Alert archive / New Jersey / Flash Flood Warnings in 2021

Flash Flood Warning 48, NWS New York, NY

October 25, 2021Essex County, Passaic County, New Jersey

NWS New York, NY issued this flash flood warning at Oct 25, 2021, 9:42 PM EDT for Essex County, Passaic County, New Jersey. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 25, 2021, 9:42 PM EDT (01:42 UTC)
Expired: Oct 26, 2021, 12:45 AM EDT
In force: 3 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Essex County, NJ, Passaic County, NJ

The radar

The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 01:42 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.7 hours before the alert went out and 117 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: 544 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 758 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

834 
WGUS51 KOKX 260142
FFWOKX
NJC013-031-260445-
/O.NEW.KOKX.FF.W.0048.211026T0142Z-211026T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
942 PM EDT Mon Oct 25 2021

The National Weather Service in Upton has issued a

* Flash Flood Warning for...
  Northern Essex County in northeastern New Jersey...
  Eastern Passaic County in northeastern New Jersey...

* Until 1245 AM EDT.

* At 942 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...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, Caldwell, Hawthorne, Fairfield, Clifton, 
  Little Falls, Verona, Cedar Grove, Woodland Park, Totowa, West 
  Caldwell, North Haledon, Haledon, North Caldwell and Prospect Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4090 7427 4092 7427 4093 7429 4095 7428
      4098 7428 4098 7430 4099 7427 4098 7416
      4097 7414 4094 7415 4093 7414 4092 7413
      4082 7412 4084 7433 4086 7432 4087 7434
      4089 7434 4091 7433 4090 7428

FLASH FLOOD...RADAR INDICATED

$$

JMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 25, 10:33 PM EDT	Flash Flood Warning	OKX	Bergen	3 hr
Oct 26, 3:12 AM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Hudson, Passaic, Union	5 hr
Oct 26, 6:03 AM EDT	Areal Flood Advisory	OKX	Bergen, Passaic	3 hr
Oct 26, 7:39 AM EDT	Flash Flood Warning	OKX	Bergen, Essex, Hudson, Passaic, Union	3 hr
Oct 26, 10:05 AM EDT	River Flood Warning	OKX	Bergen	14 hr
Oct 26, 10:38 AM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Hudson, Passaic	112 min
Oct 26, 1:45 PM EDT	River Flood Warning	OKX	Bergen, Passaic	36 hr
Oct 26, 2:58 PM EDT	Areal Flood Advisory	OKX	Bergen	3 hr
Oct 26, 7:11 PM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Hudson, Passaic, Union	3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.