Alert archive / Connecticut / Flash Flood Warnings in 2013

Flash Flood Warning 39, NWS New York, NY

September 2, 2013Southeastern Connecticut Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Sep 2, 2013, 1:24 PM EDT for Southeastern Connecticut Planning Region, Connecticut. It was in force for 96 min. 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: Sep 2, 2013, 1:24 PM EDT (17:24 UTC)
Expired: Sep 2, 2013, 3:00 PM EDT
In force: 96 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Southeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 91 km from the middle of the area, began a volume at 17:26 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

Time	Report	Where	Remark
Sep 2, 1:30 PM EDT	FLASH FLOOD	Midway, CT	SOUTH ROAD AT THE RAILROAD UNDERPASS IS CLOSED BY POLICE DUE TO FLOODING.

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, 5.4 hours before the alert went out and 98 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: 791 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 538 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 75 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.

341 
WGUS51 KOKX 021724
FFWOKX
CTC011-021900-
/O.NEW.KOKX.FF.W.0039.130902T1724Z-130902T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
124 PM EDT MON SEP 2 2013

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 300 PM EDT...

* AT 120 PM EDT...FLASH FLOODING WAS REPORTED FROM A THUNDERSTORM   
OVER THE WARNED AREA. THUNDERSTORMS PRODUCING HEAVY RAIN WILL SLOWLY 
MOVE EAST. HOWEVER...FLASH FLOODING IS LIKELY ACROSS PORTIONS OF 
SOUTHERN AND EASTERN NEW LONDON COUNTY.

LAT...LON 4140 7184 4134 7182 4131 7185 4132 7187
      4133 7188 4132 7190 4133 7194 4130 7198
      4131 7206 4136 7206 4148 7202 4157 7179
      4142 7179

$$

PW

3 follow-up statements

343 
WGUS71 KOKX 021756
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
156 PM EDT MON SEP 2 2013

CTC011-021900-
/O.CON.KOKX.FF.W.0039.000000T0000Z-130902T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW LONDON CT-
156 PM EDT MON SEP 2 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM EDT FOR
SOUTHEASTERN NEW LONDON COUNTY...

DOPPLER RADAR INDICATES WEAKENING SHOWERS OVER THE WARNED AREA. 
HOWEVER...LINGERING FLOODING IS LIKELY...ESPECIALLY IN POOR DRAINAGE 
AREAS. AS SUCH...THE FLASH FLOOD WARNING CONTINUES.

LAT...LON 4140 7184 4134 7182 4131 7185 4132 7187
      4133 7188 4132 7190 4133 7194 4130 7198
      4131 7206 4136 7206 4148 7202 4157 7179
      4142 7179

$$

PW

494 
WGUS71 KOKX 021759
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
159 PM EDT MON SEP 2 2013

CTC011-021900-
/O.CON.KOKX.FF.W.0039.000000T0000Z-130902T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW LONDON CT-
159 PM EDT MON SEP 2 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM EDT FOR
SOUTHEASTERN NEW LONDON COUNTY...

AT 153 PM EDT...DOPPLER RADAR INDICATES AN AREA OF SHOWERS AND 
THUNDERSTORMS MOVING EAST ACROSS EASTERN NEW LONDON COUNTY. 
LINGERING FLOODING IS LIKELY IN POOR DRAINAGE AREAS. AS SUCH...THE 
FLASH FLOOD WARNING CONTINUES.

LAT...LON 4140 7184 4134 7182 4131 7185 4132 7187
      4133 7188 4132 7190 4133 7194 4130 7198
      4131 7206 4136 7206 4148 7202 4157 7179
      4142 7179

$$

PW

636 
WGUS71 KOKX 021856
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
256 PM EDT MON SEP 2 2013

CTC011-021905-
/O.EXP.KOKX.FF.W.0039.000000T0000Z-130902T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW LONDON CT-
256 PM EDT MON SEP 2 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 300 PM EDT FOR SOUTHEASTERN
NEW LONDON COUNTY...

THE AREA OF SHOWERS AND THUNDERSTORMS HAS MOVED TO THE NORTHEAST OF 
THE WARNED AREA. AS SUCH...THE FLASH FLOOD WARNING WILL BE ALLOWED 
TO EXPIRE.

LAT...LON 4140 7184 4134 7182 4131 7185 4132 7187
      4133 7188 4132 7190 4133 7194 4130 7198
      4131 7206 4136 7206 4148 7202 4157 7179
      4142 7179

$$

PW

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 4:06 AM EDT	Areal Flood Advisory	OKX	Southeastern Connecticut Planning Region	54 min
Sep 2, 4:12 AM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	2 hr
Sep 2, 4:39 AM EDT	Flash Flood Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	2 hr
Sep 2, 6:17 AM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region	88 min
Sep 2, 9:24 AM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region	66 min
Sep 2, 12:48 PM EDT	Areal Flood Advisory	OKX	Southeastern Connecticut Planning Region	87 min
Sep 2, 2:08 PM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	82 min
Sep 2, 2:36 PM EDT	Special Weather Statement	OKX		54 min
Sep 2, 3:04 PM EDT	Flash Flood Warning	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	2 hr

Nearby

Flash Flood Warnings in Connecticut, 2013 Every flash flood warning in 2013

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.