Alert archive / Connecticut / Flash Flood Warnings in 2021
Flash Flood Warning 41, NWS New York, NY
NWS New York, NY issued this flash flood warning at Sep 1, 2021, 10:08 PM EDT for Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Nassau County, Westchester County, New York. It was in force for 4 hr. 15 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
- Sep 1, 2021, 10:08 PM EDT (02:08 UTC)
- Expired
- Sep 2, 2021, 2:30 AM EDT
- In force
- 4 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Damage threat
- Catastrophic
- Flood severity
- None
Counties Greater Bridgeport Planning Region, CT, Naugatuck Valley Planning Region, CT, Nassau County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 56 km from the middle of the area, began a volume at 02:10 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 1, 10:12 PM EDT | FLASH FLOOD | Rye, NY | SEVERAL CARS DROVE AROUND BARRICADES AND ARE NOW STUCK IN FLOODWATERS. |
| Sep 1, 10:22 PM EDT | FLASH FLOOD | Port Chester, NY | FLOOD WATERSR UP TO THE HOOD OF CARS ON GLEN AVE AND HASECO AVE IN PORT CHESTER. |
| Sep 1, 10:29 PM EDT | FLASH FLOOD | Manhasset, NY | CAR STUCK IN FLOODWATERS ON NORTHERN BLVD. |
| Sep 1, 10:45 PM EDT | FLASH FLOOD | 1 Ssw Rye, NY | BASEMENT FLOODING IN HOUSE ON THORNE PL IN RYE. |
| Sep 1, 10:45 PM EDT | FLASH FLOOD | 2 W Darien, CT | COVE ROAD AND SEASIDE AVENUE CLOSED DUE TO FLOODING. |
| Sep 1, 11:00 PM EDT | FLASH FLOOD | Stamford, CT | MULTIPLE CARS STRANDED IN FLOOD WATERS WITH RESCUES ONGOING. |
| Sep 1, 11:28 PM EDT | FLASH FLOOD | 1 Ese Jericho, NY | TREE DOWN ON THE NORTHERN STATE PARKWAY WESTBOUND BETWEEN EXIT 27N AND EXIT 26 N. |
| Sep 1, 11:30 PM EDT | FLASH FLOOD | 1 Se Bridgeport, CT | MULTIPLE CARS STRANDED IN FLOOD WATERS ON INTERSTATE 95 NEAR BRIDGEPORT. WATER ABOVE CAR DOORS. |
| Sep 1, 11:30 PM EDT | FLASH FLOOD | Fairfield, CT | FAIRFIELD POLICE IS REPORTING NUMEROUS FLOODED STREETS AND ROAD CLOSURES ACROSS TOWN. |
| Sep 1, 11:44 PM EDT | FLASH FLOOD | Yorktown Heights, NY | ROUTE 202 IS CLOSED NEAR PINE GROVE COURT DUE TO HEAVY FLOODING. |
| Sep 2, 12:07 AM EDT | FLASH FLOOD | 1 Ene West Haven, CT | WEST HAVEN POLICE IS CLOSING CAMPBELL AVENUE IN WEST HAVEN DUE TO FLOODING. |
| Sep 2, 12:30 AM EDT | FLASH FLOOD | New Haven, CT | ENTIRE GROUND FLOOR OF APARTMENT BUILDING FLOODED. |
| Sep 2, 12:40 AM EDT | FLASH FLOOD | 1 N New Haven, CT | MULTIPLE DORMS AT YALE UNIVERSITY HAVE SIGNIFICANT FLOODING INTO THE FIRST FLOORS. |
| Sep 2, 12:40 AM EDT | FLASH FLOOD | 1 N New Haven, CT | SIGNIFICANT FLOODING AT MULTIPLE DORMITORIES WITH FLOODING INTO THE FIRST FLOORS OF SEVERAL BUILDINGS. |
| Sep 2, 2:08 AM EDT | FLASH FLOOD | Meriden, CT | SEVERAL STREETS ARE IMPASSABLE DUE TO SIGNIFICANT FLASH 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 00:00Z, 2.1 hours before the alert went out and 56 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
- 123 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 456 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
442
WGUS51 KOKX 020208
FFWOKX
CTC001-009-NYC059-119-020430-
/O.NEW.KOKX.FF.W.0041.210902T0208Z-210902T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
1008 PM EDT Wed Sep 1 2021
...FLASH FLOOD EMERGENCY FOR NORTHERN NASSAU, NORTHERN WESTCHESTER,
FAIRFIELD AND NEW HAVEN...
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Fairfield County in southern Connecticut...
New Haven County in southern Connecticut...
Northern Nassau County in southeastern New York...
Westchester County in southeastern New York...
* Until 1230 AM EDT.
* At 1008 PM EDT, Doppler radar indicated heavy rain across the
warned area. Between 2 and 3.5 inches of rain have fallen. The
expected rainfall rate is 2 to 5 inches in 1 hour. Flash flooding
is already occurring.
This is a FLASH FLOOD EMERGENCY for Northern Nassau, Northern
Westchester, Fairfield and New Haven. This is a PARTICULARLY
DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Radar.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW! Life threatening flash flooding of
low water crossings, small creeks and streams, urban
areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Bridgeport, New Haven, Stamford, Waterbury, Norwalk, Danbury,
Meriden, Milford, Middletown, Wallingford, Shelton, Naugatuck,
Port Chester, Glen Cove, Plainview, Peekskill, Guilford,
Southbury, New Canaan and Syosset.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now! This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
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 4132 7398 4137 7354 4167 7352 4149 7344
4147 7332 4164 7294 4156 7295 4158 7275
4142 7275 4143 7265 4126 7252 4124 7291
4125 7291 4098 7365 4092 7364 4092 7350
4077 7344 4073 7371 4081 7377 4091 7365
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
EXPECTED RAINFALL...2-5 INCHES IN 1 HOUR
$$
Fig2 follow-up statements
792
WGUS51 KOKX 020403
FFWOKX
CTC001-009-NYC059-119-020630-
/O.EXT.KOKX.FF.W.0041.000000T0000Z-210902T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
1203 AM EDT Thu Sep 2 2021
...FLASH FLOOD EMERGENCY FOR NORTHERN NASSAU, NORTHERN WESTCHESTER,
FAIRFIELD AND NEW HAVEN...
The National Weather Service in Upton has extended the
* Flash Flood Warning for...
Fairfield County in southern Connecticut...
New Haven County in southern Connecticut...
Northern Nassau County in southeastern New York...
Westchester County in southeastern New York...
* Until 230 AM EDT.
* At 1203 AM EDT, Doppler radar indicated heavy rain across the
warned area. Between 2 and 3.5 inches of rain have fallen. The
expected rainfall rate is 2 to 5 inches in 1 hour. Flash flooding
is already occurring.
This is a FLASH FLOOD EMERGENCY for Northern Nassau, Northern
Westchester, Fairfield and New Haven. This is a PARTICULARLY
DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Radar.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW! Life threatening flash flooding of
low water crossings, small creeks and streams, urban
areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Bridgeport, New Haven, Stamford, Waterbury, Norwalk, Danbury,
Meriden, Milford, Middletown, Wallingford, Shelton, Naugatuck,
Port Chester, Glen Cove, Plainview, Peekskill, Guilford,
Southbury, New Canaan and Syosset.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now! This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
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 4132 7398 4137 7354 4167 7352 4149 7344
4147 7332 4164 7294 4156 7295 4158 7275
4142 7275 4143 7265 4126 7252 4124 7291
4125 7291 4098 7365 4092 7364 4092 7350
4077 7344 4073 7371 4081 7377 4091 7365
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
EXPECTED RAINFALL...2-5 INCHES IN 1 HOUR
$$
Fig394
WGUS71 KOKX 020634
FFSOKX
Flash Flood Statement
National Weather Service New York NY
234 AM EDT Thu Sep 2 2021
CTC001-009-NYC059-119-020644-
/O.EXP.KOKX.FF.W.0041.000000T0000Z-210902T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-New Haven CT-Nassau NY-Westchester NY-
234 AM EDT Thu Sep 2 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR FAIRFIELD, NEW HAVEN,
NORTHERN NASSAU AND WESTCHESTER COUNTIES...
The heavy rain has ended. There is lingering light to moderate rain.
There is now an areal flood warning to replace the expired flash
flood warning to address areas of residual flooding which are
expected to persist into early this morning. Please continue to heed
remaining road closures.
A Flash Flood Watch remains in effect until 200 PM EDT Thursday for
portions of southern Connecticut, northeast New Jersey and southeast
New York.
LAT...LON 4132 7398 4137 7354 4167 7352 4149 7344
4147 7332 4164 7294 4156 7295 4158 7275
4142 7275 4143 7265 4126 7252 4124 7291
4125 7291 4098 7365 4092 7364 4092 7350
4077 7344 4073 7371 4081 7377 4091 7365
$$
JMThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 9:25 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 65 min |
| Sep 1, 10:20 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 55 min |
| Sep 1, 11:11 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 64 min |
| Sep 2, 12:06 AM EDT | Flash Flood Warning | OKX | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 5 hr |
| Sep 2, 12:13 AM EDT | Severe Thunderstorm Warning | OKX | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 92 min |
| Sep 2, 12:53 AM EDT | River Flood Warning | OKX | Naugatuck Valley Planning Region | 5 hr |
| Sep 2, 1:06 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region | 4 hr |
| Sep 2, 1:15 AM EDT | River Flood Warning | OKX | Southeastern Connecticut Planning Region | 21 hr |
| Sep 2, 1:19 AM EDT | River Flood Warning | OKX | Southeastern Connecticut Planning Region | 8 hr |
| Sep 2, 2:30 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region | 8 hr |
| Sep 2, 5:01 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region | 3 hr |
| Sep 2, 5:23 AM EDT | Areal Flood Warning | OKX | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 19 hr |
| Sep 2, 10:07 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 15 hr |
| Sep 1, 8:32 PM EDT | Severe Thunderstorm Warning | OKX | New York, Richmond | 43 min |
| Sep 1, 9:03 PM EDT | Severe Thunderstorm Warning | OKX | Bronx, Kings, Nassau, New York, Queens, Westchester | 42 min |
| Sep 1, 9:06 PM EDT | Tornado Warning | OKX | Bronx, New York, Westchester | 24 min |
| Sep 1, 9:15 PM EDT | Special Marine Warning | OKX | 60 min | |
| Sep 1, 9:25 PM EDT | Special Marine Warning | OKX | 65 min | |
| Sep 1, 9:28 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Westchester | 2 hr |
| Sep 1, 9:34 PM EDT | Special Marine Warning | OKX | 12 min | |
| Sep 1, 9:56 PM EDT | Special Marine Warning | OKX | 34 min | |
| Sep 1, 9:57 PM EDT | Severe Thunderstorm Warning | OKX | Kings, Nassau, Queens | 48 min |
| Sep 1, 10:09 PM EDT | Special Marine Warning | OKX | 96 min | |
| Sep 1, 10:12 PM EDT | Special Marine Warning | OKX | 20 min | |
| Sep 1, 10:26 PM EDT | Special Marine Warning | OKX | 64 min | |
| Sep 1, 10:30 PM EDT | Severe Thunderstorm Warning | OKX | Nassau, Suffolk | 45 min |
| Sep 1, 10:39 PM EDT | Tornado Warning | OKX | Suffolk | 36 min |
| Sep 1, 10:44 PM EDT | Severe Thunderstorm Warning | OKX | Nassau | 46 min |
| Sep 1, 10:47 PM EDT | Special Marine Warning | OKX | 118 min | |
| Sep 1, 10:55 PM EDT | Special Marine Warning | OKX | 45 min | |
| Sep 1, 11:13 PM EDT | Flash Flood Warning | OKX | Suffolk | 6 hr |
| Sep 1, 11:19 PM EDT | Special Marine Warning | OKX | 86 min | |
| Sep 1, 11:54 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Richmond, Westchester | 3 hr |
| Sep 2, 12:25 AM EDT | Flash Flood Warning | OKX | Nassau, Queens, Suffolk | 4 hr |
| Sep 2, 12:28 AM EDT | Special Marine Warning | OKX | 92 min | |
| Sep 2, 12:48 AM EDT | River Flood Warning | OKX | Orange, Ulster | 12 hr |
| Sep 2, 1:50 AM EDT | Special Weather Statement | OKX | Suffolk | 40 min |
| Sep 2, 1:57 AM EDT | Special Marine Warning | OKX | 80 min | |
| Sep 2, 2:53 AM EDT | Areal Flood Warning | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more | 7 hr |
| Sep 2, 3:50 AM EDT | Rip Current Statement | OKX | Kings, Nassau, Queens, Suffolk | 16 hr |
| Sep 2, 4:38 AM EDT | Areal Flood Advisory | OKX | Nassau, Queens, Suffolk | 3 hr |
| Sep 2, 4:55 AM EDT | Areal Flood Advisory | OKX | Suffolk | 3 hr |
| Sep 2, 7:49 AM EDT | Areal Flood Advisory | OKX | Orange, Putnam, Rockland, Westchester | 10 hr |
| Sep 2, 10:16 AM EDT | Areal Flood Warning | OKX | Bronx, Nassau, Rockland, Westchester | 25 hr |
| Sep 2, 10:59 AM EDT | Small Craft Advisory | OKX | 19 hr |
Nearby
Flash Flood Warnings in Connecticut, 2021Flash Flood Warnings in New York, 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.