Alert archive / New York / Flash Flood Warnings in 2021
Flash Flood Warning 12, NWS New York, NY
NWS New York, NY issued this flash flood warning at Jul 8, 2021, 5:06 PM EDT for Bergen County, New Jersey; Bronx County, New York County, Westchester County, New York. It was in force for 3 hr. 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
- Jul 8, 2021, 5:06 PM EDT (21:06 UTC)
- Expired
- Jul 8, 2021, 8:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Bergen County, NJ, Bronx County, NY, New York County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 84 km from the middle of the area, began a volume at 21:07 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 8, 5:13 PM EDT | FLASH FLOOD | 2 Ne Riverdale, NY | ROAD CLOSED ON SAW MILL RIVER PARKWAY SOUTHBOUND AT MCLEAN AVE DUE TO FLOODING. |
| Jul 8, 5:55 PM EDT | FLASH FLOOD | 1 Ssw Washington Height, NY | HARLEM RIVER DRIVE SOUTHBOUND IN AREA OF EXIT 23 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, 9.1 hours before the alert went out and 84 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
- 973 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 751 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted.
754
WGUS51 KOKX 082106
FFWOKX
NJC003-NYC005-061-119-090015-
/O.NEW.KOKX.FF.W.0012.210708T2106Z-210709T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
506 PM EDT Thu Jul 8 2021
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Southeastern Bergen County in northeastern New Jersey...
Bronx County in southeastern New York...
New York (Manhattan) County in southeastern New York...
Southern Westchester County in southeastern New York...
* Until 815 PM EDT.
* At 506 PM EDT, the public reported thunderstorms producing heavy
rain across the warned area. Between 2 and 4 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Public reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Yonkers, New Rochelle, Mott Haven, East Tremont, Ridgefield,
Throgs Neck Bridge, Harlem, Riverdale, Co-op City, Fort Lee,
Englewood, Bronxville, City Island, Upper West Side, Mount Vernon,
Eastchester, Cliffside Park, Palisades Park, Mamaroneck and
Tenafly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Excessive runoff from heavy rainfall will cause flooding of urban
areas, highways, streets and underpasses as well as other drainage
areas and low lying spots.
&&
LAT...LON 4082 7402 4090 7398 4098 7391 4096 7369
4092 7372 4090 7374 4088 7374 4084 7375
4082 7379 4080 7377 4081 7382 4080 7386
4079 7388 4080 7391 4079 7391 4077 7394
4078 7400 4080 7398
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
DJ2 follow-up statements
271
WGUS71 KOKX 082315
FFSOKX
Flash Flood Statement
National Weather Service New York NY
715 PM EDT Thu Jul 8 2021
NJC003-NYC005-061-119-090015-
/O.CON.KOKX.FF.W.0012.000000T0000Z-210709T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bergen NJ-Bronx NY-New York (Manhattan) NY-Westchester NY-
715 PM EDT Thu Jul 8 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT THIS
EVENING FOR SOUTHEASTERN BERGEN, BRONX, NEW YORK (MANHATTAN) AND
SOUTHERN WESTCHESTER COUNTIES...
At 715 PM EDT, local law enforcement reported numerous road closures
and water rescues across the warned area. Between 2 and 4 inches of
rain have fallen. A few additional showers are possible through this
evening. Additional flash flooding is not expected.
HAZARD...Flooded and impassable roadways and swollen creeks and
streams.
SOURCE...Law enforcement reported.
IMPACT...Flooded small creeks and streams, urban areas, highways,
streets and underpasses as well as other poor drainage
and low-lying areas.
Some locations that have experienced flash flooding include...
Yonkers, New Rochelle, Mott Haven, East Tremont, Ridgefield,
Throgs Neck Bridge, Harlem, Riverdale, Co-op City, Fort Lee,
Englewood, Bronxville, City Island, Upper West Side, Mount Vernon,
Eastchester, Cliffside Park, Palisades Park, Mamaroneck and
Tenafly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4082 7402 4090 7398 4098 7391 4096 7369
4092 7372 4090 7374 4088 7374 4084 7375
4082 7379 4080 7377 4081 7382 4080 7386
4079 7388 4080 7391 4079 7391 4077 7394
4078 7400 4080 7398
FLASH FLOOD...OBSERVED
$$
DJ656
WGUS71 KOKX 090014
FFSOKX
Flash Flood Statement
National Weather Service New York NY
814 PM EDT Thu Jul 8 2021
NJC003-NYC005-061-119-090024-
/O.EXP.KOKX.FF.W.0012.000000T0000Z-210709T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bergen NJ-Bronx NY-New York (Manhattan) NY-Westchester NY-
814 PM EDT Thu Jul 8 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 815 PM EDT THIS EVENING FOR
SOUTHEASTERN BERGEN, BRONX, NEW YORK (MANHATTAN) AND SOUTHERN
WESTCHESTER COUNTIES...
Flash flooding is no longer expected to pose a threat. Additional
rainfall may be possible. Please continue to heed remaining road
closures.
A Flash Flood Watch remains in effect until 1200 PM EDT Friday for
portions of southern Connecticut, northeast New Jersey and southeast
New York.
LAT...LON 4082 7402 4090 7398 4098 7391 4096 7369
4092 7372 4090 7374 4088 7374 4084 7375
4082 7379 4080 7377 4081 7382 4080 7386
4079 7388 4080 7391 4079 7391 4077 7394
4078 7400 4080 7398
$$
DJThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 12:59 PM EDT | Special Weather Statement | OKX | Passaic | 46 min |
| Jul 8, 1:24 PM EDT | Severe Thunderstorm Warning | OKX | Bergen, Passaic | 51 min |
| Jul 8, 2:11 PM EDT | Severe Thunderstorm Warning | OKX | Bergen, Passaic | 49 min |
| Jul 8, 2:29 PM EDT | Areal Flood Advisory | OKX | Bergen, Passaic | 2 hr |
| Jul 8, 3:08 PM EDT | Special Weather Statement | OKX | Bergen | 37 min |
| Jul 8, 3:15 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Passaic | 3 hr |
| Jul 8, 3:27 PM EDT | Special Weather Statement | OKX | Essex | 48 min |
| Jul 8, 3:53 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson | 3 hr |
| Jul 8, 6:15 PM EDT | Areal Flood Advisory | OKX | Bergen, Essex, Passaic | 3 hr |
| Jul 8, 6:35 PM EDT | Special Weather Statement | OKX | Bergen, Essex, Hudson, Union | 40 min |
| Jul 8, 7:25 PM EDT | River Flood Warning | OKX | Bergen | 12 hr |
| Jul 7, 8:02 PM EDT | Special Weather Statement | OKX | Putnam | 43 min |
| Jul 7, 10:43 PM EDT | Special Weather Statement | OKX | Dutchess | 47 min |
| Jul 7, 11:19 PM EDT | Special Weather Statement | OKX | Orange | 56 min |
| Jul 7, 11:34 PM EDT | Special Weather Statement | OKX | Orange, Putnam | 56 min |
| Jul 7, 11:46 PM EDT | Special Weather Statement | OKX | Orange, Putnam, Rockland, Westchester | 44 min |
| Jul 8, 12:18 AM EDT | Areal Flood Advisory | OKX | Orange | 66 min |
| Jul 8, 12:29 AM EDT | Special Weather Statement | OKX | Putnam, Westchester | 46 min |
| Jul 8, 12:44 AM EDT | Areal Flood Advisory | OKX | Orange, Putnam | 62 min |
| Jul 8, 5:08 AM EDT | Tropical Storm Warning | OKX | Nassau, Suffolk | 33 hr |
| Jul 8, 9:23 AM EDT | Areal Flood Advisory | OKX | Orange | 112 min |
| Jul 8, 11:54 AM EDT | Special Weather Statement | OKX | Orange | 66 min |
| Jul 8, 12:59 PM EDT | Special Weather Statement | OKX | Putnam | 46 min |
| Jul 8, 2:53 PM EDT | Special Marine Warning | OKX | 52 min | |
| Jul 8, 2:58 PM EDT | Special Weather Statement | OKX | Nassau, Queens | 47 min |
| Jul 8, 3:10 PM EDT | Small Craft Advisory | OKX | 23 hr | |
| Jul 8, 3:19 PM EDT | Special Weather Statement | OKX | New York | 41 min |
| Jul 8, 3:49 PM EDT | Special Marine Warning | OKX | 56 min | |
| Jul 8, 4:00 PM EDT | Special Weather Statement | OKX | Nassau | 45 min |
| Jul 8, 4:37 PM EDT | Special Weather Statement | OKX | Bronx, New York | 38 min |
| Jul 8, 4:51 PM EDT | Special Marine Warning | OKX | 24 min | |
| Jul 8, 5:03 PM EDT | Special Weather Statement | OKX | Nassau | 42 min |
| Jul 8, 5:16 PM EDT | Severe Thunderstorm Warning | OKX | Nassau, Suffolk | 44 min |
| Jul 8, 5:38 PM EDT | Areal Flood Advisory | OKX | Nassau, Suffolk | 3 hr |
| Jul 8, 5:59 PM EDT | Special Weather Statement | OKX | Suffolk | 46 min |
| Jul 8, 6:40 PM EDT | Special Weather Statement | OKX | Suffolk | 50 min |
| Jul 8, 6:59 PM EDT | Areal Flood Advisory | OKX | Kings, Nassau, New York, Queens | 90 min |
| Jul 8, 7:17 PM EDT | Special Weather Statement | OKX | Nassau | 43 min |
Nearby
Flash Flood Warnings in New York, 2021Flash Flood Warnings in New Jersey, 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.