Alert archive / Connecticut / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 60, NWS Boston/Norton, MA

July 6, 2011Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 6, 2011, 10:34 PM EDT for Capitol Planning Region, Connecticut. It was in force for 41 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: Jul 6, 2011, 10:34 PM EDT (02:34 UTC)
Expired: Jul 6, 2011, 11:15 PM EDT
In force: 41 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Capitol Planning Region, CT

The radar

The Brookhaven radar (KOKX), 117 km from the middle of the area, began a volume at 02:36 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 6, 10:40 PM EDT	TSTM WND DMG	Simsbury, CT	LARGE LIMBS DOWN ON WIRES ALONG FIRETOWN ROAD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 2.6 hours before the alert went out and 117 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: 418 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

827 
WUUS51 KBOX 070234
SVRBOX
CTC003-013-070315-
/O.NEW.KBOX.SV.W.0060.110707T0234Z-110707T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
1034 PM EDT WED JUL 6 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF WINDSOR LOCKS...
  EXTREME WEST CENTRAL TOLLAND COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 1115 PM EDT

* AT 1031 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
  SIMSBURY...OR 7 MILES WEST OF WINDSOR LOCKS...AND WAS MOVING EAST
  AT 20 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...WINDSOR AND EAST WINDSOR.

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 4195 7251 4181 7251 4186 7283 4193 7281
TIME...MOT...LOC 0234Z 274DEG 18KT 4189 7277

$$
FIELD

1 follow-up statement

786 
WWUS51 KBOX 070251
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1051 PM EDT WED JUL 6 2011

CTC003-013-070315-
/O.CON.KBOX.SV.W.0060.000000T0000Z-110707T0315Z/
HARTFORD CT-TOLLAND CT-
1051 PM EDT WED JUL 6 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR EXTREME WEST CENTRAL TOLLAND AND CENTRAL HARTFORD COUNTIES...

AT 1048 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 BETWEEN WINDSOR AND WINDSOR LOCKS...MOVING EAST AT 20 MPH.

AT 1040 PM...AMATEUR RADIO OPERATORS REPORTED LARGE TREE LIMBS DOWN 
ON WIRES IN SIMSBURY. 

LAT...LON 4191 7272 4195 7251 4181 7251 4185 7275
TIME...MOT...LOC 0246Z 274DEG 18KT 4189 7269

$$
FIELD

The office that day

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

Issued	Product	Office	Lasted
Jul 6, 8:39 PM EDT	Special Weather Statement	BOX	36 min
Jul 6, 10:25 PM EDT	Special Weather Statement	BOX	35 min
Jul 6, 11:05 PM EDT	Special Weather Statement	BOX	40 min
Jul 6, 11:23 PM EDT	Special Weather Statement	BOX	37 min
Jul 6, 11:55 PM EDT	Special Weather Statement	BOX	50 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.