Alert archive / Connecticut / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 36, NWS Boston/Norton, MA

June 30, 2017Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 30, 2017, 6:06 PM EDT for Capitol Planning Region, Connecticut. It was in force for 24 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 30, 2017, 6:06 PM EDT (22:06 UTC)
Expired: Jun 30, 2017, 6:30 PM EDT
In force: 24 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Capitol Planning Region, CT

The radar

The Brookhaven radar (KOKX), 100 km from the middle of the area, began a volume at 22:09 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 30, 6:11 PM EDT	TSTM WND DMG	Canton, CT	BAHRE CORNER ROAD ... 5 TRANSFORMERS ALONG WITH TREES AND WIRES BLOWN OVER DOWN ONTO THE GROUND.
Jun 30, 6:11 PM EDT	TSTM WND DMG	Canton, CT	TREE DOWN ON EAST HILL ROAD... GRACEY ROAD... AND ON LAWTON ROAD AT WASHBURN ROAD.
Jun 30, 6:15 PM EDT	TSTM WND DMG	Simsbury, CT	TREE DOWN ON CAR ON NOTCH ROAD. TREES DOWN ON WIRES ON WEST MOUNTAIN ROAD AT ROSWELL. TREE DOWN ON ROUTE 10 202 NEAR BIKE PATH.

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 30, 1:41 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.1 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: 60 J/kg
Mixed-layer CIN: -207 J/kg
Mixed-layer LCL: 1070 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

559 
WUUS51 KBOX 302206
SVRBOX
CTC003-302230-
/O.NEW.KBOX.SV.W.0036.170630T2206Z-170630T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Taunton MA
606 PM EDT FRI JUN 30 2017

The National Weather Service in Taunton has issued a

* Severe Thunderstorm Warning for...
  Central Hartford County in northern Connecticut...

* Until 630 PM EDT

* At 604 PM EDT, a severe thunderstorm was located over Avon, or near
  Farmington, moving southeast at 35 mph. 

  HAZARD...60 mph wind gusts and penny size hail. This storm has 
           some rotation and will be monitored closely for a 
           possible tornado.

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to trees and power lines. 

* Locations impacted include...
  Hartford, New Britain, West Hartford, Bristol, Manchester, East
  Hartford, Glastonbury, Newington, Windsor, Wethersfield, South
  Windsor, Farmington, Simsbury, Bloomfield, Berlin, Rocky Hill,
  Avon, Plainville, Cromwell and Canton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4191 7290 4183 7251 4181 7250 4181 7248
      4164 7258 4163 7263 4164 7266 4163 7270
      4174 7297
TIME...MOT...LOC 2204Z 292DEG 30KT 4180 7284 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$
Field

1 follow-up statement

716 
WWUS51 KBOX 302217
SVSBOX

Severe Weather Statement
National Weather Service Taunton MA
617 PM EDT FRI JUN 30 2017

CTC003-302230-
/O.CON.KBOX.SV.W.0036.000000T0000Z-170630T2230Z/
Hartford CT-
617 PM EDT FRI JUN 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL HARTFORD COUNTY...

At 615 PM EDT, a severe thunderstorm was located over West Hartford, 
moving east at 30 mph.  Trees were reported down in Canton with this 
storm.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to trees and power lines. 

Locations impacted include...
Hartford, New Britain, West Hartford, Manchester, East Hartford,
Glastonbury, Newington, Windsor, Wethersfield, South Windsor,
Farmington, Simsbury, Bloomfield, Rocky Hill, Avon and Burlington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4174 7292 4189 7283 4189 7280 4183 7251
      4181 7250 4181 7248 4164 7258
TIME...MOT...LOC 2215Z 280DEG 26KT 4179 7274 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$
Field

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 5:31 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	44 min
Jun 30, 6:17 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	118 min
Jun 30, 6:32 PM EDT	Special Weather Statement	BOX		43 min
Jun 30, 6:53 PM EDT	Special Weather Statement	BOX		37 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2017 Every severe thunderstorm warning in 2017

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.