Alert archive / New Jersey / Flash Flood Warnings in 2021

Flash Flood Warning 2, NWS New York, NY

June 8, 20215 counties in New Jersey

NWS New York, NY issued this flash flood warning at Jun 8, 2021, 3:15 PM EDT for 5 counties in New Jersey. It was in force for 3 hr. 3 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
Jun 8, 2021, 3:15 PM EDT (19:15 UTC)
Expired
Jun 8, 2021, 6:15 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, Hudson County, NJ, Passaic County, NJ, Union County, NJ

The radar

The Philadelphia radar (KDIX), 89 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

TimeReportWhereRemark
Jun 8, 3:27 PM EDTFLASH FLOODHackensack, NJROADWAY FLOODED AND OCCUPIED VEHICLE STUCK IN FLOOD WATERS AT PLEASANTVIEW AND SUMMIT AVENUE.
Jun 8, 3:45 PM EDTFLASH FLOODHarrison, NJMULTIPLE ROAD CLOSURES WITH ROADS IMPASSABLE AND UNDER WATER AT RODGERS BOULEVARD AND OTHER LOCATIONS IN TOWN.
Jun 8, 4:40 PM EDTFLASH FLOOD1 Ese Lodi, NJALL LANES CLOSED DUE TO FLOODING ON NJ 17 SOUTHBOUND, NORTH OF US 46 HASBRUCK HEIGHTS.

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 120 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2021-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 740 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2021-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
740 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
1004 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

964 
WGUS51 KOKX 081915
FFWOKX
NJC003-013-017-031-039-082215-
/O.NEW.KOKX.FF.W.0002.210608T1915Z-210608T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Upton NY
315 PM EDT Tue Jun 8 2021

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Southeastern Bergen County in northeastern New Jersey...
  Essex County in northeastern New Jersey...
  Hudson County in northeastern New Jersey...
  Eastern Passaic County in northeastern New Jersey...
  Union County in northeastern New Jersey...

* Until 615 PM EDT.

* At 315 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Newark, Jersey City, Paterson, Elizabeth, Passaic, Bayonne, 
  Plainfield, Bloomfield, Hackensack, Linden, Orange, Bergenfield, 
  Summit, Lyndhurst, Millburn, Rutherford, Secaucus, Harrison, 
  Ridgefield and Caldwell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you 
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring. 
If you are in the warned area move to higher ground immediately. 
Residents living along streams and creeks should take immediate 
precautions to protect life and property.

&&

LAT...LON 4075 7436 4076 7438 4086 7431 4086 7434
      4090 7433 4090 7428 4092 7427 4093 7392
      4077 7401 4065 7412 4065 7419 4061 7420
      4059 7429 4061 7431 4060 7445 4065 7440
      4065 7445 4067 7445

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5-2 INCHES IN 1 HOUR 

$$

JC
1 follow-up statement
004 
WGUS71 KOKX 082205
FFSOKX

Flash Flood Statement
National Weather Service Upton NY
605 PM EDT Tue Jun 8 2021

NJC003-013-017-031-039-082215-
/O.EXP.KOKX.FF.W.0002.000000T0000Z-210608T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bergen NJ-Essex NJ-Hudson NJ-Passaic NJ-Union NJ-
605 PM EDT Tue Jun 8 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 615 PM EDT THIS EVENING FOR 
SOUTHEASTERN BERGEN, ESSEX, HUDSON, EASTERN PASSAIC AND UNION 
COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 4075 7436 4076 7438 4086 7431 4086 7434
      4090 7433 4090 7428 4092 7427 4093 7392
      4077 7401 4065 7412 4065 7419 4061 7420
      4059 7429 4061 7431 4060 7445 4065 7440
      4065 7445 4067 7445

$$

JC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 2:02 PM EDTAreal Flood AdvisoryOKXPassaic118 min
Jun 8, 2:26 PM EDTSpecial Weather StatementOKXBergen, Passaic49 min
Jun 8, 2:40 PM EDTSevere Thunderstorm WarningOKXBergen35 min
Jun 8, 2:58 PM EDTSevere Thunderstorm WarningOKXBergen47 min
Jun 8, 3:06 PM EDTAreal Flood AdvisoryOKXBergen114 min
Jun 8, 3:10 PM EDTSevere Thunderstorm WarningOKXBergen50 min
Jun 8, 3:14 PM EDTSpecial Weather StatementOKXEssex, Union46 min
Jun 8, 3:29 PM EDTSevere Thunderstorm WarningOKXBergen, Essex, Hudson, Union46 min
Jun 8, 3:30 PM EDTFlash Flood WarningOKXBergen3 hr
Jun 8, 3:49 PM EDTFlash Flood WarningOKXHudson2 hr
Jun 8, 4:15 PM EDTSevere Thunderstorm WarningOKXHudson43 min

Nearby

Flash 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.