Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 12, NWS New York, NY

July 8, 2011Rockland County, New York; Bergen County, Passaic County, New Jersey

NWS New York, NY issued this flash flood warning at Jul 8, 2011, 5:08 PM EDT for Rockland County, New York; Bergen County, Passaic County, New Jersey. It was in force for 3 hr. 3 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: Jul 8, 2011, 5:08 PM EDT (21:08 UTC)
Expired: Jul 8, 2011, 8:06 PM EDT
In force: 3 hr
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 Philadelphia radar (KDIX), 121 km from the middle of the area, began a volume at 21:09 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
Jul 8, 5:19 PM EDT	FLASH FLOOD	Mahwah, NJ	CAR STRANDED IN THREE FEET OF WATER ON ROUTE 202 IN MAHWAH.
Jul 8, 5:20 PM EDT	FLASH FLOOD	Upper Saddle River, NJ	LAKE STREET BETWEEN EAST AND WEST SADDLE RIVER ROAD CLOSED DUE TO FLOODING.
Jul 8, 7:30 PM EDT	FLASH FLOOD	Saddle River, NJ	ALLENDALE ROAD BETWEEN EAST AND WEST SADDLE RIVER ROAD CLOSED DUE TO FLOODING.

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, 9.1 hours before the alert went out and 124 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: 745 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

460 
WGUS51 KOKX 082108
FFWOKX
NJC003-031-NYC087-082300-
/O.NEW.KOKX.FF.W.0012.110708T2108Z-110708T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
508 PM EDT FRI JUL 8 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...
  NORTHERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...

* UNTIL 700 PM EDT...

* AT 503 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM A CLUSTER OF THUNDERSTORMS OVER THE WARNED     
  AREA.

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.

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 7439 4109 7410 4115 7392 4092 7401
      4089 7428 4092 7429 4097 7428 4099 7431
      4101 7443 4104 7444 4104 7447 4102 7448
      4103 7450 4108 7451

$$

DSW

3 follow-up statements

232 
WGUS71 KOKX 082214
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
614 PM EDT FRI JUL 8 2011

NJC003-031-NYC087-082300-
/O.CON.KOKX.FF.W.0012.000000T0000Z-110708T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERGEN NJ-ROCKLAND NY-PASSAIC NJ-
614 PM EDT FRI JUL 8 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
PASSAIC...ROCKLAND AND NORTHERN BERGEN COUNTIES...

AT 608 PM EDT...AREAS OF SHOWERS WITH EMBEDDED THUNDERSTORMS 
CONTINUE TO MOVE ACROSS THE AREA. WHILE RAINFALL RATES HAVE 
DIMINISHED...CONTINUED RUNOFF AND AN ADDITIONAL ONE-HALF INCH OF 
RAINFALL WILL CONTINUE TO PRODUCE FLOODING OF LOW-LYING AREAS AS 
WELL AS STREAMS AND CREEKS RISING ABOVE BANKFULL.

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.

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 4119 7439 4109 7410 4115 7392 4092 7401
      4089 7428 4092 7429 4097 7428 4099 7431
      4101 7443 4104 7444 4104 7447 4102 7448
      4103 7450 4108 7451

$$

DSW

116 
WGUS51 KOKX 082253
FFWOKX
NJC003-031-NYC087-090100-
/O.EXT.KOKX.FF.W.0012.000000T0000Z-110709T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
653 PM EDT FRI JUL 8 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS EXTENDED THE

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

* UNTIL 900 PM EDT...

* AT 647 PM EDT...AREAS OF SHOWERS WITH EMBEDDED THUNDERSTORMS       
  CONTINUE TO MOVE ACROSS THE AREA. WHILE RAINFALL RATES HAVE        
  DIMINISHED...CONTINUED RUNOFF AND AN ADDITIONAL ONE-HALF INCH OF   
  RAINFALL WILL CONTINUE TO PRODUCE FLOODING OF LOW-LYING AREAS AS   
  WELL AS SOME STREAMS AND CREEKS EXCEEDING BANKFULL. 

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 7439 4109 7410 4115 7392 4092 7401
      4089 7428 4092 7429 4097 7428 4099 7431
      4101 7443 4104 7444 4104 7447 4102 7448
      4103 7450 4108 7451

$$

DSW

220 
WGUS71 KOKX 090006
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
806 PM EDT FRI JUL 8 2011

NJC003-031-NYC087-090013-
/O.CAN.KOKX.FF.W.0012.000000T0000Z-110709T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERGEN NJ-ROCKLAND NY-PASSAIC NJ-
806 PM EDT FRI JUL 8 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR PASSAIC...ROCKLAND
AND NORTHERN BERGEN COUNTIES...

SHOWERS AND EMBEDDED THUNDERSTORMS WILL CONTINUE TO TRACK ACROSS THE 
AREA THIS EVENING. WHILE RAINFALL RATES HAVE  LESSENED...THE HEAVY 
RAINFALL FROM EARLIER THIS EVENING COMBINED WITH CONTINUED RUNOFF 
WILL PRODUCE MINOR FLOODING ALONG RIVERS...STREAMS AND POOR DRAINAGE 
AREAS.


LAT...LON 4119 7439 4109 7410 4115 7392 4092 7401
      4089 7428 4092 7429 4097 7428 4099 7431
      4101 7443 4104 7444 4104 7447 4102 7448
      4103 7450 4108 7451

$$

DSW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 2:37 PM EDT	Special Weather Statement	OKX	Orange, Putnam	53 min
Jul 8, 2:53 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Putnam, Rockland, Westchester	67 min
Jul 8, 3:18 PM EDT	Flash Flood Warning	OKX	Orange, Putnam, Rockland, Westchester	4 hr
Jul 8, 3:39 PM EDT	Special Weather Statement	OKX	Orange	66 min
Jul 8, 3:48 PM EDT	Severe Thunderstorm Warning	OKX	Orange	26 min
Jul 8, 4:06 PM EDT	Special Weather Statement	OKX	Rockland	54 min
Jul 8, 4:09 PM EDT	Severe Thunderstorm Warning	OKX	Rockland, Westchester	51 min
Jul 8, 4:21 PM EDT	Flash Flood Watch	OKX	Bronx, Kings, New York, Orange, Putnam, Queens and 3 more	7 hr
Jul 8, 4:31 PM EDT	Areal Flood Advisory	OKX	Rockland	119 min
Jul 8, 5:02 PM EDT	Special Weather Statement	OKX	Rockland	58 min
Jul 8, 5:15 PM EDT	Severe Thunderstorm Warning	OKX	Rockland, Westchester	26 min
Jul 8, 3:57 PM EDT	Areal Flood Advisory	OKX	Essex, Union	108 min
Jul 8, 4:01 PM EDT	Special Weather Statement	OKX	Passaic	59 min
Jul 8, 4:22 PM EDT	Special Weather Statement	OKX	Essex, Passaic, Union	38 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.