Alert archive / Connecticut / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 13, NWS New York, NY

June 9, 2011Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Putnam County, New York

NWS New York, NY issued this severe thunderstorm warning at Jun 9, 2011, 4:55 PM EDT for Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Putnam County, New York. It was in force for 68 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 9, 2011, 4:55 PM EDT (20:55 UTC)
Expired: Jun 9, 2011, 6:03 PM EDT
In force: 68 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Greater Bridgeport Planning Region, CT, Naugatuck Valley Planning Region, CT, Putnam County, NY

The radar

The Brookhaven radar (KOKX), 66 km from the middle of the area, began a volume at 20:57 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 9, 5:30 PM EDT	TSTM WND GST 58	North Haven, CT
Jun 9, 6:05 PM EDT	TSTM WND GST 61	North Haven, CT	SMALL TREES DOWN

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 9, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 66 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: 1610 J/kg
Mixed-layer CIN: -193 J/kg
Mixed-layer LCL: 1424 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

729 
WUUS51 KOKX 092055
SVROKX
CTC001-009-NYC079-092230-
/O.NEW.KOKX.SV.W.0013.110609T2055Z-110609T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
455 PM EDT THU JUN 9 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL NEW HAVEN COUNTY IN SOUTHERN CONNECTICUT...
  FAIRFIELD COUNTY IN SOUTHERN CONNECTICUT...
  PUTNAM COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 630 PM EDT...

* AT 453 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTH OF BREWSTER 
  TO 8 MILES SOUTHWEST OF BREWSTER...MOVING EAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  DANBURY...BETHEL...NEWTOWN...MONROE...SEYMOUR...SHELTON...DERBY...
  HAMDEN...NEW HAVEN AND NORTH HAVEN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4145 7276 4128 7295 4131 7355 4136 7355
      4136 7364 4141 7369
TIME...MOT...LOC 2054Z 271DEG 28KT 4149 7356 4131 7369

$$

NV

2 follow-up statements

510 
WWUS51 KOKX 092138
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
538 PM EDT THU JUN 9 2011

CTC001-009-NYC079-092230-
/O.CON.KOKX.SV.W.0013.000000T0000Z-110609T2230Z/
PUTNAM NY-FAIRFIELD CT-NEW HAVEN CT-
538 PM EDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL NEW HAVEN...FAIRFIELD AND PUTNAM COUNTIES...

AT 533 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF
BALL SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 8 MILES NORTH OF
NEWTOWN TO BREWSTER...OR ALONG A LINE EXTENDING FROM SOUTHBURY TO
MAHOPAC...MOVING SOUTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BETHEL...OXFORD...MONROE...SEYMOUR...ANSONIA...SHELTON...DERBY...
HAMDEN...NORTH HAVEN AND NEW HAVEN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4145 7276 4128 7295 4131 7355 4136 7355
      4136 7364 4141 7369
TIME...MOT...LOC 2138Z 298DEG 23KT 4151 7324 4133 7364

$$

NV

963 
WWUS51 KOKX 092203
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
603 PM EDT THU JUN 9 2011

CTC001-009-NYC079-092212-
/O.CAN.KOKX.SV.W.0013.000000T0000Z-110609T2230Z/
PUTNAM NY-FAIRFIELD CT-NEW HAVEN CT-
603 PM EDT THU JUN 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NEW HAVEN...FAIRFIELD
AND PUTNAM COUNTIES IS CANCELLED...

THE WARNING WILL BE CANCELLED AS STORMS HAVE MOVED SOUTHEAST OF THE 
REGION.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

LAT...LON 4145 7276 4128 7295 4131 7355 4136 7355
      4136 7364 4141 7369
TIME...MOT...LOC 2202Z 298DEG 23KT 4144 7306 4126 7346

$$

NV

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 9:22 PM EDT	Special Weather Statement	OKX		53 min
Jun 8, 9:33 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	57 min
Jun 9, 1:35 AM EDT	Special Weather Statement	OKX		40 min
Jun 9, 1:44 AM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	46 min
Jun 9, 2:16 AM EDT	Special Weather Statement	OKX		29 min
Jun 9, 9:38 AM EDT	Special Weather Statement	OKX		67 min
Jun 9, 10:31 AM EDT	Special Weather Statement	OKX		1 min
Jun 9, 4:18 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	57 min
Jun 9, 5:09 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	71 min
Jun 9, 5:22 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region	53 min
Jun 8, 10:14 PM EDT	Special Marine Warning	OKX		31 min
Jun 9, 2:12 AM EDT	Special Marine Warning	OKX		48 min
Jun 9, 2:47 AM EDT	Special Weather Statement	OKX	Suffolk	28 min
Jun 9, 3:15 PM EDT	Special Weather Statement	OKX	Orange	60 min
Jun 9, 3:20 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Putnam	55 min
Jun 9, 3:37 PM EDT	Special Weather Statement	OKX	Rockland	53 min
Jun 9, 3:48 PM EDT	Areal Flood Advisory	OKX	Orange	57 min
Jun 9, 4:10 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Putnam	65 min
Jun 9, 4:38 PM EDT	Severe Thunderstorm Warning	OKX	Orange	69 min
Jun 9, 5:27 PM EDT	Special Marine Warning	OKX		80 min
Jun 9, 6:07 PM EDT	Severe Thunderstorm Warning	OKX	Bronx	23 min
Jun 9, 6:14 PM EDT	Special Weather Statement	OKX	Nassau, Suffolk	61 min
Jun 9, 6:23 PM EDT	Severe Thunderstorm Warning	OKX	Westchester	22 min
Jun 9, 6:30 PM EDT	Special Weather Statement	OKX	Rockland	30 min
Jun 9, 6:59 PM EDT	Special Weather Statement	OKX	Bronx, Kings, Nassau, New York, Queens	61 min
Jun 9, 7:57 PM EDT	Special Weather Statement	OKX	Kings, Queens, Richmond	48 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2011 Severe Thunderstorm Warnings in New York, 2011 Every severe thunderstorm warning in 2011

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.