Alert archive / Connecticut / Flash Flood Warnings in 2012

Flash Flood Warning 32, NWS New York, NY

September 28, 2012Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Sep 28, 2012, 2:18 PM EDT for Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut. It was in force for 117 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 28, 2012, 2:18 PM EDT (18:18 UTC)
Expired
Sep 28, 2012, 4:15 PM EDT
In force
117 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

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

The radar

The Brookhaven radar (KOKX), 64 km from the middle of the area, began a volume at 18:20 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

TimeReportWhereRemark
Sep 28, 2:35 PM EDTFLASH FLOODWest Haven, CTFIRE DEPARTMENT DISPATCHED TO RESCUE STRANDED MOTORISTS IN FLOOD WATERS ON PAINTER AVENUE AND ALSO CAMBELL AVENUE AT CLARK STREET.
Sep 28, 2:42 PM EDTFLASH FLOODNew Haven, CTROUTE 34 CLOSED IN THE CITY OF NEW HAVEN DUE TO FLOODING.

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, 6.3 hours before the alert went out and 64 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 2012-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
691 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
372 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

350 
WGUS51 KOKX 281818
FFWOKX
CTC007-009-282015-
/O.NEW.KOKX.FF.W.0032.120928T1818Z-120928T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
218 PM EDT FRI SEP 28 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MIDDLESEX COUNTY IN SOUTHERN CONNECTICUT...
  EASTERN NEW HAVEN COUNTY IN SOUTHERN CONNECTICUT...

* UNTIL 415 PM EDT...

* AT 211 PM EDT...AN AREA OF HEAVY RAINFALL CONTINUES TO MOVE SLOWLY 
NORTHEAST ACROSS NEW HAVEN COUNTY AND INTO MIDDLESEX COUNTY IN 
CONNECTICUT. FLASH FLOODING HAS ALREADY BEEN REPORTED ACROSS 
ROADWAYS FROM WITH THESE THUNDERSTORMS. BETWEEN 2 AND 4 INCHES OF 
RAIN HAS BEEN OBSERVED IN PORTIONS OF SOUTHERN CONNECTICUT...WITH 
BETWEEN 1 AND 2 ADDITIONAL INCHES POSSIBLE. EXCESSIVE RUNOFF FROM 
HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND 
STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL 
AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4152 7243 4152 7232 4143 7235 4142 7243
      4136 7237 4127 7244 4127 7262 4124 7271
      4126 7277 4124 7290 4128 7292 4126 7293
      4125 7297 4154 7301 4156 7288 4155 7286
      4157 7283 4156 7282 4163 7266 4164 7250

$$

FIG
1 follow-up statement
224 
WGUS71 KOKX 281933
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
333 PM EDT FRI SEP 28 2012

CTC007-009-282015-
/O.CON.KOKX.FF.W.0032.000000T0000Z-120928T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW HAVEN CT-MIDDLESEX CT-
333 PM EDT FRI SEP 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM EDT FOR
MIDDLESEX AND EASTERN NEW HAVEN COUNTIES...

AT 330 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS UP TO 2 INCHES ARE POSSIBLE ACROSS 
CENTRAL AND EAST CENTRAL MIDDLESEX COUNTY.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4152 7243 4152 7232 4143 7235 4142 7243
      4136 7237 4127 7244 4127 7262 4124 7271
      4126 7277 4124 7290 4128 7292 4126 7293
      4125 7297 4154 7301 4156 7288 4155 7286
      4157 7283 4156 7282 4163 7266 4164 7250

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 28, 8:59 AM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region3 hr
Sep 28, 11:27 AM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region93 min
Sep 28, 12:12 PM EDTAreal Flood AdvisoryOKXNaugatuck Valley Planning Region63 min
Sep 28, 12:27 PM EDTFlash Flood WarningOKXNaugatuck Valley Planning Region2 hr
Sep 28, 2:07 PM EDTSpecial Weather StatementOKX53 min
Sep 28, 3:07 PM EDTSpecial Weather StatementOKX23 min
Sep 28, 3:28 PM EDTSpecial Weather StatementOKX47 min
Sep 28, 3:55 PM EDTAreal Flood AdvisoryOKXLower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region80 min
Sep 28, 4:59 PM EDTSpecial Weather StatementOKX46 min
Sep 28, 5:23 PM EDTAreal Flood AdvisoryOKXSoutheastern Connecticut Planning Region82 min

Nearby

Flash Flood Warnings in Connecticut, 2012Every flash flood 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.