Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 3, NWS New York, NY

May 18, 20115 counties in New Jersey; Richmond County, New York

NWS New York, NY issued this flash flood warning at May 18, 2011, 3:36 PM EDT for 5 counties in New Jersey; Richmond County, New York. 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: May 18, 2011, 3:36 PM EDT (19:36 UTC)
Expired: May 18, 2011, 6:30 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, Richmond County, NY

The radar

The Philadelphia radar (KDIX), 85 km from the middle of the area, began a volume at 19:36 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
May 18, 4:00 PM EDT	FLASH FLOOD	3 E Millburn, NJ	DEPARTMENT OF PUBLIC WORKS HAD TO EVACUATE BUILDING BECAUSE THE RAHWAY RIVER WAS FLOODING.
May 18, 4:00 PM EDT	FLASH FLOOD	Newark, NJ	MAJOR FLOODING THROUGHOUT NEWARK LEADING TO STRANDED CARS.
May 18, 4:00 PM EDT	FLASH FLOOD	South Orange, NJ	DEPARTMENT OF PUBLIC
May 18, 5:10 PM EDT	FLASH FLOOD	6 W Harrison, NJ	CAR STRANDED AT INTERSECTION OF WEST SOUTH ORANGE AVENUE AND CHURCH STREET.
May 18, 5:34 PM EDT	FLASH FLOOD	5 W Harrison, NJ	CAR STRANDED AT INTERSECTION OF WARD PLACE AND WILDEN PLACE.

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, 7.6 hours before the alert went out and 118 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: 225 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 436 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

682 
WGUS51 KOKX 181936
FFWOKX
NJC003-013-017-031-039-NYC085-182230-
/O.NEW.KOKX.FF.W.0003.110518T1936Z-110518T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
336 PM EDT WED MAY 18 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PASSAIC COUNTY IN NORTHEAST NEW JERSEY...
  RICHMOND (STATEN ISLAND) COUNTY IN SOUTHEAST NEW YORK...
  UNION COUNTY IN NORTHEAST NEW JERSEY...
  ESSEX COUNTY IN NORTHEAST NEW JERSEY...
  SOUTHERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...
  HUDSON COUNTY IN NORTHEAST NEW JERSEY...

* UNTIL 630 PM EDT...

* AT 330 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM AN AREA OF SHOWERS AND THUNDERSTORMS OVER THE 
WARNED AREA. VERY HEAVY RAINFALL CONTINUES TO TRACK ACROSS THE AREA 
FROM THE SOUTHEAST AT 25 MPH. RAINFALL RATES OF 1 TO 1 1/2 INCHES AN 
HOUR ARE EXPECTED. THE HEAVY RAIN IS FORECAST TO PERSIST INTO THIS 
EVENING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN UPTON
NY.

&&

LAT...LON 4055 7424 4059 7421 4059 7446 4065 7441
      4064 7445 4067 7446 4074 7437 4079 7437
      4086 7432 4090 7434 4090 7428 4096 7428
      4086 7394 4077 7400 4070 7401 4067 7407
      4059 7405 4054 7413 4050 7424

$$

DSW

2 follow-up statements

647 
WGUS71 KOKX 182048
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
448 PM EDT WED MAY 18 2011

NJC017-NYC085-182056-
/O.CAN.KOKX.FF.W.0003.000000T0000Z-110518T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUDSON NJ-RICHMOND (STATEN ISLAND) NY-
448 PM EDT WED MAY 18 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR RICHMOND (STATEN
ISLAND) AND HUDSON COUNTIES...

THE HEAVY RAINFALL HAS ENDED ACROSS THE AREA. THE FLASH FLOOD 
WARNING HAS THEREFORE BEEN CANCELLED.

LAT...LON 4063 7441 4064 7445 4067 7446 4074 7437
      4079 7437 4086 7432 4090 7434 4090 7428
      4096 7428 4086 7394 4080 7398 4082 7403
      4076 7409 4077 7415 4074 7416 4073 7412
      4070 7412 4063 7420 4059 7421 4059 7446

$$

NJC003-013-031-039-182230-
/O.CON.KOKX.FF.W.0003.000000T0000Z-110518T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERGEN NJ-ESSEX NJ-UNION NJ-PASSAIC NJ-
448 PM EDT WED MAY 18 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR
PASSAIC...UNION...ESSEX AND SOUTH CENTRAL BERGEN COUNTIES...

AT 445 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE HEAVY RAINFALL ACROSS THE AREA WAS COMING TO AN END. SOME 
OF THE RIVERS AND STREAMS HOWEVER WILL CONTINUE TO RESPOND TO THE 
RECENT RAINFALL...SO THE WARNING IS CONTINUED. 

THE FLOOD THREAT IS EXPECTED TO DIMINISH BY 6 PM.

LAT...LON 4063 7441 4064 7445 4067 7446 4074 7437
      4079 7437 4086 7432 4090 7434 4090 7428
      4096 7428 4086 7394 4080 7398 4082 7403
      4076 7409 4077 7415 4074 7416 4073 7412
      4070 7412 4063 7420 4059 7421 4059 7446

$$

JMC

776 
WGUS71 KOKX 182230
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
630 PM EDT WED MAY 18 2011

NJC003-013-031-039-182241-
/O.EXP.KOKX.FF.W.0003.000000T0000Z-110518T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERGEN NJ-ESSEX NJ-UNION NJ-PASSAIC NJ-
630 PM EDT WED MAY 18 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR PASSAIC...UNION...ESSEX
AND SOUTH CENTRAL BERGEN COUNTIES...

LAT...LON 4063 7441 4064 7445 4067 7446 4074 7437
      4079 7437 4086 7432 4090 7434 4090 7428
      4096 7428 4086 7394 4080 7398 4082 7403
      4076 7409 4077 7415 4074 7416 4073 7412
      4070 7412 4063 7420 4059 7421 4059 7446

$$

JMC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 3:43 AM EDT	Coastal Flood Advisory	OKX	Hudson	23 hr
May 18, 1:08 PM EDT	Special Weather Statement	OKX	Bergen, Essex, Hudson, Passaic, Union	52 min
May 18, 2:28 PM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Hudson, Passaic, Union	4 hr
May 18, 6:38 PM EDT	Areal Flood Warning	OKX	Essex, Passaic, Union	112 min
May 17, 9:44 PM EDT	Flash Flood Warning	OKX	Suffolk	2 hr
May 18, 12:36 AM EDT	Areal Flood Advisory	OKX	Suffolk	54 min
May 18, 3:43 AM EDT	Coastal Flood Warning	OKX	Nassau	19 hr
May 18, 2:26 PM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens	4 hr
May 18, 2:29 PM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens	29 min
May 18, 4:31 PM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	89 min
May 18, 6:14 PM EDT	Areal Flood Advisory	OKX	Suffolk	61 min
May 18, 6:30 PM EDT	Areal Flood Advisory	OKX	Putnam	90 min

Nearby

Flash Flood Warnings in New Jersey, 2011 Flash Flood Warnings in New York, 2011 Every flash flood warning in 2011

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.