Alert archive / Connecticut / Flash Flood Warnings in 2012

Flash Flood Warning 31, NWS New York, NY

September 28, 2012Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Sep 28, 2012, 12:27 PM EDT for Naugatuck Valley Planning Region, Connecticut. It was in force for 2 hr. 5 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, 12:27 PM EDT (16:27 UTC)
Expired: Sep 28, 2012, 2:30 PM EDT
In force: 2 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Naugatuck Valley Planning Region, CT

The radar

The Brookhaven radar (KOKX), 48 km from the middle of the area, began a volume at 16:27 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 28, 12:45 PM EDT	FLASH FLOOD	1 Se Forest Heights, CT	CAR STRANDED IN FLOOD WATERS ON I-95 IN MILFORD.
Sep 28, 1:13 PM EDT	FLASH FLOOD	1 Ese Forest Heights, CT	FLOODING AT MILFORD MALL. WATER INTO FIRST FLOOR.
Sep 28, 1:15 PM EDT	FLASH FLOOD	Milford, CT	25 HOMES AND BUSINESSES FLOODED INCLUDING THE CITY HALL IN MILFORD. TIME ESTIMATED BY RADAR.
Sep 28, 2:12 PM EDT	FLASH FLOOD	New Haven, CT	STATE STREET IN DOWNTOWN NEW HAVEN CLOSED DUE TO FLOODING.
Sep 28, 2:35 PM EDT	FLASH FLOOD	West Haven, CT	FIRE DEPARTMENT DISPATCHED TO RESCUE STRANDED MOTORISTS IN FLOOD WATERS ON PAINTER AVENUE AND ALSO CAMBELL AVENUE AT CLARK STREET.

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, 4.5 hours before the alert went out and 48 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: 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.

431 
WGUS51 KOKX 281627
FFWOKX
CTC009-281800-
/O.NEW.KOKX.FF.W.0031.120928T1627Z-120928T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1227 PM EDT FRI SEP 28 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 200 PM EDT...

* AT 1223 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA MOVING 
NORTHEAST FROM SOUTHERN FAIRFIELD INTO SOUTHERN NEW HAVEN. BETWEEN 1 
AND 2 INCHES OF RAINFALL HAS ALREADY FALLEN IN PORTIONS OF SOUTHERN 
NEW HAVEN...AND UP TO AN ADDITIONAL 1 TO 2 INCHES IS POSSIBLE.

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 4142 7275 4144 7265 4138 7261 4133 7261
      4126 7253 4127 7262 4124 7271 4125 7273
      4123 7276 4126 7277 4124 7290 4128 7292
      4126 7292 4120 7301 4120 7306 4117 7311
      4123 7311 4130 7306 4137 7315 4151 7275

$$

JP

2 follow-up statements

508 
WGUS71 KOKX 281704
FFSOKX

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

CTC009-281800-
/O.CON.KOKX.FF.W.0031.000000T0000Z-120928T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW HAVEN CT-
104 PM EDT FRI SEP 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 PM EDT FOR NEW
HAVEN COUNTY...

AT 1257 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED 
AREA. BETWEEN 2 AND 3 INCHES OF RAINFALL HAS BEEN REPORTED...WITH AN 
ADDITIONAL HALF INCH TO AN INCH 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 4142 7275 4144 7265 4138 7261 4133 7261
      4126 7253 4127 7262 4124 7271 4125 7273
      4123 7276 4126 7277 4124 7290 4128 7292
      4126 7292 4120 7301 4120 7306 4117 7311
      4123 7311 4130 7306 4137 7315 4151 7275

$$

JP

206 
WGUS51 KOKX 281756
FFWOKX
CTC009-281830-
/O.EXT.KOKX.FF.W.0031.000000T0000Z-120928T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS EXTENDED THE

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

* UNTIL 230 PM EDT...

* AT 149 PM EDT...THUNDERSTORMS CONTINUE TO SLOWLY MOVE NORTHEAST 
OVER SOUTHERN NEW HAVEN COUNTY. THE PUBLIC REPORTED FLASH FLOODING 
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 IS 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 4142 7275 4144 7265 4138 7261 4133 7261
      4126 7253 4127 7262 4124 7271 4125 7273
      4123 7276 4126 7277 4124 7290 4128 7292
      4126 7292 4120 7301 4120 7306 4117 7311
      4123 7311 4130 7306 4137 7315 4151 7275

$$

JP

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 8:59 AM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region	3 hr
Sep 28, 11:27 AM EDT	Flash Flood Warning	OKX	Greater Bridgeport Planning Region	93 min
Sep 28, 12:12 PM EDT	Areal Flood Advisory	OKX	Naugatuck Valley Planning Region	63 min
Sep 28, 2:07 PM EDT	Special Weather Statement	OKX		53 min
Sep 28, 2:18 PM EDT	Flash Flood Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region	117 min
Sep 28, 3:07 PM EDT	Special Weather Statement	OKX		23 min
Sep 28, 3:28 PM EDT	Special Weather Statement	OKX		47 min
Sep 28, 3:55 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region	80 min
Sep 28, 4:59 PM EDT	Special Weather Statement	OKX		46 min
Sep 28, 5:23 PM EDT	Areal Flood Advisory	OKX	Southeastern Connecticut Planning Region	82 min

Nearby

Flash Flood Warnings in Connecticut, 2012 Every 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.