Alert archive / New Jersey / Areal Flood Warnings in 2012

Areal Flood Warning 24, NWS Philadelphia/Mount Holly

September 4, 2012Burlington County, Camden County, Gloucester County, New Jersey; Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 4, 2012, 7:01 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 55 min. 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 4, 2012, 7:01 PM EDT (23:01 UTC)
Expired
Sep 4, 2012, 7:56 PM EDT
In force
55 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 23:03 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.0 hours before the alert went out and 103 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, Phillips Aaf/Abe, MD at 12:00Z on 2012-09-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 869 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2012-09-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.1939Sfc1 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
869 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
600 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

582 
WGUS41 KPHI 042301
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
701 PM EDT TUE SEP 4 2012

NJC005-007-015-PAC101-050200-
/O.NEW.KPHI.FA.W.0024.120904T2301Z-120905T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-PHILADELPHIA PA-GLOUCESTER NJ-BURLINGTON NJ-
701 PM EDT TUE SEP 4 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTH CENTRAL GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 1000 PM EDT

* AT 700 PM EDT DOPPLER RADAR INDICATED ONE TO TWO INCHES HAS FALLEN 
IN THE LAST HOUR ACROSS THE AREA. ADDITIONALLY...THE PENNYPACK CREEK 
HAS EXCEEDED ITS FLOOD STAGE. 

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED LEVELS ON
SMALL CREEKS AND STREAMS...AND PONDING OF WATER IN URBAN AREAS...
HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER POOR DRAINAGE
AREAS AND LOW LYING SPOTS.

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.

&&

LAT...LON 3979 7524 3985 7525 3987 7521 3988 7526
      3994 7524 3996 7525 4006 7514 4006 7509
      4008 7508 4013 7502 4012 7496 4009 7495
      4005 7498 4007 7491 4002 7484

$$

ROBERTSON
1 follow-up statement
193 
WGUS81 KPHI 042356
FLSPHI

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
756 PM EDT TUE SEP 4 2012

NJC005-007-015-PAC101-050006-
/O.CAN.KPHI.FA.W.0024.000000T0000Z-120905T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-PHILADELPHIA PA-GLOUCESTER NJ-BURLINGTON NJ-
756 PM EDT TUE SEP 4 2012

...THE FLOOD WARNING HAS BEEN CANCELLED FOR URBAN AREAS AND SMALL
STREAMS IN NORTHWESTERN BURLINGTON...NORTH CENTRAL GLOUCESTER...
PHILADELPHIA AND NORTHWESTERN CAMDEN COUNTIES...

LAT...LON 3979 7524 3985 7525 3987 7521 3988 7526
      3994 7524 3996 7525 4006 7514 4006 7509
      4008 7508 4013 7502 4012 7496 4009 7495
      4005 7498 4007 7491 4002 7484

$$

HEAVENER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 9:28 PM EDTAreal Flood AdvisoryPHIBurlington, Ocean3 hr
Sep 4, 12:05 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Monmouth, Ocean4 hr
Sep 4, 1:25 AM EDTAreal Flood AdvisoryPHIBurlington, Mercer, Middlesex, Monmouth, Ocean, Somerset4 hr
Sep 4, 1:34 AM EDTFlash Flood WarningPHIBurlington, Ocean6 hr
Sep 4, 1:55 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Gloucester4 hr
Sep 4, 3:41 AM EDTAreal Flood AdvisoryPHIBurlington, Camden2 hr
Sep 4, 3:48 AM EDTAreal Flood AdvisoryPHIOcean3 hr
Sep 4, 4:44 AM EDTAreal Flood AdvisoryPHIOcean2 hr
Sep 4, 4:55 AM EDTSmall Craft AdvisoryPHI47 hr
Sep 4, 6:47 AM EDTAreal Flood WarningPHIBurlington, Ocean3 hr
Sep 4, 12:08 PM EDTAreal Flood WarningPHIAtlantic, Burlington, Camden, Mercer, Middlesex, Monmouth and 2 more4 hr
Sep 4, 12:15 PM EDTAreal Flood WarningPHIAtlantic, Camden, Cumberland, Gloucester, Salem106 min
Sep 4, 12:39 PM EDTRip Current StatementPHIAtlantic, Cape May, Monmouth, Ocean56 hr
Sep 4, 1:13 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean62 min
Sep 4, 1:36 PM EDTFlash Flood WarningPHIMonmouth, Ocean4 hr
Sep 4, 1:47 PM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester, Mercer3 hr
Sep 4, 1:58 PM EDTSpecial Weather StatementPHIBurlington62 min
Sep 4, 2:11 PM EDTSpecial Weather StatementPHIMonmouth34 min
Sep 4, 2:22 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Somerset, Warren4 hr
Sep 4, 2:59 PM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset, Warren61 min
Sep 4, 3:13 PM EDTTornado WarningPHIBurlington, Ocean32 min
Sep 4, 3:40 PM EDTAreal Flood AdvisoryPHIHunterdon, Middlesex, Morris, Somerset, Sussex, Warren4 hr
Sep 4, 4:13 PM EDTAreal Flood AdvisoryPHIBurlington, Monmouth, Ocean54 min
Sep 4, 4:37 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Salem3 hr
Sep 4, 6:02 PM EDTAreal Flood WarningPHIBurlington16 hr
Sep 4, 6:10 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester65 min
Sep 4, 6:30 PM EDTTornado WarningPHIBurlington, Camden30 min
Sep 4, 7:06 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Sussex, Warren114 min
Sep 4, 7:15 PM EDTSpecial Weather StatementPHIMercer60 min
Sep 4, 7:33 PM EDTFlash Flood WarningPHIWarren6 hr
Sep 4, 12:13 AM EDTAreal Flood AdvisoryPHIChester111 min
Sep 4, 4:00 AM EDTFlash Flood WarningPHIBucks, Montgomery, Philadelphia84 min
Sep 4, 3:11 PM EDTRiver Flood WarningPHIDelaware50 min
Sep 4, 3:32 PM EDTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh, Monroe, Northampton4 hr
Sep 4, 5:22 PM EDTSpecial Weather StatementPHIPhiladelphia53 min
Sep 4, 6:34 PM EDTSpecial Weather StatementPHILehigh56 min

Nearby

Areal Flood Warnings in New Jersey, 2012Areal Flood Warnings in Pennsylvania, 2012Every areal 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.