun 8, 8:56 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire, Worcester49 min
Jun 8, 9:42 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Worcester48 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, 12:37 AM EDTSevere Thunderstorm WarningBOXHampden, Hampshire38 min
Jun 9, 1:04 AM EDTSevere Thunderstorm WarningBOXHampden, Worcester41 min
Jun 9, 1:40 AM EDTSevere Thunderstorm WarningBOXBristol50 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, 2:53 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, 4:00 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire, Worcester60 min
Jun 9, 4:23 PM EDTSevere Thunderstorm WarningBOXEssex, Franklin, Hampshire, Middlesex, Norfolk, Suffolk and 1 more67 min
Jun 9, 4:54 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire, Middlesex, Worcester54 min
Jun 9, 5:00 PM EDTSpecial Marine WarningBOX2 hr
Jun 9, 5:24 PM EDTSevere Thunderstorm WarningBOXBarnstable, Bristol, Essex, Middlesex, Norfolk, Plymouth and 2 more66 min
Jun 9, 5:38 PM EDTSpecial Marine WarningBOX112 min
Jun 9, 5:52 PM EDTSevere Thunderstorm WarningBOXBristol53 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

Nearby

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