Alert archive / New Jersey / Flash Flood Warnings in 2021
Flash Flood Warning 10, NWS New York, NY
NWS New York, NY issued this flash flood warning at Jul 8, 2021, 3:15 PM EDT for Rockland County, Westchester County, New York; Bergen County, Essex County, Passaic County, New Jersey; Greater Bridgeport Planning Region, Connecticut. It was in force for 3 hr. 5 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, 3:15 PM EDT (19:15 UTC)
- Expired
- Jul 8, 2021, 6:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Greater Bridgeport Planning Region, CT, Bergen County, NJ, Essex County, NJ, Passaic County, NJ, Rockland County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 106 km from the middle of the area, began a volume at 19:15 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, 4:06 PM EDT | FLASH FLOOD | 2 Ssw Greenville, NY | CENTRAL PARK AVE IMPASSABLE DUE TO FLOODING. WATER UP TO CAR DOOR. |
| Jul 8, 4:21 PM EDT | FLASH FLOOD | 1 Ene Ardsley, NY | ALL LANES BLOCKED BOTH DIRECTIONS ON SPRAIN BROOK PARKWAY. |
| Jul 8, 4:30 PM EDT | FLASH FLOOD | Hackensack, NJ | HEAVY FLOODING. CARS STUCK ON ROADS AND MULTIPLE RESCUES ARE ONGOING. |
| 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, 5:15 PM EDT | FLASH FLOOD | 1 Nnw Teterboro Airport, NJ | FLOODING ON NJ 17 NORTHBOUND NORTH OF US 46. ALL LANES CLOSED. |
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, 7.3 hours before the alert went out and 106 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.
827
WGUS51 KOKX 081915
FFWOKX
CTC001-NJC003-013-031-NYC087-119-082215-
/O.NEW.KOKX.FF.W.0010.210708T1915Z-210708T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
315 PM EDT Thu Jul 8 2021
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Southern Fairfield County in southern Connecticut...
Bergen County in northeastern New Jersey...
Northeastern Essex County in northeastern New Jersey...
Eastern Passaic County in northeastern New Jersey...
Rockland County in southeastern New York...
Southern Westchester County in southeastern New York...
* Until 615 PM EDT.
* At 315 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. The expected rainfall rate is 1.5 inches in 3
hours. 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...
Yonkers, Paterson, Stamford, Passaic, White Plains, Wayne,
Bloomfield, Hackensack, Port Chester, Bergenfield, Paramus,
Ridgewood, Lyndhurst, Rutherford, Nanuet, Tarrytown, Dobbs Ferry,
Nyack, Tappan and Greenwich.
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 4097 7428 4113 7402 4118 7362 4107 7349
4090 7387 4092 7392 4087 7394 4078 7414
4079 7415 4077 7415 4076 7419 4091 7433
4091 7430 4090 7428 4090 7427 4091 7427
4092 7428 4093 7429 4094 7428
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5 INCHES IN 3 HOURS
$$
DJ2 follow-up statements
524
WGUS71 KOKX 082059
FFSOKX
Flash Flood Statement
National Weather Service New York NY
459 PM EDT Thu Jul 8 2021
CTC001-NJC003-013-031-NYC087-119-082215-
/O.CON.KOKX.FF.W.0010.000000T0000Z-210708T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-Bergen NJ-Essex NJ-Passaic NJ-Rockland NY-Westchester
NY-
459 PM EDT Thu Jul 8 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM EDT THIS
EVENING FOR SOUTHERN FAIRFIELD, BERGEN, NORTHEASTERN ESSEX, EASTERN
PASSAIC, ROCKLAND AND SOUTHERN WESTCHESTER COUNTIES...
At 459 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1.5 and 3 inches of rain have
fallen. The expected rainfall rate is 1 to 1.5 inches in 3 hours.
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...
Yonkers, Paterson, Stamford, Passaic, White Plains, Wayne,
Bloomfield, Hackensack, Port Chester, Bergenfield, Paramus,
Ridgewood, Lyndhurst, Rutherford, Nanuet, Tarrytown, Dobbs Ferry,
Nyack, Tappan and Greenwich.
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 4097 7428 4113 7402 4118 7362 4107 7349
4090 7387 4092 7392 4087 7394 4078 7414
4079 7415 4077 7415 4076 7419 4091 7433
4091 7430 4090 7428 4090 7427 4091 7427
4092 7428 4093 7429 4094 7428
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 3 HOURS
$$
DJ114
WGUS71 KOKX 082210
FFSOKX
Flash Flood Statement
National Weather Service New York NY
610 PM EDT Thu Jul 8 2021
CTC001-NJC003-013-031-NYC087-119-082220-
/O.EXP.KOKX.FF.W.0010.000000T0000Z-210708T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fairfield CT-Bergen NJ-Essex NJ-Passaic NJ-Rockland NY-Westchester
NY-
610 PM EDT Thu Jul 8 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 615 PM EDT THIS EVENING FOR
SOUTHERN FAIRFIELD, BERGEN, NORTHEASTERN ESSEX, EASTERN PASSAIC,
ROCKLAND AND SOUTHERN WESTCHESTER COUNTIES...
Flash flooding is no longer expected to pose a threat. 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 4097 7428 4113 7402 4118 7362 4107 7349
4090 7387 4092 7392 4087 7394 4078 7414
4079 7415 4077 7415 4076 7419 4091 7433
4091 7430 4090 7428 4090 7427 4091 7427
4092 7428 4093 7429 4094 7428
$$
DJThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 12:59 PM EDT | Special Weather Statement | OKX | Rockland | 46 min |
| Jul 8, 1:24 PM EDT | Severe Thunderstorm Warning | OKX | Rockland | 51 min |
| Jul 8, 2:11 PM EDT | Severe Thunderstorm Warning | OKX | Bronx, Rockland, Westchester | 49 min |
| Jul 8, 2:29 PM EDT | Areal Flood Advisory | OKX | Rockland, Westchester | 2 hr |
| 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, 3:53 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, Nassau, New York, Queens, Westchester | 3 hr |
| 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, 5:06 PM EDT | Flash Flood Warning | OKX | Bronx, New York, Westchester | 3 hr |
| 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, 6:15 PM EDT | Areal Flood Advisory | OKX | Rockland, Westchester | 3 hr |
| 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 |
| Jul 8, 3:08 PM EDT | Special Weather Statement | OKX | Bergen | 37 min |
| Jul 8, 3:27 PM EDT | Special Weather Statement | OKX | Essex | 48 min |
| 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, 8:25 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 35 min |
| Jul 7, 9:06 PM EDT | Special Weather Statement | OKX | 39 min | |
| Jul 7, 9:41 PM EDT | Special Weather Statement | OKX | 49 min | |
| Jul 8, 12:49 AM EDT | Special Weather Statement | OKX | 41 min | |
| Jul 8, 1:26 AM EDT | Special Weather Statement | OKX | 49 min | |
| Jul 8, 1:30 AM EDT | Special Weather Statement | OKX | 45 min | |
| Jul 8, 2:24 AM EDT | Special Weather Statement | OKX | 51 min | |
| Jul 8, 2:00 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 45 min |
| Jul 8, 2:45 PM EDT | Special Weather Statement | OKX | 45 min | |
| Jul 8, 4:06 PM EDT | Special Weather Statement | OKX | 39 min | |
| Jul 8, 4:22 PM EDT | Areal Flood Advisory | OKX | Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region | 3 hr |
| Jul 8, 4:53 PM EDT | Special Weather Statement | OKX | 52 min |
Nearby
Flash Flood Warnings in New Jersey, 2021Flash Flood Warnings in New York, 2021Flash 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.