Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 89, NWS New York, NY

September 18, 2012Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut; Nassau County, Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Sep 18, 2012, 9:09 PM EDT for Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut; Nassau County, Suffolk County, New York. It was in force for 51 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: Sep 18, 2012, 9:09 PM EDT (01:09 UTC)
Expired: Sep 18, 2012, 10:00 PM EDT
In force: 51 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Greater Bridgeport Planning Region, CT, Lower Connecticut River Valley Planning Region, CT, Naugatuck Valley Planning Region, CT, Nassau County, NY, Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 26 km from the middle of the area, began a volume at 01:12 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
Sep 18, 9:11 PM EDT	TSTM WND DMG	Rock Raymond, CT	TREE DOWN AND POWER POLE SNAPPED ON HIGH RIDGE RD
Sep 18, 9:47 PM EDT	MARINE TSTM WIND 44	Amity Harbor, NY	MESONET

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
Sep 18, 3:38 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.2 hours before the alert went out and 26 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: 270 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 629 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 667 m²/s²
0-3 km storm-relative helicity: 699 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

182 
WUUS51 KOKX 190109
SVROKX
CTC001-007-009-NYC059-103-190200-
/O.NEW.KOKX.SV.W.0089.120919T0109Z-120919T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
909 PM EDT TUE SEP 18 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FAIRFIELD COUNTY IN SOUTHERN CONNECTICUT...
  MIDDLESEX COUNTY IN SOUTHERN CONNECTICUT...
  NASSAU COUNTY IN SOUTHEAST NEW YORK...
  SUFFOLK COUNTY IN SOUTHEAST NEW YORK...
  NEW HAVEN COUNTY IN SOUTHERN CONNECTICUT...

* UNTIL 1000 PM EDT...

* AT 904 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM WOLCOTT TO BEACON FALLS TO DERBY TO WESTPORT TO HUNTINGTON   
  STATION TO 22 MILES SOUTHWEST OF ATLANTIC BEACH...OR ALONG A LINE 
  EXTENDING FROM BRISTOL TO NAUGATUCK TO SHELTON TO 6 MILES 
  NORTHEAST OF NORWALK TO HUNTINGTON STATION TO LONG BRANCH NEW 
  JERSEY...AND MOVING NORTHEAST AT 45 MPH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THESE STORMS HAVE A HISTORY OR PRODUCING WIND GUSTS UP TO 60 MPH. 
IF YOU ARE IN THEIR PATH ...PREPARE IMMEDIATELY FOR DAMAGING WINDS. 
PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY INSIDE A STRONG 
BUILDING AND AWAY FROM WINDOWS.

&&

LAT...LON 4164 7250 4127 7256 4124 7290 4128 7292
      4105 7340 4091 7324 4098 7312 4096 7287
      4072 7307 4070 7321 4064 7318 4066 7311
      4064 7320 4070 7323 4065 7321 4058 7375
      4155 7317 4164 7297 4155 7285 4165 7251
TIME...MOT...LOC 0107Z 234DEG 40KT 4170 7295 4148 7303
          4135 7304 4116 7328 4087 7335 4032 7387
          4010 7396

$$

GOODMAN

1 follow-up statement

008 
WWUS51 KOKX 190143
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
943 PM EDT TUE SEP 18 2012

CTC001-NYC059-190153-
/O.CAN.KOKX.SV.W.0089.000000T0000Z-120919T0200Z/
NASSAU NY-FAIRFIELD CT-
943 PM EDT TUE SEP 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR FAIRFIELD AND NASSAU COUNTIES
IS CANCELLED...

THE STRONGEST STORMS HAVE MOVED OFF TO THE EAST. 

LAT...LON 4165 7251 4127 7256 4128 7292 4119 7312
      4098 7312 4095 7287 4065 7313 4071 7313
      4065 7315 4065 7316 4070 7315 4062 7342
      4094 7350 4094 7336 4130 7306 4143 7324
      4155 7317 4164 7297 4155 7285
TIME...MOT...LOC 0143Z 224DEG 53KT 4167 7273 4145 7287
          4131 7288 4106 7309 4063 7338 4043 7347

$$

CTC007-009-NYC103-190200-
/O.CON.KOKX.SV.W.0089.000000T0000Z-120919T0200Z/
NEW HAVEN CT-SUFFOLK NY-MIDDLESEX CT-
943 PM EDT TUE SEP 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR MIDDLESEX...SUFFOLK AND NEW HAVEN COUNTIES...

AT 938 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTH OF MERIDEN TO HAMDEN TO WEST HAVEN TO
OLD FIELD TO 6 MILES SOUTH OF AMITYVILLE TO 22 MILES SOUTH OF
AMITYVILLE...OR ALONG A LINE EXTENDING FROM NEW BRITAIN TO 6 MILES
NORTH OF NEW HAVEN TO NEW HAVEN TO 7 MILES NORTHWEST OF PORT
JEFFERSON TO 6 MILES SOUTH OF MASSAPEQUA TO 17 MILES SOUTHEAST OF
LONG BEACH...MOVING NORTHEAST AT 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO 
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY 
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 4165 7251 4127 7256 4128 7292 4119 7312
      4098 7312 4095 7287 4065 7313 4071 7313
      4065 7315 4065 7316 4070 7315 4062 7342
      4094 7350 4094 7336 4130 7306 4143 7324
      4155 7317 4164 7297 4155 7285
TIME...MOT...LOC 0143Z 224DEG 53KT 4167 7273 4145 7287
          4131 7288 4106 7309 4063 7338 4043 7347

$$

GOODMAN

The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 18, 8:21 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	54 min
Sep 18, 8:29 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	46 min
Sep 18, 9:04 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region	86 min
Sep 18, 9:31 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	59 min
Sep 18, 9:42 PM EDT	Flash Flood Warning	OKX	Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	93 min
Sep 18, 9:58 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region	62 min
Sep 18, 10:45 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region	60 min
Sep 18, 11:21 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region	54 min
Sep 18, 11:45 PM EDT	Special Weather Statement	OKX		45 min
Sep 19, 12:18 AM EDT	Areal Flood Advisory	OKX	Southeastern Connecticut Planning Region	117 min
Sep 19, 12:40 AM EDT	Special Weather Statement	OKX		65 min
Sep 18, 8:10 PM EDT	Special Marine Warning	OKX		65 min
Sep 18, 8:30 PM EDT	Areal Flood Advisory	OKX	Kings, Queens	45 min
Sep 18, 9:20 PM EDT	Special Marine Warning	OKX		55 min
Sep 18, 9:26 PM EDT	Special Marine Warning	OKX		94 min
Sep 18, 9:34 PM EDT	Tornado Warning	OKX	Suffolk	26 min
Sep 18, 9:35 PM EDT	Areal Flood Advisory	OKX	Nassau	55 min
Sep 18, 9:47 PM EDT	Flash Flood Warning	OKX	Nassau, Suffolk	88 min
Sep 18, 10:18 PM EDT	Special Marine Warning	OKX		57 min
Sep 18, 10:31 PM EDT	Special Marine Warning	OKX		59 min
Sep 18, 10:41 PM EDT	Severe Thunderstorm Warning	OKX	Suffolk	22 min
Sep 18, 10:59 PM EDT	Special Marine Warning	OKX		31 min
Sep 18, 11:12 PM EDT	Special Marine Warning	OKX		63 min
Sep 19, 12:51 AM EDT	Special Marine Warning	OKX		24 min
Sep 19, 3:39 AM EDT	Small Craft Advisory	OKX		14 hr
Sep 19, 5:46 PM EDT	Small Craft Advisory	OKX		22 hr

Nearby

Severe Thunderstorm Warnings in Connecticut, 2012 Severe Thunderstorm Warnings in New York, 2012 Every severe thunderstorm warning 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.