Alert archive / Connecticut / Flash Flood Warnings in 2011

Flash Flood Warning 8, NWS New York, NY

June 23, 2011Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Jun 23, 2011, 2:05 PM EDT for Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Connecticut. It was in force for 2 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: Jun 23, 2011, 2:05 PM EDT (18:05 UTC)
Expired: Jun 23, 2011, 4:30 PM EDT
In force: 2 hr
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), 63 km from the middle of the area, began a volume at 18:05 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
Jun 23, 2:15 PM EDT	FLASH FLOOD	West Haven, CT	AREAS OF CAMPBELL AVE BETWEEN NEW STREET AND CAPTAIN THOMAS BLVD CLOSED DUE TO APPROXIMATELY 6 INCHES OF FLOWING WATER OVER THE ROAD. MULTIPLE CARS STUCK.

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, 6.1 hours before the alert went out and 63 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: 414 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 59 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.

003 
WGUS51 KOKX 231805
FFWOKX
CTC007-009-232000-
/O.NEW.KOKX.FF.W.0008.110623T1805Z-110623T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
205 PM EDT THU JUN 23 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 400 PM EDT...

* AT 203 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM NORTH
  BRANDFORD TO GUILFORD TO 13 MILES SOUTH OF BRANFORD...OR ALONG A
  LINE EXTENDING FROM 7 MILES SOUTHEAST OF WALLINGFORD TO GUILFORD TO
  10 MILES NORTH OF WADING RIVER...MOVING EAST AT 25 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4153 7243 4153 7232 4145 7231 4142 7243
      4134 7235 4126 7235 4124 7268 4126 7276
      4123 7287 4128 7291 4129 7291 4120 7301
      4119 7308 4161 7305 4163 7293 4157 7294
      4156 7286 4163 7271 4165 7251

$$

MALOIT

3 follow-up statements

208 
WGUS71 KOKX 231917
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
317 PM EDT THU JUN 23 2011

CTC007-009-232000-
/O.CON.KOKX.FF.W.0008.000000T0000Z-110623T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIDDLESEX CT-NEW HAVEN CT-
317 PM EDT THU JUN 23 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR NEW
HAVEN AND MIDDLESEX COUNTIES...

AT 312 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING. ADDITIONAL RAINFALL 
RATES OF UP TO TWO INCHES AN HOUR ARE POSSIBLE IN THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4153 7243 4153 7232 4145 7231 4142 7243
      4134 7235 4126 7235 4124 7268 4126 7276
      4123 7287 4128 7291 4129 7291 4120 7301
      4119 7308 4161 7305 4163 7293 4157 7294
      4156 7286 4163 7271 4165 7251

$$

MALOIT

822 
WGUS51 KOKX 231940
FFWOKX
CTC007-009-232030-
/O.EXT.KOKX.FF.W.0008.000000T0000Z-110623T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
340 PM EDT THU JUN 23 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS EXTENDED THE

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

* UNTIL 430 PM EDT...

* AT 338 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR             
  INDICATED THAT ADDITIONAL LOCALLY HEAVY RAINFALL WAS MOVING INTO   
  THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL RATES OF UP TO ONE AND ONE HALF INCHES AN HOUR 
ARE POSSIBLE IN THE WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4153 7243 4153 7232 4145 7231 4142 7243
      4134 7235 4126 7235 4124 7268 4126 7276
      4123 7287 4128 7291 4129 7291 4120 7301
      4119 7308 4161 7305 4163 7293 4157 7294
      4156 7286 4163 7271 4165 7251

$$

MALOIT

531 
WGUS71 KOKX 232027
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
427 PM EDT THU JUN 23 2011

CTC007-009-232036-
/O.EXP.KOKX.FF.W.0008.000000T0000Z-110623T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MIDDLESEX CT-NEW HAVEN CT-
427 PM EDT THU JUN 23 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 430 PM EDT FOR NEW HAVEN
AND MIDDLESEX COUNTIES...

HEAVY RAIN HAS MOVED EAST OF THE AREA...AND NO ADDITIONAL HEAVY RAIN 
IS EXPECTED. 

LAT...LON 4153 7243 4153 7232 4145 7231 4142 7243
      4134 7235 4126 7235 4124 7268 4126 7276
      4123 7287 4128 7291 4129 7291 4120 7301
      4119 7308 4161 7305 4163 7293 4157 7294
      4156 7286 4163 7271 4165 7251

$$

GOODMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 11:59 AM EDT	Severe Thunderstorm Warning	OKX	Greater Bridgeport Planning Region	46 min
Jun 23, 12:16 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region	59 min
Jun 23, 12:23 PM EDT	Flash Flood Warning	OKX	Greater Bridgeport Planning Region	4 hr
Jun 23, 12:56 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	64 min
Jun 23, 2:29 PM EDT	Flash Flood Warning	OKX	Southeastern Connecticut Planning Region	3 hr

Nearby

Flash Flood Warnings in Connecticut, 2011 Every flash flood warning in 2011

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.