Alert archive / New Jersey / Flash Flood Warnings in 2009

Flash Flood Warning 35, NWS Philadelphia/Mount Holly

August 12, 2009Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 12, 2009, 4:16 PM EDT for Cumberland County, Salem County, New Jersey. It was in force for 6 hr. 1 report 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 12, 2009, 4:16 PM EDT (20:16 UTC)
Expired
Aug 12, 2009, 10:15 PM EDT
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 63 km from the middle of the area, began a volume at 20:16 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

TimeReportWhereRemark
Aug 12, 4:45 PM EDTFLASH FLOODBridgeton, NJFIRE DEPT PUMPING OUT COURT BUILDING ON 54 W. BOARD STREET.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 67 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 2009-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 402 joules per kilogram.LCLLFCEL10008507005003002001001 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, Phillips Aaf/Abe, MD at 12:00Z on 2009-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
402 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
1048 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 122016
FFWPHI
NJC011-033-130015-
/O.NEW.KPHI.FF.W.0035.090812T2016Z-090813T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
416 PM EDT WED AUG 12 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 815 PM EDT

* AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
SLOW MOVING THUNDERSTORMS WITH TORRENTIAL RAIN ACROSS PORTIONS OF 
THE WARNED AREA. RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE 
POSSIBLE WITH RAINFALL RATES APPROACHING SIX INCHES PER HOUR.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SEABROOK
  FARMS...ROSENHAYN AND OLIVET

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 

&&

LAT...LON 3929 7532 3934 7534 3933 7537 3936 7540
      3937 7541 3937 7542 3939 7545 3941 7547
      3961 7513 3949 7497

$$

KRUZDLO
2 follow-up statements
000 
WGUS51 KPHI 122341
FFWPHI
NJC011-033-130215-
/O.EXT.KPHI.FF.W.0035.000000T0000Z-090813T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
741 PM EDT WED AUG 12 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 1015 PM EDT

* AT 739 PM EDT...FLOODING WAS STILL ONGOING IN BRIDGETON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. 

&&

LAT...LON 3929 7532 3934 7534 3933 7537 3936 7540
      3937 7541 3937 7542 3939 7545 3941 7547
      3961 7513 3949 7497

$$

KRUZDLO
000 
WGUS71 KPHI 130211
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1011 PM EDT WED AUG 12 2009

NJC011-033-130220-
/O.EXP.KPHI.FF.W.0035.000000T0000Z-090813T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SALEM NJ-CUMBERLAND NJ-
1011 PM EDT WED AUG 12 2009

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1015 PM EDT FOR
NORTHWESTERN CUMBERLAND AND SOUTHEASTERN SALEM COUNTIES...

EMERGENCY MANAGEMENT OFFICIALS IN CUMBERLAND COUNTY REPORT THAT 
FLOOD WATERS HAVE RECEDED, AND FURTHER FLOODING IS NOT EXPECTED.

LAT...LON 3929 7532 3934 7534 3933 7537 3936 7540
      3937 7541 3937 7542 3939 7545 3941 7547
      3961 7513 3949 7497

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 12:04 PM EDTAreal Flood AdvisoryPHIMercer60 min
Aug 12, 12:47 PM EDTFlash Flood WarningPHIMercer3 hr
Aug 12, 1:26 PM EDTSevere Thunderstorm WarningPHIOcean22 min
Aug 12, 2:55 PM EDTAreal Flood AdvisoryPHIMonmouth, Ocean50 min
Aug 12, 3:01 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland59 min
Aug 12, 3:17 PM EDTFlash Flood WarningPHIAtlantic, Cumberland4 hr
Aug 12, 3:29 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester60 min
Aug 12, 3:32 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Ocean118 min
Aug 12, 4:01 PM EDTFlash Flood WarningPHIAtlantic, Cape May3 hr
Aug 12, 4:55 PM EDTFlash Flood WarningPHISalem3 hr
Aug 12, 5:13 PM EDTAreal Flood AdvisoryPHICape May, Cumberland2 hr
Aug 12, 6:03 PM EDTAreal Flood AdvisoryPHISussex4 hr

Nearby

Flash Flood Warnings in New Jersey, 2009Every flash flood warning in 2009

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.