Alert archive / Connecticut / Flash Flood Warnings in 2012

Flash Flood Warning 12, NWS New York, NY

July 28, 2012Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Putnam County, Westchester County, New York

NWS New York, NY issued this flash flood warning at Jul 28, 2012, 2:44 PM EDT for Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Putnam County, Westchester County, New York. It was in force for 3 hr. 1 report 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 28, 2012, 2:44 PM EDT (18:44 UTC)
Expired
Jul 28, 2012, 5:45 PM EDT
In force
3 hr
Issued by
NWS New York, NY
Area
Storm-based polygon
Flood severity
None

Counties Greater Bridgeport Planning Region, CT, Naugatuck Valley Planning Region, CT, Putnam County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 65 km from the middle of the area, began a volume at 18:44 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
Jul 28, 3:10 PM EDTFLASH FLOOD1 Wnw Towners, NY2 FT OF WATER ON RTE 311 AT CUSHMAN RD

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, 6.7 hours before the alert went out and 65 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 2012-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 424 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 2012-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.19395878Sfc1 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
424 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
705 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

450 
WGUS51 KOKX 281844
FFWOKX
CTC001-009-NYC079-119-282145-
/O.NEW.KOKX.FF.W.0012.120728T1844Z-120728T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
244 PM EDT SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 545 PM EDT...

* AT 239 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM AN AREA OF THUNDERSTORMS OVER THE WARNED AREA.
RAINFALL RATES OF OVER TWO INCHES PER HOUR ARE EXPECTED WITH THIS 
ACTIVITY...RESULTING IN FLASH FLOODING ACROSS PORTIONS OF THE WARNED 
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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 4164 7294 4156 7294 4158 7275 4142 7275
      4143 7267 4126 7256 4124 7290 4128 7292
      4114 7310 4116 7320 4107 7338 4107 7371
      4149 7377 4153 7354 4162 7349 4150 7344
      4148 7333 4152 7317 4156 7316 4164 7298

$$

PW
2 follow-up statements
400 
WGUS71 KOKX 282044
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
444 PM EDT SAT JUL 28 2012

CTC001-009-NYC079-119-282145-
/O.CON.KOKX.FF.W.0012.000000T0000Z-120728T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PUTNAM NY-WESTCHESTER NY-NEW HAVEN CT-FAIRFIELD CT-
444 PM EDT SAT JUL 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR
FAIRFIELD...NEW HAVEN...WESTCHESTER AND PUTNAM COUNTIES...

AT 441 PM EDT...ADDITIONAL SHOWERS AND EMBEDDED THUNDERSTORMS WILL 
CONTINUE. HOWEVER THE MAIN AREA OF HEAVY RAIN HAS MOVED EAST. 
LINGERING FLOODING CAN STILL BE EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY
AND SOUTHEAST NEW YORK.

&&

LAT...LON 4164 7294 4156 7294 4158 7275 4142 7275
      4143 7267 4126 7256 4124 7290 4128 7292
      4114 7310 4116 7320 4107 7338 4107 7371
      4149 7377 4153 7354 4162 7349 4150 7344
      4148 7333 4152 7317 4156 7316 4164 7298

$$

PW
652 
WGUS71 KOKX 282136
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
536 PM EDT SAT JUL 28 2012

CTC001-009-NYC079-119-282145-
/O.EXP.KOKX.FF.W.0012.000000T0000Z-120728T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PUTNAM NY-WESTCHESTER NY-NEW HAVEN CT-FAIRFIELD CT-
536 PM EDT SAT JUL 28 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 545 PM EDT FOR FAIRFIELD...
NEW HAVEN...WESTCHESTER AND PUTNAM COUNTIES...

SHOWERS PRODUCING LIGHT TO MODERATE RAIN CONTINUE. HOWEVER...THE 
HEAVY RAIN HAS NOW MOVED TO THE EAST OF THE WARNED AREA. AS 
SUCH...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY
AND SOUTHEAST NEW YORK.

LAT...LON 4164 7294 4156 7294 4158 7275 4142 7275
      4143 7267 4126 7256 4124 7290 4128 7292
      4114 7310 4116 7320 4107 7338 4107 7371
      4149 7377 4153 7354 4162 7349 4150 7344
      4148 7333 4152 7317 4156 7316 4164 7298

$$

PW

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 1:25 PM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region95 min
Jul 28, 1:48 PM EDTSpecial Weather StatementOKX57 min
Jul 28, 2:20 PM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region85 min
Jul 28, 3:17 PM EDTAreal Flood AdvisoryOKXGreater Bridgeport Planning Region58 min
Jul 28, 3:41 PM EDTAreal Flood AdvisoryOKXLower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region2 hr
Jul 28, 4:00 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region112 min
Jul 28, 4:34 PM EDTFlash Flood WarningOKXLower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region116 min
Jul 28, 8:41 AM EDTAreal Flood AdvisoryOKXNassau2 hr
Jul 28, 8:43 AM EDTAreal Flood AdvisoryOKXSuffolk2 hr
Jul 28, 8:49 AM EDTAreal Flood AdvisoryOKXSuffolk116 min
Jul 28, 12:16 PM EDTAreal Flood AdvisoryOKXOrange, Putnam59 min
Jul 28, 12:47 PM EDTFlash Flood WarningOKXOrange3 hr
Jul 28, 1:03 PM EDTSpecial Weather StatementOKXOrange42 min
Jul 28, 1:08 PM EDTSevere Thunderstorm WarningOKXOrange37 min
Jul 28, 1:54 PM EDTSpecial Weather StatementOKXOrange, Rockland66 min
Jul 28, 1:58 PM EDTAreal Flood AdvisoryOKXOrange, Putnam, Rockland, Westchester92 min
Jul 28, 2:40 PM EDTFlash Flood WarningOKXOrange, Putnam, Rockland, Westchester3 hr
Jul 28, 2:58 PM EDTSpecial Marine WarningOKX47 min
Jul 28, 5:04 PM EDTAreal Flood AdvisoryOKXNassau, Suffolk116 min
Jul 28, 6:43 PM EDTSpecial Weather StatementOKXOrange62 min

Nearby

Flash Flood Warnings in Connecticut, 2012Flash Flood Warnings in New York, 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.