Alert archive / New Jersey / Flash Flood Warnings in 2023

Flash Flood Warning 27, NWS Philadelphia/Mount Holly

July 4, 2023Burlington County, Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 4, 2023, 5:46 PM EDT for Burlington County, Camden County, New Jersey. It was in force for 3 hr. 8 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 4, 2023, 5:46 PM EDT (21:46 UTC)
Expired
Jul 4, 2023, 8:45 PM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Burlington County, NJ, Camden County, NJ

The radar

The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 21:48 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
Jul 4, 5:50 PM EDTFLOODCherry Hill, NJStreet and poor drainage flooding in Cherry Hill. Time estimated.
Jul 4, 5:50 PM EDTFLOODCherry Hill, NJStreet and poor drainage flooding in Cherry Hill. Time estimated.
Jul 4, 5:50 PM EDTFLOODCherry Hill, NJStreet and poor drainage flooding in Cherry Hill. Time estimated.
Jul 4, 5:50 PM EDTFLASH FLOOD1 Wsw Evesboro, NJA couple of water rescues on Greentree Road in Evesham due to deep flood waters. Time estimated.
Jul 4, 5:50 PM EDTFLASH FLOOD1 Wsw Evesboro, NJA couple of water rescues on Greentree Road in Evesham due to deep flood waters. Time estimated.
Jul 4, 5:50 PM EDTFLASH FLOOD1 Wsw Evesboro, NJA couple of water rescues on Greentree Road in Evesham due to deep flood waters. Time estimated.
Jul 4, 6:05 PM EDTFLASH FLOODHaddonfield, NJNumerous road closures and multiple water assists across the Borough of Haddonfield due to flooded roadways reported by Law Enforcement. Multiple photos and videos shared via social media of flooded roadways in the area. Time estimated by radar.
Jul 4, 6:05 PM EDTFLASH FLOODHaddonfield, NJNumerous road closures and multiple water assists across the Borough of Haddonfield due to flooded roadways reported by Law Enforcement. Multiple photos and videos shared via social media of flooded roadways in the area. Time estimated by radar.

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, 9.8 hours before the alert went out and 213 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 12:00Z on 2023-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 489 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, Brookhaven, NY at 12:00Z on 2023-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
489 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
701 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

441 
WGUS51 KPHI 042146
FFWPHI
NJC005-007-050045-
/O.NEW.KPHI.FF.W.0027.230704T2146Z-230705T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
546 PM EDT Tue Jul 4 2023

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  West Central Burlington County in southern New Jersey...
  Northwestern Camden County in southern New Jersey...

* Until 845 PM EDT.

* At 546 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 1.5 inches of 
  rain have fallen. Additional rainfall amounts up to 0.5 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           drainage and low lying areas.

* Some locations that may experience flash flooding include...
  Philadelphia, Camden, Gloucester City, Cherry Hill, Evesham, Mount 
  Laurel, Voorhees, Bellmawr, Palmyra, Magnolia, Westville, and 
  Brooklawn.

This includes the following highways...
	New Jersey Turnpike near exit 4.
	Interstate 76 in New Jersey between mile markers 1 and 3.
	Interstate 295 in New Jersey between mile markers 29 and 41.
	Interstate 676 in New Jersey between mile markers 0 and 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

&&

LAT...LON 3999 7506 4000 7505 3996 7479 3982 7486
      3988 7513 3989 7514 3990 7513 3991 7513
      3993 7514 3995 7514 3996 7513 3997 7511
      3998 7507

FLASH FLOOD...RADAR INDICATED

$$

AKL
3 follow-up statements
555 
WGUS71 KPHI 042221
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
621 PM EDT Tue Jul 4 2023

NJC005-007-050045-
/O.CON.KPHI.FF.W.0027.000000T0000Z-230705T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-
621 PM EDT Tue Jul 4 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT THIS 
EVENING FOR WEST CENTRAL BURLINGTON AND NORTHWESTERN CAMDEN 
COUNTIES...

At 621 PM EDT, local law enforcement reported thunderstorms 
producing heavy rain resulting in water rescues on Greentree Road in 
Evesham due to deep flood waters. Between 1.5 and 3 inches of rain 
have fallen. Additional rainfall amounts up to 1 inch are possible 
in the warned area. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding caused by thunderstorms.

SOURCE...Law enforcement reported.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets, and underpasses.

Some locations that may experience flash flooding include...
  Philadelphia, Camden, Gloucester City, Cherry Hill, Evesham, Mount 
  Laurel, Voorhees, Bellmawr, Palmyra, Magnolia, Westville, and 
  Brooklawn.

This includes the following highways...
	New Jersey Turnpike near exit 4.
	Interstate 76 in New Jersey between mile markers 1 and 3.
	Interstate 295 in New Jersey between mile markers 28 and 41.
	Interstate 676 in New Jersey between mile markers 0 and 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

&&

LAT...LON 3999 7506 4000 7505 3996 7479 3982 7486
      3988 7513 3989 7514 3990 7513 3991 7513
      3993 7514 3995 7514 3996 7513 3997 7511
      3998 7507

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

AKL
972 
WGUS71 KPHI 042353
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
753 PM EDT Tue Jul 4 2023

NJC005-007-050045-
/O.CON.KPHI.FF.W.0027.000000T0000Z-230705T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-
753 PM EDT Tue Jul 4 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT THIS 
EVENING FOR WEST CENTRAL BURLINGTON AND NORTHWESTERN CAMDEN 
COUNTIES...

At 753 PM EDT, emergency management reported that Station Avenue 
remains closed in Haddonfield and Haddon Heights as a result of 
flooding. Between 1.5 and 3.5 inches of rain have fallen. While 
heavy rainfall has ended, flash flooding remains ongoing.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets, and underpasses as well as other
         drainage and low lying areas.

Some locations that may experience flash flooding include...
  Philadelphia, Camden, Gloucester City, Cherry Hill, Evesham, Mount 
  Laurel, Voorhees, Bellmawr, Palmyra, Magnolia, Westville, and 
  Brooklawn.

This includes the following highways...
	New Jersey Turnpike near exit 4.
	Interstate 76 in New Jersey between mile markers 1 and 3.
	Interstate 295 in New Jersey between mile markers 28 and 41.
	Interstate 676 in New Jersey between mile markers 0 and 4.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

Motorists should not attempt to drive around barricades or drive 
cars through flooded areas.

&&

LAT...LON 3999 7506 4000 7505 3996 7479 3982 7486
      3988 7513 3989 7514 3990 7513 3991 7513
      3993 7514 3995 7514 3996 7513 3997 7511
      3998 7507

FLASH FLOOD...OBSERVED

$$

AKL
192 
WGUS71 KPHI 050040
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
840 PM EDT Tue Jul 4 2023

NJC005-007-050050-
/O.EXP.KPHI.FF.W.0027.000000T0000Z-230705T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-
840 PM EDT Tue Jul 4 2023

...FLASH FLOOD WARNING WILL EXPIRE AT 845 PM EDT THIS EVENING FOR 
WEST CENTRAL BURLINGTON AND NORTHWESTERN CAMDEN COUNTIES...

The heavy rain has ended. Flood waters are expected to continue to 
recede through tonight. Flash flooding is no longer expected to pose 
a threat.

LAT...LON 3999 7506 4000 7505 3996 7479 3982 7486
      3988 7513 3989 7514 3990 7513 3991 7513
      3993 7514 3995 7514 3996 7513 3997 7511
      3998 7507

$$

AKL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 8:27 PM EDTSevere Thunderstorm WarningPHICape May48 min
Jul 3, 8:34 PM EDTSpecial Marine WarningPHI116 min
Jul 3, 8:41 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem49 min
Jul 3, 8:50 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Sussex, Warren115 min
Jul 3, 8:58 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland47 min
Jul 3, 9:02 PM EDTSpecial Marine WarningPHI118 min
Jul 3, 9:07 PM EDTFlash Flood WarningPHISalem5 hr
Jul 3, 9:22 PM EDTAreal Flood AdvisoryPHIMorris83 min
Jul 3, 9:25 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem35 min
Jul 3, 9:52 PM EDTSevere Thunderstorm Warning Considerable damage threatPHIAtlantic, Burlington, Camden, Gloucester, Salem38 min
Jul 3, 10:36 PM EDTAreal Flood AdvisoryPHIGloucester, Salem4 hr
Jul 4, 1:58 PM EDTSpecial Weather StatementPHIMonmouth32 min
Jul 4, 2:51 PM EDTSpecial Weather StatementPHIMiddlesex24 min
Jul 4, 2:58 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth3 hr
Jul 4, 3:09 PM EDTAreal Flood AdvisoryPHIMiddlesex, Morris, Somerset2 hr
Jul 4, 3:16 PM EDTSpecial Weather StatementPHIMercer, Middlesex, Monmouth29 min
Jul 4, 3:19 PM EDTSpecial Weather StatementPHIPassaic26 min
Jul 4, 3:22 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth, Ocean38 min
Jul 4, 3:34 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Somerset2 hr
Jul 4, 3:45 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex45 min
Jul 4, 3:52 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean38 min
Jul 4, 4:11 PM EDTAreal Flood AdvisoryPHIMercer, Middlesex, Monmouth, Ocean2 hr
Jul 4, 4:19 PM EDTSpecial Marine WarningPHI56 min
Jul 4, 4:24 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Monmouth, Ocean36 min
Jul 4, 4:26 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren23 min
Jul 4, 4:43 PM EDTAreal Flood AdvisoryPHIBurlington, Mercer, Monmouth, Ocean2 hr
Jul 4, 4:59 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Ocean46 min
Jul 4, 5:23 PM EDTAreal Flood AdvisoryPHIBurlington, Camden112 min
Jul 4, 5:30 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren33 min
Jul 4, 5:44 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester46 min
Jul 4, 6:02 PM EDTSpecial Weather StatementPHIMiddlesex28 min
Jul 4, 6:06 PM EDTAreal Flood AdvisoryPHIWarren114 min
Jul 4, 6:29 PM EDTSevere Thunderstorm Warning Considerable damage threatPHICamden, Gloucester21 min
Jul 4, 7:05 PM EDTAreal Flood AdvisoryPHICamden, Gloucester2 hr

Nearby

Flash Flood Warnings in New Jersey, 2023Every flash flood warning in 2023

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.