Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 55, NWS New York, NY

July 26, 2012Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this severe thunderstorm warning at Jul 26, 2012, 6:59 PM EDT for Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut. It was in force for 91 min. 3 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 26, 2012, 6:59 PM EDT (22:59 UTC)
Expired: Jul 26, 2012, 8:30 PM EDT
In force: 91 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Lower Connecticut River Valley Planning Region, CT, Naugatuck Valley Planning Region, CT

The radar

The Brookhaven radar (KOKX), 67 km from the middle of the area, began a volume at 23:02 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 26, 7:40 PM EDT	TSTM WND DMG	Ansonia, CT	TREES AND WIRES DOWN CLOSING TREMONT ST.
Jul 26, 7:45 PM EDT	TSTM WND DMG	Milford, CT	TREE DOWN ON WIRES AND BLOCKING GRANVILLE AVE
Jul 26, 8:24 PM EDT	TSTM WND DMG	1 S Whitneyville, CT	TREE DOWN AT EAST ROCK RD AND FARNAM DR

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
Jul 26, 3:57 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.0 hours before the alert went out and 67 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1459 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 160 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.

270 
WUUS51 KOKX 262259
SVROKX
CTC007-009-270030-
/O.NEW.KOKX.SV.W.0055.120726T2259Z-120727T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
659 PM EDT THU JUL 26 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MIDDLESEX COUNTY IN SOUTHERN CONNECTICUT...
  NEW HAVEN COUNTY IN SOUTHERN CONNECTICUT...

* UNTIL 830 PM EDT...

* AT 654 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS 
  WERE LOCATED ALONG A LINE EXTENDING FROM POUGHKEEPSIE TO 6 MILES
  WEST OF PAWLING TO PEEKSKILL...AND MOVING EAST AT 50 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4152 7243 4153 7232 4144 7230 4142 7243
      4127 7233 4124 7290 4128 7292 4117 7310
      4123 7311 4130 7306 4150 7333 4152 7317
      4156 7316 4164 7298 4164 7293 4156 7294
      4155 7286 4158 7275 4163 7271 4165 7251
TIME...MOT...LOC 2258Z 276DEG 42KT 4172 7379 4157 7365
          4124 7380

$$

MPS

3 follow-up statements

944 
WWUS51 KOKX 262338
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
738 PM EDT THU JUL 26 2012

CTC007-009-270030-
/O.CON.KOKX.SV.W.0055.000000T0000Z-120727T0030Z/
NEW HAVEN CT-MIDDLESEX CT-
738 PM EDT THU JUL 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR MIDDLESEX AND NEW HAVEN COUNTIES...

AT 733 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS WERE LOCATED 
ALONG A LINE EXTENDING FROM WOODBURY CENTER TO STRATFORD...MOVING 
EAST AT 50 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

IN ADDITION TO DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS 
ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS SEEK SHELTER 
NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4152 7243 4153 7232 4144 7230 4142 7243
      4127 7233 4124 7290 4128 7292 4117 7310
      4123 7311 4130 7306 4150 7333 4152 7317
      4156 7316 4164 7298 4164 7293 4156 7294
      4155 7286 4158 7275 4163 7271 4165 7251
TIME...MOT...LOC 2336Z 279DEG 43KT 4167 7315 4151 7310
          4121 7312 4100 7334

$$

MPS

751 
WWUS51 KOKX 270017
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
817 PM EDT THU JUL 26 2012

CTC009-270027-
/O.CAN.KOKX.SV.W.0055.000000T0000Z-120727T0030Z/
NEW HAVEN CT-
817 PM EDT THU JUL 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NEW HAVEN COUNTY IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

LAT...LON 4165 7251 4152 7243 4153 7232 4144 7231
      4142 7243 4127 7233 4126 7254 4132 7258
      4133 7261 4138 7261 4144 7265 4142 7275
      4148 7274 4158 7275 4163 7271
TIME...MOT...LOC 0017Z 280DEG 38KT 4157 7256 4140 7247
          4122 7246

$$

CTC007-270030-
/O.CON.KOKX.SV.W.0055.000000T0000Z-120727T0030Z/
MIDDLESEX CT-
817 PM EDT THU JUL 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR MIDDLESEX COUNTY...

AT 816 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 PORTLAND TO CHESTER TO WESTBROOK...OR ALONG A LINE
EXTENDING FROM EAST HAMPTON TO CHESTER TO CLINTON...MOVING EAST AT 45
MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS 
ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4165 7251 4152 7243 4153 7232 4144 7231
      4142 7243 4127 7233 4126 7254 4132 7258
      4133 7261 4138 7261 4144 7265 4142 7275
      4148 7274 4158 7275 4163 7271
TIME...MOT...LOC 0017Z 280DEG 38KT 4157 7256 4140 7247
          4122 7246

$$

MPS

296 
WWUS51 KOKX 270024
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
824 PM EDT THU JUL 26 2012

CTC007-270035-
/O.EXP.KOKX.SV.W.0055.000000T0000Z-120727T0030Z/
MIDDLESEX CT-
824 PM EDT THU JUL 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR MIDDLESEX COUNTY WILL EXPIRE
AT 830 PM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM THURSDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

LAT...LON 4165 7251 4152 7243 4153 7232 4144 7231
      4142 7243 4127 7233 4126 7254 4132 7258
      4133 7261 4138 7261 4144 7265 4142 7275
      4148 7274 4158 7275 4163 7271
TIME...MOT...LOC 0025Z 280DEG 38KT 4155 7245 4138 7236
          4120 7235

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 7:51 AM EDT	Special Weather Statement	OKX		39 min
Jul 26, 6:14 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region	61 min
Jul 26, 7:13 PM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region	44 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 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.