Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 42, NWS Boston/Norton, MA

June 9, 2011Capitol Planning Region, Connecticut; 4 counties in Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 9, 2011, 4:00 PM EDT for Capitol Planning Region, Connecticut; 4 counties in Massachusetts. It was in force for 60 min. 7 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: Jun 9, 2011, 4:00 PM EDT (20:00 UTC)
Expired: Jun 9, 2011, 5:00 PM EDT
In force: 60 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Capitol Planning Region, CT, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Worcester County, MA

The radar

The Albany radar (KENX), 108 km from the middle of the area, began a volume at 20:03 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

Time	Report	Where	Remark
Jun 9, 4:38 PM EDT	HAIL 0.88	Westfield, MA	LARGE BRANCHES DOWN
Jun 9, 4:39 PM EDT	TSTM WND DMG	Agawam, MA	LARGE LIMB DOWN BLOCKING SPRINGFIELD STREET
Jun 9, 4:40 PM EDT	TSTM WND DMG	West Springfield, MA	TREE DOWN ON CAR ON COLD SPRING AVENUE
Jun 9, 4:44 PM EDT	TSTM WND DMG	Springfield, MA	LARGE TREE DOWN ON 2 HOUSES ON QUINCY STREET
Jun 9, 4:48 PM EDT	TSTM WND DMG	Springfield, MA	TREES AND WIRES DOWN ON CAR WITH PERSON TRAPPED INSIDE
Jun 9, 4:49 PM EDT	TSTM WND DMG	Longmeadow, MA	MULTIPLE TREES AND WIRES DOWN ACROSS TOWN
Jun 9, 5:05 PM EDT	TSTM WND DMG	Enfield, CT	TREE 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.

Issued	Product	Office	Lasted
Jun 9, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.0 hours before the alert went out and 100 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: 588 J/kg
Mixed-layer CIN: -266 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

548 
WUUS51 KBOX 092000
SVRBOX
CTC003-013-MAC011-013-015-027-092100-
/O.NEW.KBOX.SV.W.0042.110609T2000Z-110609T2100Z/

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  NORTHERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF WINDSOR LOCKS...
  NORTHWESTERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  EXTREME SOUTHEASTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...SPRINGFIELD...CHICOPEE...
  SOUTHERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF NORTHAMPTON...

* UNTIL 500 PM EDT

* AT 400 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 7 MILES NORTH OF MIDDLEFIELD TO
  31 MILES WEST OF TOLLAND...OR ALONG A LINE EXTENDING FROM 17 MILES
  SOUTH OF NORTH ADAMS TO 32 MILES NORTHWEST OF TORRINGTON...AND WAS
  MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...CHESTER...WESTHAMPTON...
  HUNTINGTON...BLANDFORD...RUSSELL...EASTHAMPTON...MONTGOMERY...
  SOUTHAMPTON...SOUTH HADLEY...HOLYOKE...GRANBY...WESTFIELD...
  GRANVILLE...BELCHERTOWN...WILBRAHAM...WEST SPRINGFIELD...WEST
  BROOKFIELD...WARREN...WARE...SOUTHWICK...PALMER...NORTH
  BROOKFIELD...MONSON...LUDLOW...LONGMEADOW...HAMPDEN...EAST
  LONGMEADOW...AGAWAM...SUFFIELD...SIMSBURY...ENFIELD...EAST
  GRANBY...BLOOMFIELD AND AVON.

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 4214 7308 4216 7303 4230 7301 4233 7307
      4237 7307 4230 7201 4178 7276 4185 7296
      4189 7295 4190 7292 4197 7290 4197 7303
      4203 7302 4204 7306 4211 7308
TIME...MOT...LOC 2000Z 280DEG 34KT 4245 7301 4212 7362

$$

KJC

2 follow-up statements

217 
WWUS51 KBOX 092030
SVSBOX

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

CTC003-013-MAC011-013-015-027-092100-
/O.CON.KBOX.SV.W.0042.000000T0000Z-110609T2100Z/
HARTFORD CT-TOLLAND CT-WORCESTER MA-FRANKLIN MA-HAMPSHIRE MA-
HAMPDEN MA-
430 PM EDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR HAMPDEN...SOUTHEASTERN HAMPSHIRE...EXTREME SOUTHEASTERN
FRANKLIN...WEST CENTRAL WORCESTER...NORTHWESTERN TOLLAND AND NORTHERN
HARTFORD COUNTIES...

AT 430 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 NORTHAMPTON TO 7 MILES
SOUTHWEST OF GRANVILLE...OR ALONG A LINE EXTENDING FROM NORTHAMPTON
TO 15 MILES NORTHEAST OF TORRINGTON...MOVING EAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MONTGOMERY...SOUTHAMPTON...EASTHAMPTON...WESTFIELD...HOLYOKE...SOUTH
HADLEY...SOUTHWICK...GRANBY...WEST SPRINGFIELD...SIMSBURY...
CHICOPEE...BELCHERTOWN...AGAWAM...EAST GRANBY...BLOOMFIELD...
LUDLOW...SPRINGFIELD...SUFFIELD...LONGMEADOW...WINDSOR LOCKS...
WILBRAHAM...WEST BROOKFIELD...WARREN...WARE...PALMER...NORTH
BROOKFIELD...MONSON...HAMPDEN...ENFIELD AND EAST LONGMEADOW

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 4213 7297 4235 7272 4230 7201 4178 7276
      4185 7296 4189 7295 4190 7292 4197 7290
      4197 7303 4203 7302
TIME...MOT...LOC 2030Z 280DEG 35KT 4236 7264 4203 7299

$$

KJC

500 
WWUS51 KBOX 092058
SVSBOX

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

CTC003-013-MAC011-013-015-027-092109-
/O.EXP.KBOX.SV.W.0042.000000T0000Z-110609T2100Z/
HARTFORD CT-TOLLAND CT-WORCESTER MA-FRANKLIN MA-HAMPSHIRE MA-
HAMPDEN MA-
458 PM EDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR HAMPDEN...SOUTHEASTERN
HAMPSHIRE...EXTREME SOUTHEASTERN FRANKLIN...WEST CENTRAL WORCESTER...
NORTHWESTERN TOLLAND AND NORTHERN HARTFORD COUNTIES WILL EXPIRE AT
500 PM EDT...

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 4213 7297 4235 7272 4230 7201 4178 7276
      4185 7296 4189 7295 4190 7292 4197 7290
      4197 7303 4203 7302
TIME...MOT...LOC 2059Z 280DEG 35KT 4231 7226 4198 7262

$$

KJC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 8:12 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	48 min
Jun 8, 9:23 PM EDT	Special Weather Statement	BOX		22 min
Jun 8, 9:42 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	48 min
Jun 9, 12:37 AM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	38 min
Jun 9, 1:04 AM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	41 min
Jun 9, 1:40 AM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	50 min
Jun 9, 6:54 AM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	51 min
Jun 9, 4:39 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	66 min
Jun 9, 4:46 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	3 hr
Jun 9, 4:54 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	54 min
Jun 9, 5:24 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	66 min
Jun 9, 5:52 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	53 min
Jun 8, 8:37 PM EDT	Special Weather Statement	BOX	Franklin	23 min
Jun 8, 8:56 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Worcester	49 min
Jun 8, 10:21 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Norfolk, Plymouth	24 min
Jun 8, 10:33 PM EDT	Severe Thunderstorm Warning	BOX	Bristol, Plymouth	42 min
Jun 8, 10:34 PM EDT	Special Marine Warning	BOX		41 min
Jun 8, 10:41 PM EDT	Special Marine Warning	BOX		49 min
Jun 8, 10:51 PM EDT	Special Marine Warning	BOX		39 min
Jun 8, 10:52 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Bristol, Dukes, Plymouth	38 min
Jun 8, 11:17 PM EDT	Special Marine Warning	BOX		58 min
Jun 9, 12:19 AM EDT	Special Marine Warning	BOX		41 min
Jun 9, 2:12 AM EDT	Special Marine Warning	BOX		48 min
Jun 9, 2:22 AM EDT	Severe Thunderstorm Warning	BOX	Bristol, Plymouth	23 min
Jun 9, 2:36 AM EDT	Special Marine Warning	BOX		54 min
Jun 9, 2:42 AM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Bristol, Dukes, Plymouth	27 min
Jun 9, 2:53 AM EDT	Special Marine Warning	BOX		52 min
Jun 9, 8:38 AM EDT	Special Weather Statement	BOX	Norfolk, Plymouth	52 min
Jun 9, 10:21 AM EDT	Special Weather Statement	BOX	Hampshire	39 min
Jun 9, 10:24 AM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	22 min
Jun 9, 3:00 PM EDT	Special Weather Statement	BOX	Franklin, Hampshire	90 min
Jun 9, 3:06 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	54 min
Jun 9, 3:55 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire, Middlesex, Worcester	65 min
Jun 9, 3:57 PM EDT	Special Marine Warning	BOX		108 min
Jun 9, 4:23 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Franklin, Hampshire, Middlesex, Norfolk, Suffolk and 1 more	67 min
Jun 9, 5:00 PM EDT	Special Marine Warning	BOX		2 hr
Jun 9, 5:38 PM EDT	Special Marine Warning	BOX		112 min
Jun 9, 6:13 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Bristol, Plymouth	62 min
Jun 9, 6:14 PM EDT	Special Marine Warning	BOX		2 hr
Jun 9, 6:49 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Dukes, Nantucket	56 min

Nearby

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