Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 76, NWS New York, NY

September 8, 2012Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this severe thunderstorm warning at Sep 8, 2012, 1:12 PM EDT for Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 8, 2012, 1:12 PM EDT (17:12 UTC)
Expired
Sep 8, 2012, 1:35 PM EDT
In force
23 min
Issued by
NWS New York, NY
Area
Storm-based polygon

Counties Greater Bridgeport Planning Region, CT, Naugatuck Valley Planning Region, CT

The radar

The Brookhaven radar (KOKX), 79 km from the middle of the area, began a volume at 17:14 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 8, 11:18 AM EDTTornado WatchSPC10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.2 hours before the alert went out and 79 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2012-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 173 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2012-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
173 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

015 
WUUS51 KOKX 081712
SVROKX
CTC001-009-081745-
/O.NEW.KOKX.SV.W.0076.120908T1712Z-120908T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
112 PM EDT SAT SEP 8 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 145 PM EDT...

* AT 110 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR NEWTOWN...AND MOVING
  NORTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO   
  SOUTHBURY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED ROTATION WITHIN THIS STORM. WHILE NOT 
IMMEDIATELY LIKELY...A TORNADO COULD DEVELOP. 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 4157 7310 4131 7331 4139 7352 4153 7345
      4150 7343 4152 7339 4149 7337 4148 7333
      4150 7333 4151 7332 4152 7327 4152 7317
      4155 7317
TIME...MOT...LOC 1712Z 205DEG 29KT 4144 7336

$$

GOODMAN
1 follow-up statement
455 
WWUS51 KOKX 081735
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
135 PM EDT SAT SEP 8 2012

CTC001-009-081744-
/O.CAN.KOKX.SV.W.0076.000000T0000Z-120908T1745Z/
NEW HAVEN CT-FAIRFIELD CT-
135 PM EDT SAT SEP 8 2012

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

THE STORM HAS MOVED INTO LITCHFIELD COUNTY...WHERE A SEVERE 
THUNDERSTORM WARNING IS IN EFFECT. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM.

LAT...LON 4157 7310 4131 7331 4139 7352 4153 7345
      4150 7343 4152 7339 4149 7337 4148 7333
      4150 7333 4151 7332 4152 7327 4152 7317
      4155 7317
TIME...MOT...LOC 1734Z 205DEG 29KT 4160 7326

$$

GOODMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 11:46 AM EDTSpecial Weather StatementOKX59 min
Sep 8, 11:54 AM EDTTornado WarningOKXGreater Bridgeport Planning Region36 min
Sep 8, 12:16 PM EDTSpecial Weather StatementOKX59 min
Sep 8, 12:23 PM EDTTornado WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region22 min
Sep 8, 12:58 PM EDTSpecial Weather StatementOKX62 min
Sep 8, 2:13 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region32 min
Sep 8, 2:24 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region36 min
Sep 8, 3:00 PM EDTTornado WarningOKXGreater Bridgeport Planning Region30 min
Sep 8, 5:04 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region86 min
Sep 8, 6:11 PM EDTSevere Thunderstorm WarningOKXNaugatuck Valley Planning Region64 min
Sep 8, 6:22 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region38 min
Sep 8, 7:09 PM EDTSpecial Weather StatementOKX66 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.