Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 22, NWS New York, NY
NWS New York, NY issued this flash flood warning at Aug 21, 2021, 8:46 PM EDT for Kings County, Queens County, New York. It was in force for 5 hr. 7 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 21, 2021, 8:46 PM EDT (00:46 UTC)
- Expired
- Aug 22, 2021, 2:15 AM EDT
- In force
- 5 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kings County, NY, Queens County, NY
The radar
The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 00:49 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 21, 10:00 PM EDT | FLASH FLOOD | 2 Nne Bay Ridge, NY | WATER RESCUE ON 3RD AVE BENEATH GOWANUS EXPRESSWAY DUE TO FLASH FLOODING. |
| Aug 21, 10:00 PM EDT | FLASH FLOOD | 2 W Crown Heights, NY | WATER RESCUE AT INTERSECTION OF 4TH AVE AND CARROLL STREET DUE TO FLASH FLOODING. |
| Aug 21, 10:06 PM EDT | FLASH FLOOD | 2 W Crown Heights, NY | VEHICLES STRANDED DUE TO FLASH FLOODING ON 4TH AVE IN PARK SLOPE. |
| Aug 21, 10:21 PM EDT | FLASH FLOOD | 2 S Battery Park, NY | FLOODING ON BROOKLYN BATTERY TUNNEL NORTHBOUND BROOKLYN SIDE. ALL LANES CLOSED AND CLINTON STREET ENTRANCE IS CLOSED. |
| Aug 21, 11:29 PM EDT | FLASH FLOOD | 2 W Kennedy Airport, NY | FLOODING ON I-678 NORTHBOUND EXIT - FEDERAL CIRLE; RAMP. ALL LANES CLOSED. |
| Aug 22, 1:01 AM EDT | FLASH FLOOD | 2 Sse Battery Park, NY | ALL LANES OF THE BROOKLYN QUEENS EXPRESSWAY ARE NOW CLOSED IN BOTH DIRECTIONS AT KANE STREET. |
| Aug 22, 1:39 AM EDT | FLASH FLOOD | 2 Sse Battery Park, NY | DUE TO FLOODED ROADWAYS, ALL LANES OF THE BROOKLYN QUEENS EXPRESSWAY ARE CLOSED IN BOTH DIRECTIONS AT KANE STREET IN BROOKLYN. |
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, 0.8 hours before the alert went out and 90 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
- 1163 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 543 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.7
The text
As transmitted.
790
WGUS51 KOKX 220046
FFWOKX
NYC047-081-220345-
/O.NEW.KOKX.FF.W.0022.210822T0046Z-210822T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
846 PM EDT Sat Aug 21 2021
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Kings (Brooklyn) County in southeastern New York...
Queens County in southeastern New York...
* Until 1145 PM EDT.
* At 846 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is already occurring.
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...
Jamaica, Flatbush, Coney Island, Rockaway Beach, Crown Heights,
Kennedy Airport, Forest Hills, Canarsie, Bay Ridge, Howard Beach,
Ozone Park, Brooklyn Heights, Sheepshead Bay, Park Slope,
Bensonhurst and Greenpoint.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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.
&&
LAT...LON 4069 7401 4074 7393 4074 7385 4069 7373
4065 7373 4063 7377 4059 7374 4059 7372
4058 7373 4054 7394 4055 7396 4056 7395
4057 7402 4058 7401 4061 7404
FLASH FLOOD...RADAR INDICATED
$$
MW5 follow-up statements
695
WGUS71 KOKX 220156
FFSOKX
Flash Flood Statement
National Weather Service New York NY
956 PM EDT Sat Aug 21 2021
NYC047-081-220345-
/O.CON.KOKX.FF.W.0022.000000T0000Z-210822T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kings (Brooklyn) NY-Queens NY-
956 PM EDT Sat Aug 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT THIS
EVENING FOR KINGS (BROOKLYN) AND QUEENS COUNTIES...
At 956 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1.5 and 3 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches are possible in
the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Jamaica, Flatbush, Coney Island, Rockaway Beach, Crown Heights,
Kennedy Airport, Forest Hills, Canarsie, Bay Ridge, Howard Beach,
Ozone Park, Brooklyn Heights, Sheepshead Bay, Park Slope,
Bensonhurst and Greenpoint.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4069 7401 4074 7393 4074 7385 4069 7373
4065 7373 4063 7377 4059 7374 4059 7372
4058 7373 4054 7394 4055 7396 4056 7395
4057 7402 4058 7401 4061 7404
FLASH FLOOD...RADAR INDICATED
$$
MW557
WGUS71 KOKX 220255
FFSOKX
Flash Flood Statement
National Weather Service New York NY
1055 PM EDT Sat Aug 21 2021
NYC047-081-220345-
/O.CON.KOKX.FF.W.0022.000000T0000Z-210822T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kings (Brooklyn) NY-Queens NY-
1055 PM EDT Sat Aug 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT THIS
EVENING FOR KINGS (BROOKLYN) AND QUEENS COUNTIES...
At 1055 PM EDT, emergency management reported flash flooding from
thunderstorms producing heavy rain across the warned area. Between
1.5 and 3 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible in the warned area. Flash flooding is
already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported water rescues near 3rd Ave
and Gowanus Expressway and near 4th Ave and Carroll
Street.
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...
Jamaica, Flatbush, Coney Island, Rockaway Beach, Crown Heights,
Kennedy Airport, Forest Hills, Canarsie, Bay Ridge, Howard Beach,
Ozone Park, Brooklyn Heights, Sheepshead Bay, Park Slope,
Bensonhurst and Greenpoint.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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.
&&
LAT...LON 4069 7401 4074 7393 4074 7385 4069 7373
4065 7373 4063 7377 4059 7374 4059 7372
4058 7373 4054 7394 4055 7396 4056 7395
4057 7402 4058 7401 4061 7404
FLASH FLOOD...OBSERVED
$$
MW640
WGUS51 KOKX 220332
FFWOKX
NYC047-081-220515-
/O.EXT.KOKX.FF.W.0022.000000T0000Z-210822T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
1132 PM EDT Sat Aug 21 2021
The National Weather Service in Upton has extended the
* Flash Flood Warning for...
Kings (Brooklyn) County in southeastern New York...
Queens County in southeastern New York...
* Until 115 AM EDT.
* At 1132 PM EDT, emergency management reported thunderstorms
producing heavy rain across the warned area. Between 2 and 3
inches of rain have fallen. Additional rainfall amounts of 1 to 3
inches are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Emergency management reported water rescues near 3rd
Ave and Gowanus Expressway and near 4th Ave and
Carroll Street.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Jamaica, Flatbush, Coney Island, Rockaway Beach, Crown Heights,
Kennedy Airport, Forest Hills, Canarsie, Bay Ridge, Howard Beach,
Ozone Park, Brooklyn Heights, Sheepshead Bay, Park Slope,
Bensonhurst and Greenpoint.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4069 7401 4074 7393 4074 7385 4069 7373
4065 7373 4063 7377 4059 7374 4059 7372
4058 7373 4054 7394 4055 7396 4056 7395
4057 7402 4058 7401 4061 7404
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW774
WGUS51 KOKX 220510
FFWOKX
NYC047-081-220615-
/O.EXT.KOKX.FF.W.0022.000000T0000Z-210822T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
110 AM EDT Sun Aug 22 2021
The National Weather Service in Upton has extended the
* Flash Flood Warning for...
Kings (Brooklyn) County in southeastern New York...
Queens County in southeastern New York...
* Until 215 AM EDT.
* At 110 AM EDT, emergency management reported thunderstorms
producing heavy rain across the warned area. Between 3 and 5
inches of rain have fallen. Additional rainfall amounts of 1 to 2
inches are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Emergency management reported water rescues near 3rd
Ave and Gowanus Expressway and near 4th Ave and
Carroll Street.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Flatbush, Coney Island, Rockaway Beach, Crown Heights, Canarsie,
Bay Ridge, Sheepshead Bay, Bensonhurst and Park Slope.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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.
&&
LAT...LON 4069 7401 4063 7377 4061 7377 4061 7375
4059 7374 4058 7375 4059 7373 4059 7372
4057 7375 4054 7394 4055 7396 4056 7395
4057 7402 4058 7401 4061 7404
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MW648
WGUS71 KOKX 220611
FFSOKX
Flash Flood Statement
National Weather Service New York NY
211 AM EDT Sun Aug 22 2021
NYC047-081-220621-
/O.EXP.KOKX.FF.W.0022.000000T0000Z-210822T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kings (Brooklyn) NY-Queens NY-
211 AM EDT Sun Aug 22 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 215 AM EDT EARLY THIS MORNING
FOR KINGS (BROOKLYN) AND QUEENS COUNTIES...
The heavy rain has ended. Flooding rainfall is no longer expected to
pose a threat. Please continue to heed remaining road closures.
A Flood Watch remains in effect until 800 AM EDT Monday for portions
of southern Connecticut, northeast New Jersey and southeast New York.
LAT...LON 4069 7401 4063 7377 4061 7377 4061 7375
4059 7374 4058 7375 4059 7373 4059 7372
4057 7375 4054 7394 4055 7396 4056 7395
4057 7402 4058 7401 4061 7404
$$
MWThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 9:03 PM EDT | Areal Flood Advisory | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more | 87 min |
| Aug 21, 10:18 PM EDT | Flash Flood Warning | OKX | New York | 4 hr |
| Aug 21, 10:37 PM EDT | Areal Flood Advisory | OKX | Bronx, Nassau, New York, Queens, Westchester | 83 min |
| Aug 21, 10:47 PM EDT | Flash Flood Warning | OKX | Bronx, Nassau, New York, Queens | 103 min |
| Aug 22, 1:22 AM EDT | Flash Flood Warning | OKX | Richmond | 117 min |
| Aug 22, 2:49 AM EDT | Areal Flood Advisory | OKX | Bronx, Kings, Nassau, New York, Queens | 86 min |
| Aug 22, 8:39 AM EDT | Areal Flood Advisory | OKX | Suffolk | 4 hr |
| Aug 22, 1:32 PM EDT | Areal Flood Advisory | OKX | Kings, Nassau, Queens | 118 min |
| Aug 22, 2:44 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Richmond, Rockland and 1 more | 3 hr |
| Aug 22, 3:17 PM EDT | Flash Flood Warning | OKX | Kings, Nassau, Queens | 2 hr |
| Aug 22, 4:32 PM EDT | Coastal Flood Statement | OKX | Nassau, Queens, Suffolk, Westchester | 10 hr |
| Aug 22, 4:51 PM EDT | Flash Flood Warning | OKX | Bronx, New York, Orange, Rockland, Westchester | 6 hr |
| Aug 22, 5:17 PM EDT | Small Craft Advisory | OKX | 42 hr |
Nearby
Flash 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.