Alert archive / New Jersey / Flash Flood Warnings in 2024

Flash Flood Warning 13, NWS Philadelphia/Mount Holly

June 30, 2024Burlington County, Camden County, Gloucester County, New Jersey; Delaware County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 30, 2024, 5:54 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Delaware County, Philadelphia County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 30, 2024, 5:54 PM EDT (21:54 UTC)
Expired
Jun 30, 2024, 9:00 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, Gloucester County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 21:54 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

Brookhaven, NY (KOKX), launched 12:00Z, 9.9 hours before the alert went out and 218 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 2024-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 856 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 2024-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.193958Sfc1 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
856 J/kg
Mixed-layer CIN
-133 J/kg
Mixed-layer LCL
1165 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

913 
WGUS51 KPHI 302154
FFWPHI
NJC005-007-015-PAC045-101-010100-
/O.NEW.KPHI.FF.W.0013.240630T2154Z-240701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
554 PM EDT Sun Jun 30 2024

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  West Central Burlington County in southern New Jersey...
  Camden County in southern New Jersey...
  Northeastern Gloucester County in southern New Jersey...
  East Central Delaware County in southeastern Pennsylvania...
  Southwestern Philadelphia County in southeastern Pennsylvania...

* Until 900 PM EDT.

* At 554 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 1 inch of rain 
  has fallen. The expected rainfall rate is 0.5 to 1 inch in 1 hour. 
  Additional rainfall amounts of 0.5 to 1.5 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, Deptford, Voorhees, Medford, West Deptford, Lindenwold and 
  Bellmawr.

This includes the following highways...
	Atlantic City Expressway between mile markers 39 and 44.
	Interstate 295 in New Jersey between mile markers 19 and 41.
	New Jersey Turnpike between exits 3 and 4.
	Interstate 76 in Pennsylvania between mile markers 340 and 351.
	Interstate 95 in Pennsylvania between mile markers 13 and 27.
	Interstate 676 in Pennsylvania between mile markers 0 and 1.
	Interstate 676 in New Jersey between mile markers 0 and 4.
	Interstate 76 in New Jersey between mile markers 0 and 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4001 7521 4003 7523 4004 7522 3993 7464
      3976 7476 3971 7503 3983 7526 3986 7525
      3993 7524 3997 7528

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR

$$

SFJ
2 follow-up statements
383 
WGUS71 KPHI 302232
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
632 PM EDT Sun Jun 30 2024

NJC005-007-015-PAC045-101-010100-
/O.CON.KPHI.FF.W.0013.000000T0000Z-240701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Gloucester NJ-Delaware PA-Philadelphia PA-
632 PM EDT Sun Jun 30 2024

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING 
FOR WEST CENTRAL BURLINGTON, CAMDEN, NORTHEASTERN GLOUCESTER, EAST 
CENTRAL DELAWARE AND SOUTHWESTERN PHILADELPHIA COUNTIES...

At 632 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, Deptford, Voorhees, Medford, West Deptford, Lindenwold and 
  Bellmawr.

This includes the following highways...
	Atlantic City Expressway between mile markers 40 and 44.
	Interstate 295 in New Jersey between mile markers 19 and 41.
	New Jersey Turnpike between exits 3 and 4.
	Interstate 76 in Pennsylvania between mile markers 340 and 351.
	Interstate 95 in Pennsylvania between mile markers 13 and 27.
	Interstate 676 in Pennsylvania between mile markers 0 and 1.
	Interstate 676 in New Jersey between mile markers 0 and 4.
	Interstate 76 in New Jersey between mile markers 0 and 3.

Although the heaviest rain has left the warned area, additional 
light rain showers could exacerbate any flooding that may already be 
ongoing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4001 7521 4003 7523 4004 7522 3993 7464
      3976 7476 3971 7503 3983 7526 3986 7525
      3993 7524 3997 7528

FLASH FLOOD...RADAR INDICATED

$$

SFJ
720 
WGUS71 KPHI 010054
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
854 PM EDT Sun Jun 30 2024

NJC005-007-015-PAC045-101-010104-
/O.EXP.KPHI.FF.W.0013.000000T0000Z-240701T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Gloucester NJ-Delaware PA-Philadelphia PA-
854 PM EDT Sun Jun 30 2024

...FLASH FLOOD WARNING WILL EXPIRE AT 9 PM EDT THIS EVENING FOR WEST 
CENTRAL BURLINGTON, CAMDEN, NORTHEASTERN GLOUCESTER, EAST CENTRAL 
DELAWARE AND SOUTHWESTERN PHILADELPHIA COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 4001 7521 4003 7523 4004 7522 3993 7464
      3976 7476 3971 7503 3983 7526 3986 7525
      3993 7524 3997 7528

$$

SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 7:23 AM EDTFlash Flood WarningPHIAtlantic, Cape May, Cumberland4 hr
Jun 30, 8:00 AM EDTSpecial Marine WarningPHI49 min
Jun 30, 1:57 PM EDTSevere Thunderstorm WarningPHISussex, Warren48 min
Jun 30, 2:10 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren50 min
Jun 30, 2:42 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Sussex, Warren63 min
Jun 30, 3:16 PM EDTSmall Craft AdvisoryPHI21 hr
Jun 30, 3:26 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Warren49 min
Jun 30, 4:10 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset35 min
Jun 30, 4:25 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester50 min
Jun 30, 4:37 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer53 min
Jun 30, 4:44 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset31 min
Jun 30, 4:53 PM EDTFlash Flood WarningPHIHunterdon, Middlesex, Morris, Somerset3 hr
Jun 30, 5:09 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden51 min
Jun 30, 5:11 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Somerset49 min
Jun 30, 5:20 PM EDTSevere Thunderstorm WarningPHIMonmouth25 min
Jun 30, 5:26 PM EDTSpecial Marine WarningPHI34 min
Jun 30, 5:51 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Salem39 min
Jun 30, 5:55 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth, Somerset50 min
Jun 30, 6:06 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem39 min
Jun 30, 6:17 PM EDTSpecial Marine WarningPHI58 min
Jun 30, 6:26 PM EDTSpecial Marine WarningPHI64 min
Jun 30, 6:35 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem40 min
Jun 30, 6:40 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Ocean65 min
Jun 30, 6:42 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth48 min
Jun 30, 6:44 PM EDTSpecial Marine WarningPHI2 hr
Jun 30, 6:49 PM EDTSpecial Marine WarningPHI83 min
Jun 30, 7:00 PM EDTSevere Thunderstorm WarningPHICumberland45 min
Jun 30, 7:31 PM EDTSevere Thunderstorm WarningPHISalem44 min
Jun 30, 7:34 PM EDTSpecial Marine WarningPHI27 min
Jun 30, 7:37 PM EDTSpecial Marine WarningPHI53 min
Jun 30, 7:43 PM EDTSevere Thunderstorm WarningPHICape May, Cumberland24 min
Jun 30, 7:56 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cumberland, Gloucester, Salem49 min
Jun 29, 8:22 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery53 min
Jun 29, 10:23 PM EDTFlash Flood WarningPHIChester4 hr
Jun 30, 1:18 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe42 min
Jun 30, 2:45 PM EDTSevere Thunderstorm WarningPHICarbon, Lehigh, Monroe, Northampton45 min
Jun 30, 3:01 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Montgomery59 min
Jun 30, 3:46 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery44 min
Jun 30, 3:52 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Delaware, Montgomery38 min
Jun 30, 4:54 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Montgomery51 min
Jun 30, 5:19 PM EDTFlash Flood WarningPHIChester, Delaware, Philadelphia3 hr
Jun 30, 5:20 PM EDTSevere Thunderstorm WarningPHIChester, Delaware40 min

Nearby

Flash Flood Warnings in New Jersey, 2024Flash Flood Warnings in Pennsylvania, 2024Every flash flood warning in 2024

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.