Alert archive / Connecticut / Flash Flood Warnings in 2022

Flash Flood Warning 21, NWS New York, NY

August 23, 2022Naugatuck Valley Planning Region, Connecticut

NWS New York, NY issued this flash flood warning at Aug 23, 2022, 6:19 PM EDT for Naugatuck Valley Planning Region, Connecticut. It was in force for 85 min. 2 reports 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: Aug 23, 2022, 6:19 PM EDT (22:19 UTC)
Expired: Aug 23, 2022, 7:44 PM EDT
In force: 85 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Naugatuck Valley Planning Region, CT

The radar

The Brookhaven radar (KOKX), 64 km from the middle of the area, began a volume at 22:20 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
Aug 23, 6:20 PM EDT	FLASH FLOOD	1 Wsw Seymour, CT	NORTHBOUND 22 ENTRANCE RAMP TO ROUTE 8 IN SEYMOUR CT IMPASSABLE DUE TO FLOODING.
Aug 23, 7:13 PM EDT	FLASH FLOOD	1 Wsw Seymour, CT	RT8 NORTHBOUND CLOSED BETWEEN EXITS 22 AND 23 BECAUSE WATER OVER THE ROAD.

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, 10.3 hours before the alert went out and 64 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: 651 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 908 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

968 
WGUS51 KOKX 232219
FFWOKX
CTC009-240130-
/O.NEW.KOKX.FF.W.0021.220823T2219Z-220824T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
619 PM EDT Tue Aug 23 2022

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Central New Haven County in southern Connecticut...

* Until 930 PM EDT.

* At 619 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Naugatuck, Hamden, Cheshire, Seymour, Prospect, Woodbridge, Beacon 
  Falls, Bethany and Oxford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4143 7313 4146 7304 4148 7296 4143 7293
      4140 7299 4137 7310

FLASH FLOOD...RADAR INDICATED

$$

JT

1 follow-up statement

716 
WGUS71 KOKX 232344
FFSOKX

Flash Flood Statement
National Weather Service New York NY
744 PM EDT Tue Aug 23 2022

CTC009-232354-
/O.CAN.KOKX.FF.W.0021.000000T0000Z-220824T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Haven CT-
744 PM EDT Tue Aug 23 2022

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL NEW HAVEN COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4143 7313 4146 7304 4148 7296 4143 7293
      4140 7299 4137 7310

$$

JT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 1:10 PM EDT	Special Weather Statement	OKX		50 min
Aug 23, 1:32 PM EDT	Special Weather Statement	OKX		58 min
Aug 23, 3:25 PM EDT	Special Weather Statement	OKX		50 min
Aug 23, 4:20 PM EDT	Areal Flood Advisory	OKX	Naugatuck Valley Planning Region	85 min
Aug 23, 4:22 PM EDT	Special Weather Statement	OKX		38 min
Aug 23, 4:29 PM EDT	Severe Thunderstorm Warning	OKX	Naugatuck Valley Planning Region	61 min
Aug 23, 4:57 PM EDT	Flash Flood Warning	OKX	Naugatuck Valley Planning Region	97 min
Aug 23, 5:19 PM EDT	Special Weather Statement	OKX		41 min
Aug 23, 5:50 PM EDT	Areal Flood Advisory	OKX	Naugatuck Valley Planning Region	115 min
Aug 23, 5:53 PM EDT	Severe Thunderstorm Warning	OKX	Naugatuck Valley Planning Region	49 min
Aug 23, 6:16 PM EDT	Special Weather Statement	OKX		59 min
Aug 23, 7:18 PM EDT	Special Weather Statement	OKX		42 min
Aug 23, 7:51 PM EDT	Special Weather Statement	OKX		39 min

Nearby

Flash Flood Warnings in Connecticut, 2022 Every flash flood warning in 2022

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.