Alert archive / New Jersey / Flash Flood Warnings in 2021

Flash Flood Warning 21, NWS New York, NY

July 29, 2021Essex County, New Jersey

NWS New York, NY issued this flash flood warning at Jul 29, 2021, 6:47 PM EDT for Essex County, New Jersey. 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 29, 2021, 6:47 PM EDT (22:47 UTC)
Expired: Jul 29, 2021, 9:26 PM EDT
In force: 3 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Essex County, NJ

The radar

The Philadelphia radar (KDIX), 99 km from the middle of the area, began a volume at 22:48 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 29, 6:51 PM EDT	FLASH FLOOD	1 Ssw Clifton, NJ	FLOODING ON NJ 3 WESTBOUND EAST OF GARDEN STATE PARKWAY. 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, 10.8 hours before the alert went out and 119 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 54 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 823 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

269 
WGUS51 KOKX 292247
FFWOKX
NJC013-300045-
/O.NEW.KOKX.FF.W.0021.210729T2247Z-210730T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
647 PM EDT Thu Jul 29 2021

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Central Essex County in northeastern New Jersey...

* Until 845 PM EDT.

* At 647 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain in Lindurst. Between 1 and 2.5 inches of rain have 
  fallen. Additional rainfall amounts up to 1 inch 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...
  Bloomfield, Orange, Caldwell, Fairfield, East Orange, West Orange, 
  Montclair, Belleville, Livingston, Nutley, Verona, Cedar Grove, 
  West Caldwell, Glen Ridge, North Caldwell and Roseland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4077 7437 4080 7436 4082 7433 4083 7434
      4083 7433 4084 7433 4085 7433 4086 7432
      4087 7434 4088 7434 4090 7432 4089 7427
      4088 7426 4088 7424 4082 7413 4082 7414
      4080 7414 4077 7416 4076 7427

FLASH FLOOD...RADAR INDICATED

$$

3 follow-up statements

195 
WGUS71 KOKX 292353
FFSOKX

Flash Flood Statement
National Weather Service New York NY
753 PM EDT Thu Jul 29 2021

NJC013-300045-
/O.CON.KOKX.FF.W.0021.000000T0000Z-210730T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Essex NJ-
753 PM EDT Thu Jul 29 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT THIS 
EVENING FOR CENTRAL ESSEX COUNTY...

At 753 PM EDT, Trained weather spotters reported thunderstorms 
producing heavy rain in Lyndhurst, resulting in flash flooding.
The rain has moved out of the area, however, flooding is likely 
on-going, and the flash flood warning remains in effect.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Trained spotters reported.

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...
  Bloomfield, Orange, Caldwell, Fairfield, East Orange, West Orange, 
  Montclair, Belleville, Livingston, Nutley, Verona, Cedar Grove, 
  West Caldwell, Glen Ridge, North Caldwell and Roseland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 4077 7437 4080 7436 4082 7433 4083 7434
      4083 7433 4084 7433 4085 7433 4086 7432
      4087 7434 4088 7434 4090 7432 4089 7427
      4088 7426 4088 7424 4082 7413 4082 7414
      4080 7414 4077 7416 4076 7427

FLASH FLOOD...OBSERVED

$$

MET

006 
WGUS51 KOKX 300034
FFWOKX
NJC013-300145-
/O.EXT.KOKX.FF.W.0021.000000T0000Z-210730T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
834 PM EDT Thu Jul 29 2021

The National Weather Service in Upton has extended the

* Flash Flood Warning for...
  Central Essex County in northeastern New Jersey...

* Until 945 PM EDT.

* At 834 PM EDT, The Third River at Bloomfield remains in flood. 
  Flood stage is 6.0 feet and at 820 PM EDT the stage was 6.5 feet. 
  Flooding was also reported in Lyndhurst earlier this evening by 
  trained spotters.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Trained spotters reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

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.

&&

LAT...LON 4077 7437 4080 7436 4082 7433 4083 7434
      4083 7433 4084 7433 4085 7433 4086 7432
      4087 7434 4088 7434 4090 7432 4089 7427
      4088 7426 4088 7424 4082 7413 4082 7414
      4080 7414 4077 7416 4076 7427

FLASH FLOOD...OBSERVED

$$

MET

177 
WGUS71 KOKX 300126
FFSOKX

Flash Flood Statement
National Weather Service New York NY
926 PM EDT Thu Jul 29 2021

NJC013-300136-
/O.CAN.KOKX.FF.W.0021.000000T0000Z-210730T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Essex NJ-
926 PM EDT Thu Jul 29 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL ESSEX COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

LAT...LON 4077 7437 4080 7436 4082 7433 4083 7434
      4083 7433 4084 7433 4085 7433 4086 7432
      4087 7434 4088 7434 4090 7432 4089 7427
      4088 7426 4088 7424 4082 7413 4082 7414
      4080 7414 4077 7416 4076 7427

$$

DW

The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 4:59 PM EDT	Special Weather Statement	OKX	Essex	46 min
Jul 29, 5:36 PM EDT	Tornado Warning	OKX	Essex	24 min
Jul 29, 5:44 PM EDT	Areal Flood Advisory	OKX	Essex	63 min
Jul 29, 5:59 PM EDT	Tornado Warning	OKX	Essex	9 min
Jul 29, 7:15 PM EDT	Areal Flood Advisory	OKX	Bergen, Hudson, Passaic	2 hr

Nearby

Flash Flood Warnings in New Jersey, 2021 Every 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.