Alert archive / New Jersey / Flash Flood Warnings in 2021
Flash Flood Warning 17, NWS New York, NY
NWS New York, NY issued this flash flood warning at Jul 12, 2021, 6:09 PM EDT for Bergen County, Essex County, Passaic County, New Jersey; Orange County, Rockland County, New York. It was in force for 3 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 12, 2021, 6:09 PM EDT (22:09 UTC)
- Expired
- Jul 12, 2021, 9:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bergen County, NJ, Essex County, NJ, Passaic County, NJ, Orange County, NY, Rockland County, NY
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 22:09 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 12, 7:23 PM EDT | FLASH FLOOD | 1 Nne Wanaque, NJ | RINGWOOD AVE IMPASSABLE. TWO FEET OF WATER. |
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, 10.2 hours before the alert went out and 125 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
- 857 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 697 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.4
The text
As transmitted.
438
WGUS51 KOKX 122209
FFWOKX
NJC003-013-031-NYC071-087-130115-
/O.NEW.KOKX.FF.W.0017.210712T2209Z-210713T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
609 PM EDT Mon Jul 12 2021
The National Weather Service in Upton has issued a
* Flash Flood Warning for...
Northern Bergen County in northeastern New Jersey...
Northern Essex County in northeastern New Jersey...
Passaic County in northeastern New Jersey...
South Central Orange County in southeastern New York...
Rockland County in southeastern New York...
* Until 915 PM EDT.
* At 609 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 1.5 inches of
rain have fallen. The expected rainfall rate is 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...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...
Paterson, Passaic, Wayne, Bloomfield, New City, Paramus, West
Milford, Ridgewood, Monsey, Nanuet, Ramsey, Ringwood, Pompton
Lakes, Suffern, Caldwell, Warwick, Sloatsburg, Hawthorne, Pearl
River and Bloomingdale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 4130 7439 4114 7389 4077 7419 4083 7433
4086 7432 4087 7434 4091 7433 4090 7428
4091 7427 4093 7429 4097 7428 4100 7430
4102 7443 4105 7445 4104 7450 4108 7449
4109 7450 4120 7437 4125 7446
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2 INCHES IN 1 HOUR
$$
JM3 follow-up statements
760
WGUS71 KOKX 122322
FFSOKX
Flash Flood Statement
National Weather Service New York NY
722 PM EDT Mon Jul 12 2021
NJC003-013-031-NYC071-087-130115-
/O.CON.KOKX.FF.W.0017.000000T0000Z-210713T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bergen NJ-Essex NJ-Passaic NJ-Orange NY-Rockland NY-
722 PM EDT Mon Jul 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT THIS
EVENING FOR NORTHWESTERN BERGEN, NORTHWESTERN ESSEX, PASSAIC, SOUTH
CENTRAL ORANGE AND ROCKLAND COUNTIES...
At 722 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 3.5 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 1 to 3 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...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Paterson, Wayne, Paramus, West Milford, Ridgewood, Monsey, Nanuet,
Ramsey, Ringwood, Pompton Lakes, Suffern, Caldwell, Sloatsburg,
Hawthorne, Pearl River, Bloomingdale, Fairfield, Greenwood Lake,
Upper Greenwood Lake and Fair Lawn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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.
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 4124 7433 4124 7428 4109 7397 4094 7407
4083 7423 4083 7433 4086 7432 4087 7434
4091 7433 4090 7428 4091 7427 4093 7429
4097 7428 4100 7430 4102 7443 4105 7445
4104 7450 4107 7449 4109 7450
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
JM670
WGUS71 KOKX 130014
FFSOKX
Flash Flood Statement
National Weather Service New York NY
814 PM EDT Mon Jul 12 2021
NJC003-013-031-NYC071-087-130115-
/O.CON.KOKX.FF.W.0017.000000T0000Z-210713T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bergen NJ-Essex NJ-Passaic NJ-Orange NY-Rockland NY-
814 PM EDT Mon Jul 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT THIS
EVENING FOR NORTHWESTERN BERGEN, NORTHWESTERN ESSEX, PASSAIC, SOUTH
CENTRAL ORANGE AND ROCKLAND COUNTIES...
At 814 PM EDT, Doppler radar indicated lighter rain showers moving
across the area, but there are still areas of residual flooding.
Thunderstorms produced heavy rain across the warned area earlier
this evening. Between 2 and 4 inches of rain have fallen so far.
Flash flooding is expected to be ongoing in some areas.
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...
Paterson, Wayne, Paramus, West Milford, Ridgewood, Monsey, Nanuet,
Ramsey, Ringwood, Pompton Lakes, Suffern, Caldwell, Sloatsburg,
Hawthorne, Pearl River, Bloomingdale, Fairfield, Greenwood Lake,
Upper Greenwood Lake and Fair Lawn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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.
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 4124 7433 4124 7428 4109 7397 4094 7407
4083 7423 4083 7433 4086 7432 4087 7434
4091 7433 4090 7428 4091 7427 4093 7429
4097 7428 4100 7430 4102 7443 4105 7445
4104 7450 4107 7449 4109 7450
FLASH FLOOD...RADAR INDICATED
$$
JM800
WGUS71 KOKX 130117
FFSOKX
Flash Flood Statement
National Weather Service New York NY
917 PM EDT Mon Jul 12 2021
NJC003-013-031-NYC071-087-130127-
/O.EXP.KOKX.FF.W.0017.000000T0000Z-210713T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bergen NJ-Essex NJ-Passaic NJ-Orange NY-Rockland NY-
917 PM EDT Mon Jul 12 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN BERGEN,
NORTHWESTERN ESSEX, PASSAIC, SOUTH CENTRAL ORANGE AND ROCKLAND
COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 1000 AM EDT Tuesday for
portions of southern Connecticut, northeast New Jersey and southeast
New York.
LAT...LON 4124 7433 4124 7428 4109 7397 4094 7407
4083 7423 4083 7433 4086 7432 4087 7434
4091 7433 4090 7428 4091 7427 4093 7429
4097 7428 4100 7430 4102 7443 4105 7445
4104 7450 4107 7449 4109 7450
$$
JMThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 2:18 AM EDT | Special Weather Statement | OKX | Hudson | 42 min |
| Jul 12, 3:53 PM EDT | Areal Flood Advisory | OKX | Union | 49 min |
| Jul 12, 4:18 PM EDT | Areal Flood Advisory | OKX | Bergen, Hudson | 52 min |
| Jul 12, 4:55 PM EDT | Areal Flood Advisory | OKX | Bergen | 32 min |
| Jul 12, 5:38 PM EDT | Areal Flood Advisory | OKX | Bergen, Essex, Passaic | 112 min |
| Jul 12, 5:41 PM EDT | Special Weather Statement | OKX | Passaic | 49 min |
| Jul 12, 5:51 PM EDT | Severe Thunderstorm Warning | OKX | Bergen, Passaic | 39 min |
| Jul 12, 6:15 PM EDT | Tornado Warning | OKX | Bergen, Passaic | 45 min |
| Jul 12, 6:58 PM EDT | Severe Thunderstorm Warning | OKX | Bergen, Essex, Passaic | 41 min |
| Jul 12, 3:37 PM EDT | Special Marine Warning | OKX | 38 min | |
| Jul 12, 3:45 PM EDT | Special Weather Statement | OKX | Richmond | 30 min |
| Jul 12, 7:46 PM EDT | Areal Flood Advisory | OKX | Orange | 119 min |
Nearby
Flash Flood Warnings in New Jersey, 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.