Alert archive / New York / Flash Flood Warnings in 2012

Flash Flood Warning 30, NWS New York, NY

September 28, 2012Westchester County, New York; Greater Bridgeport Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Sep 28, 2012, 11:27 AM EDT for Westchester County, New York; Greater Bridgeport Planning Region, Connecticut. It was in force for 93 min. 11 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, 11:27 AM EDT (15:27 UTC)
Expired
Sep 28, 2012, 1:00 PM EDT
In force
93 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

Counties Greater Bridgeport Planning Region, CT, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 54 km from the middle of the area, began a volume at 15:26 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, 11:32 AM EDTFLASH FLOOD1 E Eastchester, NYNORTHBOUND HUTCHINSON RIVER PARKWAY CLOSED AT I-95 DUE TO FLOODING. FIRE DEPARTMENT RESCUING PEOPLE STUCK IN FIVE VEHICLES.
Sep 28, 11:32 AM EDTFLASH FLOOD1 Sw Wykagyl, NYRAMP CLOSED ON CROSS COUNTY PARKWAY EAST AT HUTCHINSON PARKWAY
Sep 28, 11:32 AM EDTFLASH FLOODNorth Pelham, NYSOUTHBOUND HUTCHINSON RIVER PARKWAY CLOSED BETWEEN WEBSTER AVENUE AND BOSTON ROAD DUE TO FLOODING.
Sep 28, 11:50 AM EDTFLASH FLOOD1 Wsw East Bridgeport, CTBRIDGEPORT AVENUE AT RAILROAD AVENUE IS FLOODED WITH A CAR STRANDED IN THE WATER.
Sep 28, 12:02 PM EDTFLASH FLOODSaugatuck, CTSOUTHBOUND I-95 CLOSED DUE TO FLOODING BEFORE RAMP TO SAUGATUCK AVENUE.
Sep 28, 12:05 PM EDTFLASH FLOOD1 Ssw Bridgeport, CTFLOODING ON IRANISTAN AVENUE. WATER UP TO CAR DOORS.
Sep 28, 12:05 PM EDTFLASH FLOOD1 Sw East Bridgeport, CTSTREETS CLOSED DUE TO FLOODING IN THE VICINITY OF SEASIDE PARK.
Sep 28, 12:10 PM EDTFLASH FLOOD1 Se Mill Hill, CTWATER INSIDE BUILDING IN STRATFORD.
Sep 28, 12:30 PM EDTFLASH FLOOD1 E Stratford, CTVEHICLES TRAPPED WITH WATER UP TO CAR WINDOWS UNDER RAILROAD TRACKS ON EAST MAIN STREET.
Sep 28, 12:30 PM EDTFLASH FLOOD1 S Stratford, CTFLOODING ON MAIN STREET. WATER UP TO CAR ROOVES UNDER RAILROAD TRACKS.
Sep 28, 12:40 PM EDTFLASH FLOOD1 E Mill Hill, CTSOUTHBOUND I-95 CLOSED AT EXIT 30 DUE TO FLOODING. TIME ESTIMATED BASED ON RADAR.

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, 3.5 hours before the alert went out and 54 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.

215 
WGUS51 KOKX 281527
FFWOKX
CTC001-NYC119-281700-
/O.NEW.KOKX.FF.W.0030.120928T1527Z-120928T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1127 AM EDT FRI SEP 28 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FAIRFIELD COUNTY IN SOUTHERN CONNECTICUT...
  WESTCHESTER COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 100 PM EDT...

* AT 1122 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
FLASH FLOODING FROM THUNDERSTORMS OVER THE WARNED AREA. RAINFALL 
RATES OF 1 TO 2 INCHES PER HOUR HAVE BEEN OBSERVED AND ADDITIONAL 1 
TO 1.5 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 4130 7307 4119 7312 4115 7310 4114 7313
      4116 7320 4111 7326 4110 7334 4105 7340
      4099 7358 4100 7362 4099 7363 4099 7361
      4099 7365 4094 7368 4090 7375 4087 7376
      4092 7392 4110 7372 4143 7323

$$

JP
2 follow-up statements
144 
WGUS71 KOKX 281619
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1219 PM EDT FRI SEP 28 2012

CTC001-NYC119-281700-
/O.CON.KOKX.FF.W.0030.000000T0000Z-120928T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WESTCHESTER NY-FAIRFIELD CT-
1219 PM EDT FRI SEP 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM EDT FOR
FAIRFIELD AND WESTCHESTER COUNTIES...

AT 1214 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER SOUTHERN 
FAIRFIELD COUNTY. ALTHOUGH THE HEAVY RAIN HAS MOVED OUT OF SOUTHERN 
WESTCHESTER COUNTY...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 4130 7307 4119 7312 4115 7310 4114 7313
      4116 7320 4111 7326 4110 7334 4105 7340
      4099 7358 4100 7362 4099 7363 4099 7361
      4099 7365 4094 7368 4090 7375 4087 7376
      4092 7392 4110 7372 4143 7323

$$

JP
123 
WGUS71 KOKX 281700
FFSOKX

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

CTC001-NYC119-281706-
/O.EXP.KOKX.FF.W.0030.000000T0000Z-120928T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WESTCHESTER NY-FAIRFIELD CT-
100 PM EDT FRI SEP 28 2012

...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRED FOR FAIRFIELD 
AND WESTCHESTER COUNTIES...

ALTHOUGH THE HEAVY RAIN HAS MOVED OUT OF THE AREA...BETWEEN 2 TO 3 
INCHES OF RAIN HAS FALLEN IN PORTIONS OF SOUTHERN FAIRFIELD AND 
SOUTHERN WESTCHESTER COUNTIES. RAIN RUNOFF IN THESE AREAS IS STILL 
POSSIBLE. PLEASE CONTINUE TO EXERCISE CAUTION WHEN ARRIVING AT YOUR 
DESTINATION.

LAT...LON 4130 7307 4119 7312 4115 7310 4114 7313
      4116 7320 4111 7326 4110 7334 4105 7340
      4099 7358 4100 7362 4099 7363 4099 7361
      4099 7365 4094 7368 4090 7375 4087 7376
      4092 7392 4110 7372 4143 7323

$$

JP

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 28, 8:46 AM EDTAreal Flood AdvisoryOKXBronx, Kings, Nassau, New York, Queens119 min
Sep 28, 8:59 AM EDTAreal Flood AdvisoryOKXWestchester3 hr
Sep 28, 10:26 AM EDTSpecial Marine WarningOKX64 min
Sep 28, 10:46 AM EDTAreal Flood AdvisoryOKXBronx, Nassau, Queens, Suffolk44 min
Sep 28, 11:19 AM EDTSpecial Marine WarningOKX41 min
Sep 28, 11:21 AM EDTSpecial Weather StatementOKXNassau54 min
Sep 28, 11:49 AM EDTSevere Thunderstorm WarningOKXSuffolk56 min
Sep 28, 11:55 AM EDTSpecial Marine WarningOKX65 min
Sep 28, 12:05 PM EDTSmall Craft AdvisoryOKX4 hr
Sep 28, 12:48 PM EDTSpecial Weather StatementOKXSuffolk57 min
Sep 28, 12:52 PM EDTAreal Flood AdvisoryOKXSuffolk53 min
Sep 28, 12:58 PM EDTSpecial Marine WarningOKX62 min
Sep 28, 1:58 PM EDTSpecial Marine WarningOKX62 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, 2:18 PM EDTFlash Flood WarningOKXLower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region117 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 New York, 2012Flash 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.