Alert archive / Connecticut / Tornado Warnings in 2009

Tornado Warning 1, NWS Boston/Norton, MA

June 26, 2009Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this tornado warning at Jun 26, 2009, 5:10 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It was in force for 35 min. 2 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 26, 2009, 5:10 PM EDT (21:10 UTC)
Expired: Jun 26, 2009, 5:45 PM EDT
In force: 35 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT

The radar

The Brookhaven radar (KOKX), 101 km from the middle of the area, began a volume at 21:11 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 26, 5:25 PM EDT	HAIL 1	Windham, CT	HAIL FROM 3/4 TO 1 INCH IN DIAMETER IN SOUTH WINDHAM
Jun 26, 5:35 PM EDT	TSTM WND DMG	Hebron, CT	SEVERAL TREES DOWN

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, 9.2 hours before the alert went out and 101 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: 4 J/kg
Mixed-layer CIN: -380 J/kg
Mixed-layer LCL: 1367 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 70 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.

527 
WFUS51 KBOX 262110
TORBOX
CTC003-013-015-262145-
/O.NEW.KBOX.TO.W.0001.090626T2110Z-090626T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
510 PM EDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME SOUTHEASTERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...
  SOUTH CENTRAL TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  SOUTHWESTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  THIS INCLUDES THE CITY OF WILLIMANTIC...

* UNTIL 545 PM EDT

* AT 507 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  MARLBOROUGH...OR 6 MILES NORTHEAST OF EAST HAMPTON...MOVING EAST AT
  25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE... HEBRON...COLUMBIA AND
  WINDHAM

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND OR IS EXPECTED TO DEVELOP SHORTLY. 

MOST TORNADOES IN SOUTHERN NEW ENGLAND ARE OBSCURED DUE TO
SURROUNDING TERRAIN. TAKE COVER NOW AND DO NOT TRY TO SEE THE
TORNADO! IF YOU WAIT TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO
GET TO SAFETY. GO INDOORS TO THE BASEMENT OR SMALL INTERIOR ROOM ON
THE LOWEST FLOOR. STAY AWAY FROM WINDOWS. ABANDON MOBILE HOMES FOR A
STRONG BUILDING.

LAT...LON 4173 7244 4171 7211 4165 7212 4166 7217
      4171 7224 4169 7227 4166 7226 4164 7233
      4161 7233 4160 7234 4163 7250
TIME...MOT...LOC 2108Z 273DEG 21KT 4165 7244

$$

RLG/GAF

2 follow-up statements

000 
WWUS51 KBOX 262137
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
537 PM EDT FRI JUN 26 2009

CTC003-013-015-262145-
/O.CON.KBOX.TO.W.0001.000000T0000Z-090626T2145Z/
TOLLAND CT-WINDHAM CT-HARTFORD CT-
537 PM EDT FRI JUN 26 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR EXTREME
SOUTHEASTERN HARTFORD...SOUTHWESTERN WINDHAM AND SOUTH CENTRAL
TOLLAND COUNTIES...

AT 533 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR 
COLUMBIA...OR NEAR WILLIMANTIC...MOVING EAST AT 25 MPH.  

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
WINDHAM.  ONE INCH DIAMETER HAIL HAS BEEN REPORTED IN SOUTH WINDHAM 
CONNECTICUT.  THE CORE OF THE STORM HAS MOVED INTO NEW LONDON 
COUNTY.  DOPPLER RADAR CONTINUES TO INDICATE SOME ROTATION...HOWEVER 
THE THREAT OF A TORNADO REACHING THE GROUND IS DIMINISHING.

&&

LAT...LON 4173 7244 4171 7211 4165 7212 4166 7217
      4171 7224 4169 7227 4166 7226 4164 7233
      4161 7233 4160 7234 4163 7250
TIME...MOT...LOC 2134Z 273DEG 21KT 4164 7224

$$

RLG/GAF

000 
WWUS51 KBOX 262147
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
547 PM EDT FRI JUN 26 2009

CTC003-013-015-262157-
/O.EXP.KBOX.TO.W.0001.000000T0000Z-090626T2145Z/
TOLLAND CT-WINDHAM CT-HARTFORD CT-
547 PM EDT FRI JUN 26 2009

...THE TORNADO WARNING FOR EXTREME SOUTHEASTERN HARTFORD...
SOUTHWESTERN WINDHAM AND SOUTH CENTRAL TOLLAND COUNTIES HAS
EXPIRED...

THE SEVERE THUNDERSTORM HAS WEAKENED CONSIDERABLY AND IS NO LONGER 
CAPABLE OF PRODUCING A TORNADO.  SMALL HAIL AND GUSTY WINDS ARE 
STILL POSSIBLE.

LAT...LON 4173 7244 4171 7211 4165 7212 4166 7217
      4171 7224 4169 7227 4166 7226 4164 7233
      4161 7233 4160 7234 4163 7250
TIME...MOT...LOC 2137Z 273DEG 21KT 4164 7222

$$

RLG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	45 min
Jun 26, 4:23 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	3 hr
Jun 26, 4:41 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	49 min
Jun 26, 4:53 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	52 min
Jun 26, 4:57 PM EDT	Areal Flood Advisory	BOX		85 min
Jun 26, 5:35 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	45 min

Nearby

Tornado Warnings in Connecticut, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.