Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 74, NWS Boston/Norton, MA

July 26, 2011Capitol Planning Region, Connecticut; Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 26, 2011, 4:09 PM EDT for Capitol Planning Region, Connecticut; Hampden County, Hampshire County, Massachusetts. It was in force for 66 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: Jul 26, 2011, 4:09 PM EDT (20:09 UTC)
Expired: Jul 26, 2011, 5:15 PM EDT
In force: 66 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

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

The radar

The Albany radar (KENX), 109 km from the middle of the area, began a volume at 20:10 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
Jul 26, 4:26 PM EDT	TSTM WND DMG	Westfield, MA	TREES DOWN ON PONTUSSIC AND HARRIS STREETS.
Jul 26, 4:26 PM EDT	HAIL 0.75	West Springfield, MA
Jul 26, 4:27 PM EDT	HIGH SUST WINDS 80	Chicopee, MA
Jul 26, 4:27 PM EDT	NON-TSTM WND GST 70	Chicopee, MA
Jul 26, 4:30 PM EDT	FUNNEL CLOUD	West Springfield, MA
Jul 26, 4:44 PM EDT	HIGH SUST WINDS 41	1 Wnw Windsor Locks, CT	BDL ASOS
Jul 26, 4:51 PM EDT	TSTM WND DMG	Enfield, CT	LARGE BRANCHES DOWN ON SPRING STREET NEAR THE SUFFIELD LINE. WIRES DOWN ON TAYLOR ROAD.

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
Jul 26, 2:30 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.2 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: 72 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 36 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.

237 
WUUS51 KBOX 262009
SVRBOX
CTC003-MAC013-015-262115-
/O.NEW.KBOX.SV.W.0074.110726T2009Z-110726T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
409 PM EDT TUE JUL 26 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF WINDSOR LOCKS...
  WESTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  THIS INCLUDES THE CITY OF SPRINGFIELD...
  SOUTH CENTRAL HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 515 PM EDT

* AT 406 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 7 MILES
  WEST OF TOLLAND...OR 18 MILES NORTH OF TORRINGTON...AND WAS MOVING
  EAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...CHESTER...BLANDFORD...
  HUNTINGTON...RUSSELL...GRANVILLE...MONTGOMERY...WESTFIELD...
  SOUTHWICK...GRANBY...WEST SPRINGFIELD...EAST GRANBY...SUFFIELD...
  AGAWAM...LONGMEADOW...ENFIELD AND EAST WINDSOR.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT LIGHTNING WAS
OCCURRING WITH THIS STORM. GET INDOORS OR INSIDE A VEHICLE NOW! DO
NOT SEEK SHELTER UNDER TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

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

&&

LAT...LON 4211 7307 4214 7308 4215 7304 4230 7301
      4213 7254 4184 7254 4192 7291 4197 7290
      4197 7303 4203 7302 4204 7306 4211 7308
TIME...MOT...LOC 2008Z 284DEG 26KT 4209 7313

$$

FRANK

2 follow-up statements

709 
WWUS51 KBOX 262037
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
437 PM EDT TUE JUL 26 2011

MAC015-262046-
/O.CAN.KBOX.SV.W.0074.000000T0000Z-110726T2115Z/
HAMPSHIRE MA-
437 PM EDT TUE JUL 26 2011

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

THE SEVERE THUNDERSTORM WARNING HAS EXITED THE COUNTY WARNING AREA.  
THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED.

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

LAT...LON 4197 7299 4201 7295 4204 7297 4211 7308
      4205 7296 4210 7296 4213 7294 4221 7286
      4213 7254 4184 7254 4192 7291 4197 7290
TIME...MOT...LOC 2036Z 284DEG 26KT 4204 7287

$$

CTC003-MAC013-262115-
/O.CON.KBOX.SV.W.0074.000000T0000Z-110726T2115Z/
HARTFORD CT-HAMPDEN MA-
437 PM EDT TUE JUL 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHWESTERN HAMPDEN AND NORTHERN HARTFORD COUNTIES...

AT 432 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 GRANVILLE...OR 15 MILES NORTHWEST OF WINDSOR LOCKS...
MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
WESTFIELD...SOUTHWICK...GRANBY...EAST 
GRANBY...SUFFIELD...AGAWAM...LONGMEADOW...AND ENFIELD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4197 7299 4201 7295 4204 7297 4211 7308
      4205 7296 4210 7296 4213 7294 4221 7286
      4213 7254 4184 7254 4192 7291 4197 7290
TIME...MOT...LOC 2036Z 284DEG 26KT 4204 7287

$$

FRANK

543 
WWUS51 KBOX 262100
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
500 PM EDT TUE JUL 26 2011

CTC003-MAC013-262115-
/O.CON.KBOX.SV.W.0074.000000T0000Z-110726T2115Z/
HARTFORD CT-HAMPDEN MA-
500 PM EDT TUE JUL 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTH CENTRAL HAMPDEN AND NORTH CENTRAL HARTFORD COUNTIES...

AT 458 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 7 MILES SOUTHEAST OF WINDSOR LOCKS...OR NEAR VERNON...MOVING
SOUTHEAST AT 35 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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!

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

&&

LAT...LON 4190 7278 4194 7274 4195 7276 4199 7278
      4198 7274 4201 7269 4203 7268 4208 7266
      4215 7266 4213 7254 4184 7254
TIME...MOT...LOC 2100Z 307DEG 35KT 4184 7254

$$

FRANK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 4:51 PM EDT	Tornado Warning	BOX	Northeastern Connecticut Planning Region	39 min
Jul 26, 4:52 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	53 min
Jul 26, 4:59 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	98 min
Jul 26, 5:06 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	39 min
Jul 26, 5:26 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	106 min
Jul 26, 5:30 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	45 min
Jul 26, 3:13 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	62 min
Jul 26, 4:10 PM EDT	Special Weather Statement	BOX	Franklin	65 min
Jul 26, 4:14 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire, Worcester	99 min
Jul 26, 4:15 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	60 min
Jul 26, 4:28 PM EDT	Tornado Warning	BOX	Hampden, Hampshire	47 min
Jul 26, 6:22 PM EDT	Areal Flood Advisory	BOX	Bristol, Middlesex, Norfolk, Worcester	53 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.