Alert archive / Connecticut / Tornado Warnings in 2012

Tornado Warning 4, NWS Boston/Norton, MA

August 10, 2012Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this tornado warning at Aug 10, 2012, 4:22 PM EDT for Capitol Planning Region, Connecticut. It was in force for 38 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: Aug 10, 2012, 4:22 PM EDT (20:22 UTC)
Expired: Aug 10, 2012, 5:00 PM EDT
In force: 38 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Capitol Planning Region, CT

The radar

The Brookhaven radar (KOKX), 99 km from the middle of the area, began a volume at 20:23 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
Aug 10, 4:28 PM EDT	TSTM WND DMG	East Glastonbury, CT	TREES AND WIRES DOWN ON RTE 2 AND RTE 83
Aug 10, 4:28 PM EDT	TSTM WND DMG	Glastonbury, CT	NUMEROUS TREES DOWN
Aug 10, 4:55 PM EDT	TSTM WND DMG	Manchester, CT	TREE DOWN ON I-84...TREES AND WIRES DOWN ON EAST CENTER AND PICKENS STREETS
Aug 10, 5:06 PM EDT	TSTM WND DMG	Vernon, CT	BRANCHES DOWN ON VERNON CIRCLE.
Aug 10, 5:07 PM EDT	TSTM WND DMG	Rockville, CT	SEVERAL LARGE LIMBS DOWN ON UNION STREET

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
Aug 10, 3:31 PM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.4 hours before the alert went out and 99 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: 1737 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

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

120 
WFUS51 KBOX 102022
TORBOX
CTC003-013-102100-
/O.NEW.KBOX.TO.W.0004.120810T2022Z-120810T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
422 PM EDT FRI AUG 10 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF MANCHESTER...
  WEST CENTRAL TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF VERNON...

* UNTIL 500 PM EDT

* AT 419 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES SOUTH OF
  GLASTONBURY...OR NEAR EAST HAMPTON...MOVING NORTH AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...BOLTON...TOLLAND AND
  ELLINGTON.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS 
ROTATION HAS BEEN NOTED ABOVE THE GROUND AND HAS THE POTENTIAL TO 
EXTEND TO THE SURFACE. TAKE COVER NOW! MOVE TO AN INTERIOR ROOM ON 
THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE 
HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL 
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR
NORTHERN CONNECTICUT AND SOUTHEASTERN MASSACHUSETTS AND CENTRAL RHODE
ISLAND.

&&

LAT...LON 4193 7257 4188 7235 4162 7249 4163 7250
      4164 7251 4163 7261 4163 7262 4164 7264
TIME...MOT...LOC 2021Z 197DEG 25KT 4161 7258

$$

WTB

1 follow-up statement

001 
WWUS51 KBOX 102050
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
450 PM EDT FRI AUG 10 2012

CTC003-013-102100-
/O.CON.KBOX.TO.W.0004.000000T0000Z-120810T2100Z/
HARTFORD CT-TOLLAND CT-
450 PM EDT FRI AUG 10 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR WEST
CENTRAL TOLLAND AND EAST CENTRAL HARTFORD COUNTIES...

AT 448 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR MANCHESTER...
MOVING NORTH AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
VERNON...ROCKVILLE...TOLLAND AND ELLINGTON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS 
ROTATION HAS BEEN NOTED ABOVE THE GROUND AND HAS THE POTENTIAL TO 
EXTEND TO THE SURFACE. TAKE COVER NOW! MOVE TO AN INTERIOR ROOM ON 
THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE 
HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL 
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4193 7257 4188 7235 4162 7249 4163 7250
      4164 7251 4163 7261 4163 7262 4164 7264
TIME...MOT...LOC 2049Z 197DEG 25KT 4180 7250

$$

WTB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 11:52 AM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	6 hr
Aug 10, 3:10 PM EDT	Special Weather Statement	BOX		50 min
Aug 10, 3:36 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	2 hr
Aug 10, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	45 min
Aug 10, 4:45 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	45 min
Aug 10, 4:56 PM EDT	Flash Flood Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	2 hr
Aug 10, 4:57 PM EDT	Flash Flood Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	2 hr
Aug 10, 5:00 PM EDT	Tornado Warning	BOX	Capitol Planning Region	45 min
Aug 10, 5:31 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	44 min

Nearby

Tornado Warnings in Connecticut, 2012 Every tornado warning in 2012 Tornadoes 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.