Alert archive / New York / Flash Flood Warnings in 2012

Flash Flood Warning 11, NWS New York, NY

July 28, 20124 counties in New York; Bergen County, Passaic County, New Jersey

NWS New York, NY issued this flash flood warning at Jul 28, 2012, 2:40 PM EDT for 4 counties in New York; Bergen County, Passaic County, New Jersey. It was in force for 3 hr. 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: Jul 28, 2012, 2:40 PM EDT (18:40 UTC)
Expired: Jul 28, 2012, 5:32 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, Orange County, NY, Putnam County, NY, Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 116 km from the middle of the area, began a volume at 18:44 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 28, 3:55 PM EDT	FLASH FLOOD	1 Nne Wayne, NJ	BERDAN AVE AT HAMBURG TPK IMPASSABLE DUE TO FLOOD
Jul 28, 4:15 PM EDT	FLASH FLOOD	Ho-Ho-Kus, NJ	RACE TRACK RD AT RTE 17 SOUTH CLOSED DUE TO FLOODING
Jul 28, 4:29 PM EDT	FLASH FLOOD	Glen Rock, NJ	PERSON TRAPPED IN CAR DUE TO FLOOD WATERS NEAR INTERSECTION OF MAPLE AVE AND GLEN AVE
Jul 28, 4:45 PM EDT	FLASH FLOOD	1 Sse Ridgewood, NJ	SPRING AVE AND S IRVING ST IMPASSABLE 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, 6.7 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-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: 424 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 705 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

692 
WGUS51 KOKX 281840
FFWOKX
NJC003-031-NYC071-079-087-119-282145-
/O.NEW.KOKX.FF.W.0011.120728T1840Z-120728T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
240 PM EDT SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 545 PM EDT...

* AT 235 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM AN AREA OF THUNDERSTORMS OVER THE WARNED AREA.
RAINFALL RATES OF OVER TWO INCHES PER HOUR ARE EXPECTED WITH THIS 
ACTIVITY...RESULTING IN FLASH FLOODING ACROSS PORTIONS OF THE WARNED 
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4109 7450 4120 7437 4127 7450 4138 7399
      4145 7399 4149 7393 4150 7377 4113 7371
      4109 7372 4107 7371 4091 7428 4097 7429
      4099 7430 4103 7442 4102 7443 4105 7445
      4104 7450

$$

PW

2 follow-up statements

218 
WGUS71 KOKX 282042
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
442 PM EDT SAT JUL 28 2012

NJC003-031-NYC071-079-087-119-282145-
/O.CON.KOKX.FF.W.0011.000000T0000Z-120728T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE NY-PUTNAM NY-ROCKLAND NY-BERGEN NJ-WESTCHESTER NY-PASSAIC NJ-
442 PM EDT SAT JUL 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR
PASSAIC...WESTCHESTER...NORTHERN BERGEN...ROCKLAND...PUTNAM AND
SOUTHEASTERN ORANGE COUNTIES...

AT 436 PM EDT...ADDITIONAL SHOWERS AND EMBEDDED THUNDERSTORMS WILL 
CONTINUE. HOWEVER THE MAIN AREA OF HEAVY RAIN HAS MOVED EAST. 
LINGERING FLOODING CAN STILL BE EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY
AND SOUTHEAST NEW YORK.

&&

LAT...LON 4109 7450 4120 7437 4127 7450 4138 7399
      4145 7399 4149 7393 4150 7377 4113 7371
      4109 7372 4107 7371 4091 7428 4097 7429
      4099 7430 4103 7442 4102 7443 4105 7445
      4104 7450

$$

PW

222 
WGUS71 KOKX 282132
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
532 PM EDT SAT JUL 28 2012

NJC003-031-NYC071-079-087-119-282141-
/O.CAN.KOKX.FF.W.0011.000000T0000Z-120728T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE NY-PUTNAM NY-ROCKLAND NY-BERGEN NJ-WESTCHESTER NY-PASSAIC NJ-
532 PM EDT SAT JUL 28 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR PASSAIC...
WESTCHESTER...NORTHERN BERGEN...ROCKLAND...PUTNAM AND SOUTHEASTERN
ORANGE COUNTIES...

THE HEAVIER SHOWERS AND THUNDERSTORMS HAVE MOVED EAST OF THE WARNED 
AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY
AND SOUTHEAST NEW YORK.

LAT...LON 4109 7450 4120 7437 4127 7450 4138 7399
      4145 7399 4149 7393 4150 7377 4113 7371
      4109 7372 4107 7371 4091 7428 4097 7429
      4099 7430 4103 7442 4102 7443 4105 7445
      4104 7450

$$

PW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 8:41 AM EDT	Areal Flood Advisory	OKX	Nassau	2 hr
Jul 28, 8:43 AM EDT	Areal Flood Advisory	OKX	Suffolk	2 hr
Jul 28, 8:49 AM EDT	Areal Flood Advisory	OKX	Suffolk	116 min
Jul 28, 12:16 PM EDT	Areal Flood Advisory	OKX	Orange, Putnam	59 min
Jul 28, 12:47 PM EDT	Flash Flood Warning	OKX	Orange	3 hr
Jul 28, 1:03 PM EDT	Special Weather Statement	OKX	Orange	42 min
Jul 28, 1:08 PM EDT	Severe Thunderstorm Warning	OKX	Orange	37 min
Jul 28, 1:25 PM EDT	Areal Flood Advisory	OKX	Putnam	95 min
Jul 28, 1:48 PM EDT	Special Weather Statement	OKX	Putnam	57 min
Jul 28, 1:54 PM EDT	Special Weather Statement	OKX	Orange, Rockland	66 min
Jul 28, 1:58 PM EDT	Areal Flood Advisory	OKX	Orange, Putnam, Rockland, Westchester	92 min
Jul 28, 2:20 PM EDT	Areal Flood Advisory	OKX	Westchester	85 min
Jul 28, 2:44 PM EDT	Flash Flood Warning	OKX	Putnam, Westchester	3 hr
Jul 28, 2:58 PM EDT	Special Marine Warning	OKX		47 min
Jul 28, 3:17 PM EDT	Areal Flood Advisory	OKX	Westchester	58 min
Jul 28, 4:00 PM EDT	Flash Flood Warning	OKX	Bronx, Kings, Nassau, New York, Queens, Westchester	112 min
Jul 28, 5:04 PM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	116 min
Jul 28, 6:43 PM EDT	Special Weather Statement	OKX	Orange	62 min
Jul 28, 3:35 PM EDT	Flash Flood Warning	OKX	Bergen, Essex, Passaic	115 min

Nearby

Flash Flood Warnings in New York, 2012 Flash Flood Warnings in New Jersey, 2012 Every flash flood warning in 2012

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.