Alert archive / Connecticut / Tornado Warnings in 2013

Tornado Warning 4, NWS Boston/Norton, MA

July 1, 2013Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this tornado warning at Jul 1, 2013, 1:31 PM EDT for Capitol Planning Region, Connecticut. It was in force for 29 min. 5 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 1, 2013, 1:31 PM EDT (17:31 UTC)
Expired: Jul 1, 2013, 2:00 PM EDT
In force: 29 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Capitol Planning Region, CT

The radar

The Boston radar (KBOX), 120 km from the middle of the area, began a volume at 17:32 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 1, 1:33 PM EDT	TSTM WND DMG	Windsor Locks, CT	TREE DOWN ON A HOUSE ON ALICIA TERRACE.
Jul 1, 1:34 PM EDT	FUNNEL CLOUD	Windsor Locks, CT	DROVE HIS 44 FOOT BOX TRUCK WITH 34000 LB LOAD ON ROUTE 20 NEAR I-91 THEN TORRENTIAL RAINS BEGAN. STOPPED TRUCK...THEN STRONG WINDS PARTIALLY LIFTED THE TRUCK 8 INCHES OFF GROUND. SAW TREES SNAPPED. NOTED DEBRIS SPINNING IN ALL DIRECTIONS. AFTER DEBRIS CLEARED
Jul 1, 1:34 PM EDT	TSTM WND DMG	Windsor Locks, CT	4 INCH DIAMETER TREE BRANCHES DOWN. UP TO 8 INCH DIAMETER TREES SNAPPED AND DOWNED IN AREA OF ROUTE 20 AND 91 NEAR BRADLEY AIRPORT.
Jul 1, 1:40 PM EDT	TSTM WND DMG	Windsor Locks, CT	4 INCH DIAMETER TREE BRANCHES DOWN. UP TO 8 INCH DIAMETER TREES SNAPPED AND DOWNED IN AREA OF ROUTE 20 AND 91 NEAR BRADLEY AIRPORT.
Jul 1, 1:55 PM EDT	TSTM WND DMG	Windsor Locks, CT	TREES AND WIRES DOWN ON SOUTH CENTER STREET AND OLD COUNTY 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 12:00Z, 5.5 hours before the alert went out and 121 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: 687 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 438 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

249 
WFUS51 KBOX 011731
TORBOX
CTC003-013-011800-
/O.NEW.KBOX.TO.W.0004.130701T1731Z-130701T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
131 PM EDT MON JUL 1 2013

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  NORTHWESTERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 200 PM EDT
    
* AT 127 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  NEAR WINDSOR LOCKS...AND WAS MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WINDSOR LOCKS...ENFIELD AND SOMERS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! DO NOT WAIT TO SEE THE TORNADO. GO TO A BASEMENT OR
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING...AWAY FROM
WINDOWS. IF IN A VEHICLE...A MOBILE HOME OR OUTDOORS...GET TO THE
CLOSEST SHELTER. PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4187 7264 4192 7269 4202 7250 4198 7244
TIME...MOT...LOC 1730Z 233DEG 18KT 4192 7263 

$$
FIELD

1 follow-up statement

461 
WWUS51 KBOX 011751
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
151 PM EDT MON JUL 1 2013

CTC003-013-011800-
/O.CON.KBOX.TO.W.0004.000000T0000Z-130701T1800Z/
HARTFORD CT-TOLLAND CT-
151 PM EDT MON JUL 1 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR
NORTHEASTERN HARTFORD AND NORTHWESTERN TOLLAND COUNTIES...
    
AT 149 PM EDT...DOPPLER RADAR STILL INDICATED A SEVERE THUNDERSTORM 
CAPABLE OF PRODUCING A TORNADO NEAR ENFIELD...OR 7 MILES NORTHEAST 
OF WINDSOR LOCKS...MOVING NORTHEAST AT 20 MPH. THE STORM HAS BEEN 
SHOWING A WEAKENING TREND BUT STILL COULD BE DANGEROUS.

TREES AND TREE LIMBS WERE REPORTED DOWN IN WINDSOR LOCKS WITH THIS 
STORM.

LOCATIONS IMPACTED INCLUDE...
ENFIELD AND SOMERS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4187 7264 4192 7269 4202 7250 4198 7244
TIME...MOT...LOC 1749Z 233DEG 18KT 4198 7252 

$$
FIELD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 4:01 AM EDT	Flash Flood Watch	BOX	Capitol Planning Region	64 hr
Jul 1, 12:02 PM EDT	Flash Flood Warning	BOX	Capitol Planning Region	3 hr
Jul 1, 1:19 PM EDT	Special Weather Statement	BOX		41 min
Jul 1, 1:59 PM EDT	Severe Thunderstorm Warning	BOX		46 min

Nearby

Tornado Warnings in Connecticut, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.