Alert archive / New Jersey / Flash Flood Warnings in 2014

Flash Flood Warning 3, NWS New York, NY

May 24, 20144 counties in New Jersey; Rockland County, New York

NWS New York, NY issued this flash flood warning at May 24, 2014, 4:18 PM EDT for 4 counties in New Jersey; Rockland County, New York. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 24, 2014, 4:18 PM EDT (20:18 UTC)
Expired
May 24, 2014, 6:15 PM EDT
In force
117 min
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, Rockland County, NY

The radar

The Philadelphia radar (KDIX), 110 km from the middle of the area, began a volume at 20:17 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 12:00Z, 8.3 hours before the alert went out and 115 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 2014-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2014-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
692 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

448 
WGUS51 KOKX 242018
FFWOKX
NJC003-013-017-031-NYC087-242215-
/O.NEW.KOKX.FF.W.0003.140524T2018Z-140524T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
418 PM EDT SAT MAY 24 2014

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PASSAIC COUNTY IN NORTHEAST NEW JERSEY...
  WESTERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...
  ESSEX COUNTY IN NORTHEAST NEW JERSEY...
  HUDSON COUNTY IN NORTHEAST NEW JERSEY...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 615 PM EDT...

* AT 410 PM EDT...SHOWERS AND THUNDERSTORMS WERE MOVING OVER THE 
REGION...PRODUCING MODERATE TO LOCALLY HEAVY RAINFALL. A HALF INCH
TO INCH OF RAINFALL IS POSSIBLE IN ADDITION TO THE RAINFALL THAT HAS 
ALREADY FALLEN THIS AFTERNOON. THIS WILL LIKELY RESULT IN AREAS OF 
FLASH FLOODING OVER THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 4091 7430 4090 7428 4092 7429 4098 7429
      4113 7428 4112 7402 4072 7404 4072 7431

$$

JC
2 follow-up statements
840 
WGUS71 KOKX 242130
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
530 PM EDT SAT MAY 24 2014

NJC003-013-017-031-NYC087-242215-
/O.CON.KOKX.FF.W.0003.000000T0000Z-140524T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROCKLAND NY-HUDSON NJ-ESSEX NJ-BERGEN NJ-PASSAIC NJ-
530 PM EDT SAT MAY 24 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR
PASSAIC...WESTERN BERGEN...ESSEX...HUDSON AND ROCKLAND COUNTIES...

AT 524 PM EDT...AN AREA OF MODERATE TO LOCALLY HEAVY RAINFALL IS 
STILL MOVING THROUGH THE WARNED AREA. UP TO AN INCH OF RAINFALL HAS 
ALREADY FALLEN IN SOME AREAS OVER THE PAST HOUR OR TWO...AND UP TO 
ADDITIONAL QUARTER TO HALF INCH OF RAINFALL IS POSSIBLE. FLASH 
FLOODING IS LIKELY ACROSS PORTIONS OF THE AREA.

LAT...LON 4091 7430 4090 7428 4092 7429 4098 7429
      4113 7428 4112 7402 4072 7404 4072 7431

$$

JC
190 
WGUS71 KOKX 242207
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
607 PM EDT SAT MAY 24 2014

NJC003-013-017-031-NYC087-242218-
/O.EXP.KOKX.FF.W.0003.000000T0000Z-140524T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROCKLAND NY-HUDSON NJ-ESSEX NJ-BERGEN NJ-PASSAIC NJ-
607 PM EDT SAT MAY 24 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM EDT FOR PASSAIC...
WESTERN BERGEN...ESSEX...HUDSON AND ROCKLAND COUNTIES...

LAT...LON 4091 7430 4090 7428 4092 7429 4098 7429
      4113 7428 4112 7402 4072 7404 4072 7431

$$

JC

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 8:49 PM EDTAreal Flood AdvisoryOKXBergen, Passaic3 hr
May 24, 3:51 PM EDTAreal Flood AdvisoryOKXBergen, Essex, Hudson, Passaic, Union84 min
May 23, 8:08 PM EDTAreal Flood AdvisoryOKXKings, Nassau, Queens4 hr
May 24, 3:15 PM EDTSpecial Weather StatementOKXOrange30 min
May 24, 7:40 PM EDTSpecial Weather StatementOKXPutnam50 min

Nearby

Flash Flood Warnings in New Jersey, 2014Flash Flood Warnings in New York, 2014Every flash flood warning in 2014

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.