Alert archive / Connecticut / Flash Flood Warnings in 2012

Flash Flood Warning 15, NWS New York, NY

July 28, 2012Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Jul 28, 2012, 4:34 PM EDT for Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region, Connecticut. It was in force for 116 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2012, 4:34 PM EDT (20:34 UTC)
Expired: Jul 28, 2012, 6:30 PM EDT
In force: 116 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Lower Connecticut River Valley Planning Region, CT, Southeastern Connecticut Planning Region, CT

The radar

The Brookhaven radar (KOKX), 84 km from the middle of the area, began a volume at 20:36 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.6 hours before the alert went out and 84 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: 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.

433 
WGUS51 KOKX 282034
FFWOKX
CTC007-011-282230-
/O.NEW.KOKX.FF.W.0015.120728T2034Z-120728T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 630 PM EDT...

* AT 428 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  AN AREA OF THUNDERSTORMS ALONG A LINE EXTENDING FROM LEBANON TO
  COLCHESTER TO 10 MILES SOUTHWEST OF CLINTON...MOVING EAST AT 20
  MPH. RAINFALL RATES OF OVER TWO INCHES PER HOUR IS EXPECTED WITH
  THIS ACTIVITY. AS SUCH..FLASH FLOODING IS EXPECTED LOCALLY.

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 4142 7179 4140 7184 4134 7182 4131 7185
      4133 7194 4129 7214 4132 7219 4128 7220
      4125 7251 4133 7261 4144 7265 4142 7275
      4158 7275 4163 7271 4165 7251 4159 7246
      4160 7234 4172 7225 4167 7217 4164 7178

$$

PW

1 follow-up statement

096 
WGUS71 KOKX 282227
FFSOKX

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

CTC007-011-282236-
/O.EXP.KOKX.FF.W.0015.000000T0000Z-120728T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW LONDON CT-MIDDLESEX CT-
627 PM EDT SAT JUL 28 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM EDT FOR MIDDLESEX
AND NEW LONDON COUNTIES...

THE HEAVIER SHOWERS AND THUNDERSTORMS HAVE MOVED TO THE EAST OF THE 
WARNED AREA. SHOWERS WILL CONTINUE...BUT NO ADDITIONAL FLASH 
FLOODING IS ANTICIPATED AT THIS TIME.

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 4142 7179 4140 7184 4134 7182 4131 7185
      4133 7194 4129 7214 4132 7219 4128 7220
      4125 7251 4133 7261 4144 7265 4142 7275
      4158 7275 4163 7271 4165 7251 4159 7246
      4160 7234 4172 7225 4167 7217 4164 7178

$$

PW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 1:25 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region	95 min
Jul 28, 1:48 PM EDT	Special Weather Statement	OKX		57 min
Jul 28, 2:20 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	85 min
Jul 28, 2:44 PM EDT	Flash Flood Warning	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	3 hr
Jul 28, 3:17 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region	58 min
Jul 28, 3:41 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	2 hr
Jul 28, 4:00 PM EDT	Flash Flood Warning	OKX	Greater Bridgeport Planning Region	112 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.