Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 36, NWS New York, NY

September 5, 2011Bergen County, Passaic County, New Jersey; Orange County, Rockland County, New York

NWS New York, NY issued this flash flood warning at Sep 5, 2011, 7:17 PM EDT for Bergen County, Passaic County, New Jersey; Orange County, Rockland County, New York. It was in force for 4 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: Sep 5, 2011, 7:17 PM EDT (23:17 UTC)
Expired: Sep 5, 2011, 10:55 PM EDT
In force: 4 hr
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

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

The radar

The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 23:21 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, 11.3 hours before the alert went out and 128 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: 116 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 704 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 99 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.

198 
WGUS51 KOKX 052317
FFWOKX
NJC003-031-NYC071-087-060315-
/O.NEW.KOKX.FF.W.0036.110905T2317Z-110906T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
717 PM EDT MON SEP 5 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...
  SOUTHERN ORANGE COUNTY IN SOUTHEAST NEW YORK...
  NORTHWESTERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...

* UNTIL 1115 PM EDT...

* AT 710 PM EDT...BANDS OF HEAVY SHOWERS AND EMBEDDED THUNDERSTORMS 
WITH RAINFALL RATES OF 1 TO 1 1/2 INCHES PER HOUR WERE...MOVING 
NORTHEAST AT 15 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BETWEEN 1 TO 1 1/2 INCHES OF RAIN HAVE FALLEN OVER ALREADY 
SATURATED GROUNDS. AN ADDITIONAL 1 TO 1 1/2 INCHES OF RAIN ARE 
POSSIBLE THROUGH 11 PM.

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.

&&

LAT...LON 4119 7438 4121 7440 4138 7410 4114 7390
      4095 7428 4097 7428 4099 7431 4101 7443
      4104 7444 4104 7447 4102 7448 4103 7450
      4107 7450 4108 7451

$$

NV

2 follow-up statements

786 
WGUS71 KOKX 060120
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
920 PM EDT MON SEP 5 2011

NJC003-031-NYC071-087-060315-
/O.CON.KOKX.FF.W.0036.000000T0000Z-110906T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERGEN NJ-ORANGE NY-ROCKLAND NY-PASSAIC NJ-
920 PM EDT MON SEP 5 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT FOR
PASSAIC...ROCKLAND...SOUTH CENTRAL ORANGE AND NORTHWESTERN BERGEN
COUNTIES...

AT 905 PM EDT...AN AREA OF MODERATE TO HEAVY RAIN OVER WESTERN NEW 
JERSEY IS EXPECTED TO TRACK NORTHEAST OVER THE REGION THROUGH 11 PM. 

BETWEEN 1 TO 2 INCHES OF RAIN HAS FALLEN ACROSS WESTERN 
PASSAIC...SOUTHEASTERN ORANGE AND EXTREME SOUTHWESTERN ROCKLAND 
COUNTIES SINCE 5 PM...WITH LESSER AMOUNTS TO THE SOUTHEAST. 

ALTHOUGH THE INTENSITY OF THE RAINFALL HAS WEAKENED...UP TO AN 
ADDITIONAL 1/2 TO 1 INCH OF RAIN IS STILL EXPECTED THROUGH 11 PM. 
EXCESSIVE RUNOFF FROM THIS ADDITIONAL 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4119 7438 4121 7440 4138 7410 4114 7390
      4095 7428 4097 7428 4099 7431 4101 7443
      4104 7444 4104 7447 4102 7448 4103 7450
      4107 7450 4108 7451

$$

NV

806 
WGUS71 KOKX 060255
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1055 PM EDT MON SEP 5 2011

NJC003-031-NYC071-087-060300-
/O.CAN.KOKX.FF.W.0036.000000T0000Z-110906T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERGEN NJ-ORANGE NY-ROCKLAND NY-PASSAIC NJ-
1055 PM EDT MON SEP 5 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR PASSAIC...
ROCKLAND...SOUTH CENTRAL ORANGE AND NORTHWESTERN BERGEN COUNTIES...

THE WARNING HAS BEEN CANCELLED AS THE HEAVIEST RAIN HAS MOVED 
NORTHEAST OF THE REGION. BETWEEN 1 1/2 AND 2 1/2 INCHES OF RAIN HAS 
FALLEN ACROSS THE REGION...AND WITH BANDS OF MODERATE TO HEAVY RAIN 
EXPECTED OVERNIGHT ADDITIONAL FLOODING IS POSSIBLE. 

AN URBAN AND SMALL STREAM FLOOD ADVISORY WILL BE ISSUED TO ADDRESS 
THIS THREAT. BE PREPARED TO TAKE ACTION THOUGH IF THE FLOODING 
THREAT INCREASES AND A WARNING IS ISSUED.

LAT...LON 4119 7438 4121 7440 4138 7410 4114 7390
      4095 7428 4097 7428 4099 7431 4101 7443
      4104 7444 4104 7447 4102 7448 4103 7450
      4107 7450 4108 7451

$$

NV

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 12:29 AM EDT	Special Weather Statement	OKX	Passaic	61 min
Sep 5, 4:23 AM EDT	Flash Flood Watch	OKX	Bergen, Essex, Hudson, Passaic, Union	35 hr
Sep 5, 1:12 PM EDT	Special Weather Statement	OKX	Bergen, Essex, Passaic	108 min
Sep 5, 5:28 PM EDT	Areal Flood Advisory	OKX	Bergen, Passaic	107 min
Sep 5, 7:09 PM EDT	Areal Flood Advisory	OKX	Bergen, Passaic	4 hr
Sep 5, 5:42 AM EDT	Rip Current Statement	OKX	Kings, Nassau, Queens, Suffolk	46 hr
Sep 5, 3:57 PM EDT	Small Craft Advisory	OKX		4 days
Sep 5, 4:31 PM EDT	Areal Flood Advisory	OKX	Orange	3 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.