Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 28, NWS New York, NY

August 19, 2011Rockland County, New York; Bergen County, Passaic County, New Jersey

NWS New York, NY issued this flash flood warning at Aug 19, 2011, 5:59 PM EDT for Rockland County, New York; Bergen County, Passaic County, New Jersey. It was in force for 91 min. 4 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: Aug 19, 2011, 5:59 PM EDT (21:59 UTC)
Expired: Aug 19, 2011, 7:30 PM EDT
In force: 91 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Bergen County, NJ, Passaic County, NJ, Rockland County, NY

The radar

The Brookhaven radar (KOKX), 121 km from the middle of the area, began a volume at 22:00 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
Aug 19, 7:09 PM EDT	FLASH FLOOD	River Edge, NJ	FLOODING AT MIDLAND AVENUE AT LAUREL AND MAGNOLIA AVENUES. ROAD IMPASSABLE.
Aug 19, 7:10 PM EDT	FLASH FLOOD	Oradell, NJ	KINDERKAMACK ROAD CLOSED DUE TO FLOODING.
Aug 19, 7:14 PM EDT	FLASH FLOOD	New Milford, NJ	FLOODING AT RIVER EDGE AVENUE. ROAD IMPASSABLE.
Aug 19, 7:19 PM EDT	FLASH FLOOD	Old Tappan, NJ	ONE CAR STRANDED IN FLOODING ON FRED STREET.

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, 10.0 hours before the alert went out and 121 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: 897 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 993 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 23 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.

674 
WGUS51 KOKX 192159
FFWOKX
NJC003-031-NYC087-192330-
/O.NEW.KOKX.FF.W.0028.110819T2159Z-110819T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
559 PM EDT FRI AUG 19 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 730 PM EDT...

* AT 556 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM
  SUFFERN TO 11 MILES SOUTHWEST OF BLOOMINGDALE...OR ALONG A LINE
  EXTENDING FROM SUFFERN TO PARSIPPANY-TROY HILLS TOW...MOVING EAST
  AT 10 MPH.

* THUNDERSTORMS PRODUCING FLASH FLOODING WILL BE NEAR...
  SUFFERN BY 605 PM EDT...
  RAMSEY BY 615 PM EDT...
  MONSEY BY 620 PM EDT...
  WAYNE BY 625 PM EDT...
  NANUET BY 635 PM EDT...
  HAWTHORNE BY 640 PM EDT...

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.

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 4119 7438 4114 7425 4119 7416 4107 7389
      4095 7390 4081 7408 4089 7428 4092 7429
      4097 7428 4098 7430 4101 7443 4104 7444
      4104 7448 4105 7451 4108 7451

$$

JM

1 follow-up statement

381 
WGUS71 KOKX 192257
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
657 PM EDT FRI AUG 19 2011

NJC003-031-NYC087-192330-
/O.CON.KOKX.FF.W.0028.000000T0000Z-110819T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERGEN NJ-ROCKLAND NY-PASSAIC NJ-
657 PM EDT FRI AUG 19 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR
PASSAIC...ROCKLAND AND BERGEN COUNTIES...

AT 656 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM ORANGEBURG TO PASSAIC...OR ALONG
A LINE EXTENDING FROM TAPPAN TO BLOOMFIELD...MOVING SOUTHEAST AT 25
MPH.

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.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4097 7428 4113 7403 4107 7389 4095 7390
      4081 7408 4089 7428 4091 7428 4092 7429

$$

MALOIT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 8:19 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Queens	26 min
Aug 18, 8:30 PM EDT	Areal Flood Advisory	OKX	Nassau, Queens, Suffolk	60 min
Aug 18, 8:45 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Suffolk	30 min
Aug 18, 8:54 PM EDT	Special Weather Statement	OKX	Putnam, Westchester	66 min
Aug 18, 9:03 PM EDT	Special Marine Warning	OKX		42 min
Aug 18, 9:33 PM EDT	Areal Flood Advisory	OKX	Suffolk	57 min
Aug 18, 9:33 PM EDT	Severe Thunderstorm Warning	OKX	Suffolk	42 min
Aug 18, 9:40 PM EDT	Special Marine Warning	OKX		35 min
Aug 18, 10:01 PM EDT	Severe Thunderstorm Warning	OKX	Suffolk	26 min
Aug 18, 10:38 PM EDT	Special Weather Statement	OKX	Bronx, Rockland	52 min
Aug 18, 10:45 PM EDT	Severe Thunderstorm Warning	OKX	Rockland, Westchester	45 min
Aug 19, 12:33 PM EDT	Special Weather Statement	OKX	Orange	57 min
Aug 19, 3:16 PM EDT	Special Weather Statement	OKX	Orange	44 min
Aug 19, 4:00 PM EDT	Special Weather Statement	OKX	Orange	45 min
Aug 19, 4:03 PM EDT	Severe Thunderstorm Warning	OKX	Orange	42 min
Aug 19, 4:15 PM EDT	Areal Flood Advisory	OKX	Orange	60 min
Aug 19, 4:28 PM EDT	Flash Flood Warning	OKX	Orange	2 hr
Aug 19, 4:43 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	62 min
Aug 19, 5:17 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Putnam	43 min
Aug 19, 5:42 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	30 min
Aug 19, 5:46 PM EDT	Severe Thunderstorm Warning	OKX	Putnam	59 min
Aug 19, 6:03 PM EDT	Severe Thunderstorm Warning	OKX	Putnam, Rockland, Westchester	45 min
Aug 19, 6:24 PM EDT	Special Marine Warning	OKX		51 min
Aug 19, 6:27 PM EDT	Flash Flood Warning	OKX	Putnam, Rockland, Westchester	42 min
Aug 19, 6:29 PM EDT	Severe Thunderstorm Warning	OKX	Rockland, Westchester	46 min
Aug 19, 6:46 PM EDT	Flash Flood Warning	OKX	Richmond	59 min
Aug 19, 6:59 PM EDT	Severe Thunderstorm Warning	OKX	Kings, Richmond	46 min
Aug 19, 7:00 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, New York, Westchester	45 min
Aug 19, 7:09 PM EDT	Special Weather Statement	OKX	New York	51 min
Aug 19, 7:16 PM EDT	Severe Thunderstorm Warning	OKX	Kings, New York, Queens	44 min
Aug 19, 7:18 PM EDT	Special Marine Warning	OKX		57 min
Aug 19, 7:24 PM EDT	Flash Flood Warning	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more	66 min
Aug 19, 7:35 PM EDT	Special Marine Warning	OKX		55 min
Aug 19, 7:46 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Queens	44 min
Aug 18, 9:45 PM EDT	Special Weather Statement	OKX	Bergen, Essex, Hudson, Passaic, Union	60 min
Aug 18, 10:15 PM EDT	Severe Thunderstorm Warning	OKX	Bergen, Essex, Hudson, Passaic, Union	47 min
Aug 18, 10:21 PM EDT	Areal Flood Advisory	OKX	Bergen, Essex, Hudson, Passaic, Union	84 min
Aug 19, 5:05 PM EDT	Flash Flood Warning	OKX	Passaic	55 min
Aug 19, 6:10 PM EDT	Special Weather Statement	OKX	Bergen, Essex, Union	65 min
Aug 19, 6:20 PM EDT	Severe Thunderstorm Warning	OKX	Bergen, Essex, Hudson, Passaic, Union	40 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.