Alert archive / New York / Flash Flood Warnings in 2012

Flash Flood Warning 8, NWS New York, NY

July 18, 20125 counties in New York

NWS New York, NY issued this flash flood warning at Jul 18, 2012, 4:34 PM EDT for 5 counties in New York. It was in force for 116 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: Jul 18, 2012, 4:34 PM EDT (20:34 UTC)
Expired: Jul 18, 2012, 6:30 PM EDT
In force: 116 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

Counties Bronx County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Queens County, NY

The radar

The Brookhaven radar (KOKX), 78 km from the middle of the area, began a volume at 20:35 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 18, 4:45 PM EDT	FLASH FLOOD	1 Ese Woodside Houses, NY	2 LANES BLOCKED ON EASTBOUND BQE AT NORTHERN BLVD
Jul 18, 5:00 PM EDT	FLASH FLOOD	1 Ssw Glen Head, NY	CAR STUCK IN WATER AT GLEN COVE AND EDGEWOOD DRIVES
Jul 18, 5:20 PM EDT	FLASH FLOOD	Steinway, NY	FLOODING ON EASTBOUND GRAND CENTRAL PKWY AT BQE EXIT
Jul 18, 5:40 PM EDT	FLASH FLOOD	Old Brookville, NY	WATER COVERING ROAD AT CHICKEN VALLEY AND CEDAR SWAMP RDS

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, 8.6 hours before the alert went out and 78 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: 2129 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1491 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 95 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.

811 
WGUS51 KOKX 182034
FFWOKX
NYC005-047-059-061-081-182230-
/O.NEW.KOKX.FF.W.0008.120718T2034Z-120718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
434 PM EDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  QUEENS COUNTY IN SOUTHEAST NEW YORK...
  NORTHERN NASSAU COUNTY IN SOUTHEAST NEW YORK...
  NEW YORK (MANHATTAN) COUNTY IN SOUTHEAST NEW YORK...
  BRONX COUNTY IN SOUTHEAST NEW YORK...
  KINGS (BROOKLYN) COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 630 PM EDT...

* AT 429 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS TRAINING OVER THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP 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 4069 7401 4070 7403 4070 7404 4084 7396
      4086 7390 4089 7386 4088 7377 4084 7376
      4087 7373 4087 7368 4085 7366 4088 7366
      4091 7364 4092 7352 4088 7347 4070 7344
      4067 7403

$$

MPS

2 follow-up statements

200 
WGUS71 KOKX 182103
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
503 PM EDT WED JUL 18 2012

NYC005-047-059-061-081-182230-
/O.CON.KOKX.FF.W.0008.000000T0000Z-120718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KINGS (BROOKLYN) NY-BRONX NY-NEW YORK (MANHATTAN) NY-NASSAU NY-
QUEENS NY-
503 PM EDT WED JUL 18 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR
QUEENS...NORTHERN NASSAU...NEW YORK (MANHATTAN)...BRONX AND KINGS
(BROOKLYN) COUNTIES...

AT 456 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH 
FLOODING OVER NUMEROUS ROADS AND HIGHWAYS OVER THE WARNED AREA. 
BETWEEN 1 AND 1.5 INCHES OF RAIN HAS FALLEN OVER THE LAST HOUR... 
AND AN ADDITIONAL 1 TO 1.5 INCHES OF RAIN IS LIKELY TO FALL OVER THE 
NEXT HOUR AS THUNDERSTORMS TRAIN 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.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP 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 4069 7401 4070 7403 4070 7404 4084 7396
      4086 7390 4089 7386 4088 7377 4084 7376
      4087 7373 4087 7368 4085 7366 4088 7366
      4091 7364 4092 7352 4088 7347 4070 7344
      4067 7403

$$

MPS

007 
WGUS71 KOKX 182221
FFSOKX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
621 PM EDT WED JUL 18 2012

NYC005-047-059-061-081-182230-
/O.EXP.KOKX.FF.W.0008.000000T0000Z-120718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KINGS (BROOKLYN) NY-BRONX NY-NEW YORK (MANHATTAN) NY-NASSAU NY-
QUEENS NY-
621 PM EDT WED JUL 18 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM EDT FOR QUEENS...
NORTHERN NASSAU...NEW YORK (MANHATTAN)...BRONX AND KINGS (BROOKLYN)
COUNTIES...

THE HEAVIEST RAIN HAS MOVED SOUTH AND EAST OF THE WARNED AREA. 
ADDITIONAL LIGHT TO MODERATE RAIN WILL CREATE CONDITIONS THAT WILL 
MAKE IT SLOW FOR WATER ON FLOODED ROADS TO SUBSIDE THROUGH THIS 
EVENING.

LAT...LON 4069 7401 4070 7403 4070 7404 4084 7396
      4086 7390 4089 7386 4088 7377 4084 7376
      4087 7373 4087 7368 4085 7366 4088 7366
      4091 7364 4092 7352 4088 7347 4070 7344
      4067 7403

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 12:33 PM EDT	Severe Thunderstorm Warning	OKX	Westchester	42 min
Jul 18, 12:36 PM EDT	Special Marine Warning	OKX		39 min
Jul 18, 12:39 PM EDT	Areal Flood Advisory	OKX	Westchester	81 min
Jul 18, 1:12 PM EDT	Special Marine Warning	OKX		63 min
Jul 18, 1:12 PM EDT	Severe Thunderstorm Warning	OKX	Orange	63 min
Jul 18, 1:15 PM EDT	Areal Flood Advisory	OKX	Orange	90 min
Jul 18, 1:19 PM EDT	Areal Flood Advisory	OKX	Bronx, Nassau, Queens	69 min
Jul 18, 1:19 PM EDT	Special Weather Statement	OKX	Bronx	56 min
Jul 18, 2:00 PM EDT	Areal Flood Advisory	OKX	Putnam, Rockland, Westchester	2 hr
Jul 18, 2:26 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	64 min
Jul 18, 2:36 PM EDT	Areal Flood Advisory	OKX	Orange	84 min
Jul 18, 2:50 PM EDT	Special Marine Warning	OKX		40 min
Jul 18, 2:55 PM EDT	Areal Flood Advisory	OKX	Westchester	72 min
Jul 18, 2:57 PM EDT	Severe Thunderstorm Warning	OKX	Westchester	33 min
Jul 18, 2:59 PM EDT	Special Marine Warning	OKX		61 min
Jul 18, 3:23 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Suffolk	52 min
Jul 18, 3:35 PM EDT	Special Marine Warning	OKX		25 min
Jul 18, 3:54 PM EDT	Special Weather Statement	OKX	Bronx, New York	66 min
Jul 18, 3:59 PM EDT	Special Marine Warning	OKX		46 min
Jul 18, 4:10 PM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more	2 hr
Jul 18, 4:15 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Queens, Suffolk	60 min
Jul 18, 4:41 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Kings, New York, Queens	49 min
Jul 18, 5:08 PM EDT	Special Marine Warning	OKX		52 min
Jul 18, 7:00 PM EDT	Special Marine Warning	OKX		45 min
Jul 18, 7:09 PM EDT	Special Marine Warning	OKX		66 min
Jul 18, 7:58 PM EDT	Special Marine Warning	OKX		47 min

Nearby

Flash Flood Warnings in New York, 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.