Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 20, NWS Boston/Norton, MA

June 22, 2012Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 22, 2012, 4:31 PM EDT for Northeastern Connecticut Planning Region, Connecticut. It was in force for 44 min. 3 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 22, 2012, 4:31 PM EDT (20:31 UTC)
Expired: Jun 22, 2012, 5:15 PM EDT
In force: 44 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Northeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 82 km from the middle of the area, began a volume at 20:31 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 22, 4:36 PM EDT	TSTM WND DMG	Windham, CT	TREES AND WIRES DOWN NEAR THE NEW WINDHAM SCHOOL
Jun 22, 4:45 PM EDT	TSTM WND DMG	Canterbury, CT	MULTIPLE TREES AND WIRES DOWN ON ROUTE 14
Jun 22, 4:45 PM EDT	TSTM WND DMG	Scotland, CT	TREES AND WIRES DOWN ON PUDDING HILL RD

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 22, 1:41 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.5 hours before the alert went out and 115 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: 840 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1512 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

899 
WUUS51 KBOX 222031
SVRBOX
CTC013-015-222115-
/O.NEW.KBOX.SV.W.0020.120622T2031Z-120622T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
431 PM EDT FRI JUN 22 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  SOUTHERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF PLAINFIELD...

* UNTIL 515 PM EDT

* AT 427 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 NEAR
  SCOTLAND...OR 6 MILES EAST OF WILLIMANTIC...AND WAS MOVING
  NORTHEAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...HAMPTON...CANTERBURY...
  BROOKLYN...STERLING...DANIELSON AND KILLINGLY.

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 900 PM EDT FRIDAY
EVENING FOR NORTHERN CONNECTICUT AND WESTERN MASSACHUSETTS.

&&

LAT...LON 4166 7215 4166 7217 4169 7221 4176 7223
      4191 7181 4165 7180 4163 7196
TIME...MOT...LOC 2031Z 246DEG 20KT 4170 7208

$$

MLD

2 follow-up statements

675 
WWUS51 KBOX 222050
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
450 PM EDT FRI JUN 22 2012

CTC013-222100-
/O.CAN.KBOX.SV.W.0020.000000T0000Z-120622T2115Z/
TOLLAND CT-
450 PM EDT FRI JUN 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL TOLLAND COUNTY IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR NORTHERN CONNECTICUT AND WESTERN MASSACHUSETTS.

LAT...LON 4165 7199 4167 7203 4172 7206 4182 7206
      4191 7181 4165 7180 4163 7196
TIME...MOT...LOC 2050Z 246DEG 20KT 4174 7195

$$

CTC015-222115-
/O.CON.KBOX.SV.W.0020.000000T0000Z-120622T2115Z/
WINDHAM CT-
450 PM EDT FRI JUN 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHEASTERN WINDHAM COUNTY...

AT 448 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 CANTERBURY...OR NEAR PLAINFIELD...MOVING NORTHEAST AT 25
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BROOKLYN...STERLING...DANIELSON AND KILLINGLY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR NORTHERN CONNECTICUT AND WESTERN MASSACHUSETTS.

&&

LAT...LON 4165 7199 4167 7203 4172 7206 4182 7206
      4191 7181 4165 7180 4163 7196
TIME...MOT...LOC 2050Z 246DEG 20KT 4174 7195

$$

MLD

206 
WWUS51 KBOX 222109
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
509 PM EDT FRI JUN 22 2012

CTC015-222120-
/O.EXP.KBOX.SV.W.0020.000000T0000Z-120622T2115Z/
WINDHAM CT-
509 PM EDT FRI JUN 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WINDHAM COUNTY
WILL EXPIRE AT 515 PM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR NORTHERN CONNECTICUT AND WESTERN MASSACHUSETTS.

LAT...LON 4165 7199 4167 7203 4172 7206 4182 7206
      4191 7181 4165 7180 4163 7196
TIME...MOT...LOC 2110Z 246DEG 20KT 4178 7181

$$

MLD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 3:14 PM EDT	Special Weather Statement	BOX		61 min
Jun 22, 3:31 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	59 min
Jun 22, 4:01 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	3 hr
Jun 22, 4:02 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	35 min
Jun 22, 4:22 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	3 hr
Jun 22, 4:23 PM EDT	Special Weather Statement	BOX		67 min
Jun 22, 4:26 PM EDT	Special Weather Statement	BOX		64 min
Jun 22, 4:36 PM EDT	Flash Flood Warning	BOX	Capitol Planning Region	3 hr

Nearby

Severe Thunderstorm Warnings in Connecticut, 2012 Every severe thunderstorm warning in 2012

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.