Alert archive / Connecticut / Flash Flood Warnings in 2011

Flash Flood Warning 9, NWS New York, NY

June 23, 2011Southeastern Connecticut Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Jun 23, 2011, 2:29 PM EDT for Southeastern Connecticut Planning Region, Connecticut. 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: Jun 23, 2011, 2:29 PM EDT (18:29 UTC)
Expired: Jun 23, 2011, 5:30 PM EDT
In force: 3 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Southeastern Connecticut Planning Region, CT

The radar

The Brookhaven radar (KOKX), 82 km from the middle of the area, began a volume at 18:30 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, 2:36 PM EDT	FLASH FLOOD	Lyme Station, CT	NORTH BRIDGE BROOK ROAD CLOSED DUE TO FLOODING... FOUR FEET OF WATER ON ROADWAY IN EAST LYME.

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, 6.5 hours before the alert went out and 82 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.

774 
WGUS51 KOKX 231829
FFWOKX
CTC011-232130-
/O.NEW.KOKX.FF.W.0009.110623T1829Z-110623T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 530 PM EDT...

* AT 227 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM 6
  MILES WEST OF NORTH LYME TO OLD LYME TO 21 MILES SOUTH OF OLD
  LYME...OR ALONG A LINE EXTENDING FROM CHESTER TO OLD SAYBROOK TO
  SOUTHOLD...MOVING NORTHEAST AT 35 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 4133 7184 4133 7193 4134 7198 4131 7201
      4131 7205 4133 7209 4130 7212 4131 7219
      4127 7233 4134 7235 4135 7238 4138 7238
      4139 7241 4142 7243 4144 7230 4154 7233
      4164 7180

$$

MALOIT

1 follow-up statement

373 
WGUS71 KOKX 232131
FFSOKX

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

CTC011-232140-
/O.EXP.KOKX.FF.W.0009.000000T0000Z-110623T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW LONDON CT-
531 PM EDT THU JUN 23 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NEW LONDON COUNTY...

LAT...LON 4133 7184 4133 7193 4134 7198 4131 7201
      4131 7205 4133 7209 4130 7212 4131 7219
      4127 7233 4134 7235 4135 7238 4138 7238
      4139 7241 4142 7243 4144 7230 4154 7233
      4164 7180

$$

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, 2:05 PM EDT	Flash Flood Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region	2 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.