Alert archive / New Jersey / Flash Flood Warnings in 2011

Flash Flood Warning 43, NWS Philadelphia/Mount Holly

August 27, 2011New Castle County, Delaware; 5 counties in Pennsylvania; 12 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 27, 2011, 11:37 PM EDT for New Castle County, Delaware; 5 counties in Pennsylvania; 12 counties in New Jersey. It was in force for 12 hr. 2 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 27, 2011, 11:37 PM EDT (03:37 UTC)
Expired
Aug 28, 2011, 11:30 AM EDT
In force
12 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties New Castle County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ, Somerset County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

What was reported inside it

TimeReportWhereRemark
Aug 28, 7:00 AM EDTFLOODHightstown, NJPEDDIE LAKE OUT OF ITS BANKS. MAJOR FLOODING IN DOWNTOWN HIGHTSTOWN.
Aug 28, 8:12 AM EDTFLOODGlendora, NJBIG TIMBER CREEK FLOODED ONTO CHEEWS LANDING AND LOWER LANDING ROADS

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 00:00Z, 3.6 hours before the alert went out and 182 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-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2011-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 957 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2011-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
957 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
466 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
269 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.

238 
WGUS51 KPHI 280337
FFWPHI
DEC003-NJC001-005-007-009-011-015-019-021-023-025-029-035-PAC017-029-
045-091-101-280930-
/O.NEW.KPHI.FF.W.0043.110828T0337Z-110828T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1137 PM EDT SAT AUG 27 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HUNTERDON COUNTY...
  SOMERSET COUNTY...
  NORTHEASTERN CUMBERLAND COUNTY...
  CAMDEN COUNTY...
  GLOUCESTER COUNTY...
  MERCER COUNTY...
  MIDDLESEX COUNTY...
  DELAWARE COUNTY...
  PHILADELPHIA COUNTY...
  CHESTER COUNTY...
  MONTGOMERY COUNTY...
  BUCKS COUNTY...
  MONMOUTH COUNTY...
  NORTHERN NEW CASTLE COUNTY...
  NORTHEASTERN CAPE MAY COUNTY...
  OCEAN COUNTY...
  ATLANTIC COUNTY...
  BURLINGTON COUNTY...

* UNTIL 530 AM EDT...

* AT 1130 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM HURRICANE IRENE OVER PORTIONS OF ATLANTIC...
  BUCKS...BURLINGTON...CAMDEN...CHESTER...DELAWARE...GLOUCESTER...
  HUNTERDON...MERCER...MIDDLESEX...MONMOUTH...MONTGOMERY...
  NORTHEASTERN CAPE MAY...NORTHEASTERN CUMBERLAND...NORTHERN NEW
  CASTLE...OCEAN...PHILADELPHIA AND SOMERSET COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ATLANTIC
  CITY...CAMDEN...NEW BRUNSWICK...PERTH AMBOY...SOMERVILLE...TOMS
  RIVER...TRENTON...VINELAND...PHILADELPHIA...WEST CHESTER AND SANDY
  HOOK.

TWO TO FIVE INCHES OF RAIN HAVE ALREADY FALLEN ACROSS THE WARNED 
AREA. ADDITIONAL RAINFALL AMOUNTS OF ONE TO FOUR INCHES ARE EXPECTED 
THROUGH ABOUT 530 AM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3968 7412 3951 7426 3953 7440 3945 7429
      3912 7471 3974 7523 3978 7543 3974 7548
      3972 7615 3987 7601 4009 7595 4072 7492
      4057 7421 4057 7420 4055 7424 4045 7422
      4042 7399 4047 7401 4043 7396

$$

KRUZDLO
2 follow-up statements
314 
WGUS71 KPHI 280635
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
235 AM EDT SUN AUG 28 2011

DEC003-NJC001-005-007-009-011-015-019-021-023-025-029-035-PAC017-029-
045-091-101-280930-
/O.CON.KPHI.FF.W.0043.000000T0000Z-110828T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HUNTERDON NJ-SOMERSET NJ-CUMBERLAND NJ-CAMDEN NJ-GLOUCESTER NJ-
MERCER NJ-MIDDLESEX NJ-DELAWARE PA-PHILADELPHIA PA-CHESTER 
PA-MONTGOMERY PA-BUCKS PA-MONMOUTH NJ-NEW CASTLE DE-CAPE MAY 
NJ-OCEAN NJ-ATLANTIC NJ-BURLINGTON NJ-
235 AM EDT SUN AUG 28 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM EDT FOR
BURLINGTON...ATLANTIC...OCEAN...NORTHEASTERN CAPE MAY...NORTHERN NEW
CASTLE...MONMOUTH...BUCKS...MONTGOMERY...CHESTER...PHILADELPHIA...
DELAWARE...MIDDLESEX...MERCER...GLOUCESTER...CAMDEN...NORTHEASTERN
CUMBERLAND...SOMERSET AND HUNTERDON COUNTIES...

AT 218 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
BANDS OF VERY HEAVY RAIN FROM IRENE CONTINUING TO CIRCULATE AND   
REDEVELOP OVER SOUTHERN AND CENTRAL NEW JERSEY AS WELL AS 
SOUTHEASTERN PENNSYLVANIA. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ATLANTIC
CITY...CAMDEN...NEW BRUNSWICK...PERTH AMBOY...SOMERVILLE...TOMS
RIVER...TRENTON...PHILADELPHIA...WEST CHESTER AND SANDY HOOK.

THREE TO SEVEN INCHES OF RAIN HAVE ALREADY FALLEN ACROSS THE WARNED 
AREA. ADDITIONAL RAINFALL AMOUNTS OF TWO TO THREE INCHES ARE 
EXPECTED THROUGH ABOUT DAYBREAK.

FLOODING IS ALREADY EXTENSIVE AND WILL ONLY GET WORSE. IN NEW 
JERSEY, MAJOR FLOODING IS EXPECTED ALONG PORTIONS OF RANCOCAS CREEK. 
MAJOR FLOODING IS EXPECTED ALONG PORTIONS OF THE COOPER RIVER. 
RACCOON CREEK AT SWEDESBORO IS ABOVE FLOOD STAGE. THE NORTH BRANCH 
METEDECONK AT LAKEWOOD IS ABOVE FLOOD STAGE. THE MANASQUAN RIVER AT 
SQUANKUM IS ABOVE FLOOD STAGE. BIG BROOK IN MARLBORO IS RISING 
RAPIDLY AS IS STONEY BROOK IN PRINCETON. MAJOR FLOODING IS EXPECTED 
ALONG PORTIONS OF THE ASSUNPINK RIVER. IN PENNSYLVANIA, FRENCH 
CREEK AT PHOENIXVILLE IS ABOVE FLOOD STAGE. MAJOR FLOODING IS 
EXPECTED ALONG PORTIONS OF THE BRANDYWINE CREEK, CHESTER CREEK, 
VALLEY CREEK, CRUM CREEK, EAST BRANCH PERKIOMEN CREEK, FRANKFORD 
CREEK. RIDLEY CREEK IS RISING RAPIDLY. LITTLE NESHAMINY CREEK IS 
ABOVE FLOOD STAGE AS IS THE WISSAHICKON CREEK IN WISSAHICKON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE BY CALLING YOUR LOCAL
LAW ENFORCEMENT OFFICIALS OR BY CALLING THE NATIONAL WEATHER SERVICE
TOLL FREE AT...1-877-633-6772.

&&

LAT...LON 3968 7412 3951 7426 3953 7440 3945 7429
      3912 7471 3974 7523 3978 7543 3974 7548
      3972 7615 3987 7601 4009 7595 4072 7492
      4057 7421 4057 7420 4055 7424 4045 7422
      4042 7399 4047 7401 4043 7396

$$

KRUZDLO
898 
WGUS51 KPHI 280926
FFWPHI
DEC003-NJC001-005-007-009-011-015-019-021-023-025-029-035-PAC017-029-
045-091-101-281530-
/O.EXT.KPHI.FF.W.0043.000000T0000Z-110828T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
526 AM EDT SUN AUG 28 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  HUNTERDON COUNTY...
  SOMERSET COUNTY...
  NORTHEASTERN CUMBERLAND COUNTY...
  CAMDEN COUNTY...
  GLOUCESTER COUNTY...
  MERCER COUNTY...
  MIDDLESEX COUNTY...
  DELAWARE COUNTY...
  PHILADELPHIA COUNTY...
  CHESTER COUNTY...
  MONTGOMERY COUNTY...
  BUCKS COUNTY...
  MONMOUTH COUNTY...
  NORTHERN NEW CASTLE COUNTY...
  NORTHEASTERN CAPE MAY COUNTY...
  OCEAN COUNTY...
  ATLANTIC COUNTY...
  BURLINGTON COUNTY...

* UNTIL 1130 AM EDT...

* AT 518 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  BANDS OF VERY HEAVY RAIN FROM IRENE CONTINUING TO CIRCULATE OVER   
  SOUTHERN AND CENTRAL NEW JERSEY AS WELL AS SOUTHEASTERN            
  PENNSYLVANIA. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ATLANTIC
  CITY...CAMDEN...NEW BRUNSWICK...PERTH AMBOY...SOMERVILLE...TOMS
  RIVER...TRENTON...PHILADELPHIA...WEST CHESTER AND SANDY HOOK.

THREE TO EIGHT INCHES OF RAIN HAVE ALREADY FALLEN ACROSS THE WARNED 
AREA. ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE 
EXPECTED THROUGH ABOUT MIDDAY.

FLOODING IS EXTENSIVE. IN NEW JERSEY, MAJOR FLOODING IS EXPECTED 
ALONG PORTIONS OF RANCOCAS CREEK. MAJOR FLOODING IS EXPECTED ALONG 
PORTIONS OF THE COOPER RIVER. RACCOON CREEK AT SWEDESBORO IS ABOVE 
FLOOD STAGE. THE NORTH BRANCH METEDECONK AT LAKEWOOD IS ABOVE FLOOD 
STAGE. THE MANASQUAN RIVER AT SQUANKUM IS ABOVE FLOOD STAGE. BIG 
BROOK IN MARLBORO IS RISING RAPIDLY AS IS STONEY BROOK IN PRINCETON. 
MAJOR FLOODING IS EXPECTED ALONG PORTIONS OF THE ASSUNPINK RIVER. IN 
PENNSYLVANIA, FRENCH CREEK AT PHOENIXVILLE IS ABOVE FLOOD STAGE. 
MAJOR FLOODING IS EXPECTED ALONG PORTIONS OF THE BRANDYWINE CREEK, 
CHESTER CREEK, VALLEY CREEK, CRUM CREEK, EAST BRANCH PERKIOMEN 
CREEK, FRANKFORD CREEK. RIDLEY CREEK IS RISING RAPIDLY. LITTLE 
NESHAMINY CREEK IS ABOVE FLOOD STAGE AS IS THE WISSAHICKON CREEK IN 
WISSAHICKON. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.

&&

LAT...LON 3968 7412 3951 7426 3953 7440 3945 7429
      3912 7471 3974 7523 3978 7543 3974 7548
      3972 7615 3987 7601 4009 7595 4072 7492
      4057 7421 4057 7420 4055 7424 4045 7422
      4042 7399 4047 7401 4043 7396

$$

KRUZDLO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 27, 8:28 PM EDTFlash Flood WarningPHIKent, New Castle, Sussex12 hr
Aug 27, 8:33 PM EDTTornado WarningPHIKent, Sussex27 min
Aug 27, 8:49 PM EDTTornado WarningPHIKent26 min
Aug 27, 9:46 PM EDTTornado WarningPHINew Castle29 min
Aug 27, 10:14 PM EDTTornado WarningPHINew Castle31 min
Aug 28, 7:07 AM EDTAreal Flood WarningPHIKent, Sussex12 hr
Aug 28, 8:09 AM EDTAreal Flood WarningPHINew Castle12 hr
Aug 28, 11:07 AM EDTAreal Flood WarningPHINew Castle18 hr
Aug 28, 7:03 PM EDTAreal Flood WarningPHISussex22 hr
Aug 27, 9:29 PM EDTTornado WarningPHIDelaware31 min
Aug 27, 9:43 PM EDTAreal Flood WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton6 hr
Aug 27, 9:58 PM EDTRiver Flood WarningPHIMonroe, Northampton48 hr
Aug 27, 9:58 PM EDTRiver Flood WarningPHIMonroe, Northampton17 hr
Aug 27, 10:23 PM EDTTornado WarningPHIChester, Delaware, Montgomery, Philadelphia37 min
Aug 27, 10:36 PM EDTTornado WarningPHIBucks, Montgomery, Philadelphia24 min
Aug 27, 11:21 PM EDTAreal Flood WarningPHICarbon, Monroe6 hr
Aug 27, 11:22 PM EDTTornado WarningPHIBucks, Montgomery23 min
Aug 28, 3:50 AM EDTFlash Flood WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton10 hr
Aug 28, 5:17 AM EDTFlash Flood WarningPHICarbon, Monroe10 hr
Aug 28, 1:27 PM EDTAreal Flood WarningPHIBerks, Bucks, Lehigh, Montgomery, Northampton8 hr
Aug 28, 3:23 PM EDTAreal Flood WarningPHICarbon, Monroe8 hr
Aug 28, 6:47 PM EDTRiver Flood WarningPHILehigh2 hr
Aug 27, 8:41 PM EDTTornado WarningPHIAtlantic34 min
Aug 27, 9:03 PM EDTTornado WarningPHIBurlington, Ocean27 min
Aug 27, 9:08 PM EDTTornado WarningPHIAtlantic, Cape May, Cumberland37 min
Aug 27, 9:56 PM EDTSpecial Marine WarningPHI19 min
Aug 27, 10:08 PM EDTTornado WarningPHIBurlington, Ocean37 min
Aug 27, 10:11 PM EDTRiver Flood WarningPHIPassaic4 days
Aug 27, 10:56 PM EDTTornado WarningPHIMercer, Monmouth, Ocean34 min
Aug 27, 11:52 PM EDTSpecial Marine WarningPHI23 min
Aug 28, 12:55 AM EDTSpecial Weather StatementPHIAtlantic, Cumberland65 min
Aug 28, 2:40 AM EDTTornado WarningPHIMercer, Monmouth, Ocean35 min

Nearby

Flash Flood Warnings in New Jersey, 2011Flash Flood Warnings in Pennsylvania, 2011Flash Flood Warnings in Delaware, 2011Every 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.