Alert archive / Connecticut / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 44, NWS Boston/Norton, MA

June 9, 2011Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 9, 2011, 4:39 PM EDT for Capitol Planning Region, Connecticut. It was in force for 66 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, 4:39 PM EDT (20:39 UTC)
Expired: Jun 9, 2011, 5:45 PM EDT
In force: 66 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Capitol Planning Region, CT

The radar

The Brookhaven radar (KOKX), 96 km from the middle of the area, began a volume at 20:41 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, 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

Brookhaven, NY (KOKX), launched 12:00Z, 8.7 hours before the alert went out and 96 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: 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.

890 
WUUS51 KBOX 092039
SVRBOX
CTC003-013-092145-
/O.NEW.KBOX.SV.W.0044.110609T2039Z-110609T2145Z/

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

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITIES OF...WINDSOR LOCKS...WEST HARTFORD...
  NEWINGTON...NEW BRITAIN...MANCHESTER...HARTFORD...EAST HARTFORD...
  BRISTOL...
  NORTHWESTERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF VERNON...

* UNTIL 545 PM EDT

* AT 436 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 WEST OF SIMSBURY TO 34
  MILES SOUTHWEST OF BRISTOL...OR ALONG A LINE EXTENDING FROM 12
  MILES NORTHEAST OF TORRINGTON TO 23 MILES WEST OF SHELTON...AND WAS
  MOVING EAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...BURLINGTON...CANTON...
  GRANBY...AVON...EAST GRANBY...SUFFIELD...BLOOMFIELD...PLAINVILLE...
  FARMINGTON...WINDSOR...ENFIELD...EAST WINDSOR...SOUTH WINDSOR...
  SOUTHINGTON...WETHERSFIELD...SOMERS...ELLINGTON...BERLIN...
  GLASTONBURY...ROCKY HILL...TOLLAND...BOLTON AND STAFFORD.

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 4181 7295 4188 7295 4190 7292 4194 7291
      4203 7240 4202 7221 4164 7251 4162 7271
      4157 7276 4155 7282 4156 7284 4154 7285
      4156 7288 4156 7295 4164 7294 4164 7299
      4180 7302
TIME...MOT...LOC 2039Z 279DEG 27KT 4191 7290 4143 7349

$$

KJC

1 follow-up statement

186 
WWUS51 KBOX 092142
SVSBOX

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

CTC003-013-092153-
/O.EXP.KBOX.SV.W.0044.000000T0000Z-110609T2145Z/
HARTFORD CT-TOLLAND CT-
542 PM EDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN TOLLAND AND
HARTFORD COUNTIES WILL EXPIRE AT 545 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 4181 7295 4188 7295 4190 7292 4194 7291
      4203 7240 4202 7221 4164 7251 4162 7271
      4157 7276 4155 7282 4156 7284 4154 7285
      4156 7288 4156 7295 4164 7294 4164 7299
      4180 7302
TIME...MOT...LOC 2143Z 279DEG 27KT 4183 7226 4136 7286

$$

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, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	60 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

Nearby

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.