Alert archive / Connecticut / Flash Flood Warnings in 2021
Flash Flood Warning 20, NWS New York, NY
NWS New York, NY issued this flash flood warning at Jul 29, 2021, 5:25 PM EDT for Greater Bridgeport 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
- Jul 29, 2021, 5:25 PM EDT (21:25 UTC)
- Expired
- Jul 29, 2021, 7:30 PM EDT
- In force
- 2 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
The radar
The Brookhaven radar (KOKX), 51 km from the middle of the area, began a volume at 21:28 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 |
|---|---|---|---|
| Jul 29, 6:00 PM EDT | FLASH FLOOD | 2 Nnw Bridgeport, CT | FERN STREET CLOSED 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, 9.4 hours before the alert went out and 51 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.
- Mixed-layer CAPE
- 54 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 823 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
745
WGUS51 KOKX 292125
FFWOKX
CTC001-292330-
/O.NEW.KOKX.FF.W.0020.210729T2125Z-210729T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
525 PM EDT Thu Jul 29 2021
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Southern Fairfield County in southern Connecticut...
* Until 730 PM EDT.
* At 525 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 1.5 inches of
rain have fallen. Additional rainfall amounts up to 1 inch 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...
Bridgeport, Norwalk, New Canaan, Fairfield, Stratford, Trumbull,
Westport, Darien, Wilton, Weston and Easton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4108 7347 4115 7347 4118 7339 4127 7320
4125 7315 4120 7316 4115 7323 4110 7341
FLASH FLOOD...RADAR INDICATED
$$2 follow-up statements
590
WGUS71 KOKX 292207
FFSOKX
Flash Flood Statement
National Weather Service New York NY
607 PM EDT Thu Jul 29 2021
CTC001-292330-
/O.CON.KOKX.FF.W.0020.000000T0000Z-210729T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-
607 PM EDT Thu Jul 29 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT THIS
EVENING FOR SOUTHERN FAIRFIELD COUNTY...
At 607 PM EDT, The heaviest rain has moved out of the area, with
light rain continuing. Flash flooding remains likely in the warned
area. Between 1 and 1.5 inches of rain have fallen. Additional
rainfall of 0.5 to 1 inch remains possible in the warned area.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Bridgeport, Norwalk, New Canaan, Fairfield, Stratford, Trumbull,
Westport, Darien, Wilton, Weston and Easton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4108 7347 4115 7347 4118 7339 4127 7320
4125 7315 4120 7316 4115 7323 4110 7341
FLASH FLOOD...RADAR INDICATED
$$094
WGUS71 KOKX 292335
FFSOKX
Flash Flood Statement
National Weather Service New York NY
735 PM EDT Thu Jul 29 2021
CTC001-292345-
/O.EXP.KOKX.FF.W.0020.000000T0000Z-210729T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-
735 PM EDT Thu Jul 29 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHERN FAIRFIELD COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 4108 7347 4115 7347 4118 7339 4127 7320
4125 7315 4120 7316 4115 7323 4110 7341
$$
METThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 3:46 PM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region | 59 min |
| Jul 29, 4:04 PM EDT | Special Weather Statement | OKX | 41 min | |
| Jul 29, 5:10 PM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region | 15 min |
| Jul 29, 6:52 PM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 113 min |
Nearby
Flash Flood Warnings in Connecticut, 2021Every flash flood warning in 2021
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.