Alert archive / Pennsylvania / Flash Flood Warnings in 2024

Flash Flood Warning 5, NWS Philadelphia/Mount Holly

June 14, 2024Burlington County, New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 14, 2024, 5:59 PM EDT for Burlington County, New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 4 hr. 4 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
Jun 14, 2024, 5:59 PM EDT (21:59 UTC)
Expired
Jun 14, 2024, 10:00 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Burlington County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 46 km from the middle of the area, began a volume at 22:01 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
Jun 14, 6:04 PM EDTFLASH FLOOD1 Ne Cooperstown, NJPhotos from trained spotter showing unusual flooding along US Route 130 between northern Willingboro Twp and Burlington. Water was up to a foot deep in spots.
Jun 14, 6:29 PM EDTFLASH FLOOD1 N Burlington Twp, NJReport from mPING: Street/road flooding; Street/road closed; Vehicles stranded.
Jun 14, 6:38 PM EDTFLASH FLOOD1 Nnw Burlington Twp, NJFlooding on LaGorce Road in Burlington. Social media photo indicates at least 1 foot deep flood waters.
Jun 14, 8:11 PM EDTFLASH FLOOD1 W Bristol, PAPhotos of flooding along Otter Street in Bristol.

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, 10.0 hours before the alert went out and 191 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 2024-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 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, Brookhaven, NY at 12:00Z on 2024-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 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
61 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
969 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

510 
WGUS51 KPHI 142159
FFWPHI
NJC005-PAC017-091-101-150200-
/O.NEW.KPHI.FF.W.0005.240614T2159Z-240615T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
559 PM EDT Fri Jun 14 2024

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Northwestern Burlington County in southern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...
  Southeastern Montgomery County in southeastern Pennsylvania...
  Philadelphia County in southeastern Pennsylvania...

* Until 1000 PM EDT.

* At 559 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, Trenton, Bensalem, Willingboro, Florence, 
  Burlington, Bristol, Riverside, Palmyra, Jenkintown, Narberth and 
  Bordentown.

This includes the following highways...
	Interstate 295 in New Jersey between mile markers 47 and 54...and
	near mile marker 57.
	New Jersey Turnpike between exits 6 and 6A.
	Interstate 76 in Pennsylvania between mile markers 334 and 342.
	Interstate 95 in Pennsylvania between mile markers 27 and 40.
	Pennsylvania Turnpike between mile markers 350 and 359.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4014 7501 4019 7476 4016 7472 4015 7472
      4016 7471 4016 7470 4003 7478 3998 7528
      4011 7528

FLASH FLOOD...RADAR INDICATED

$$

AKL
2 follow-up statements
599 
WGUS71 KPHI 142237
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
637 PM EDT Fri Jun 14 2024

NJC005-PAC017-091-101-150200-
/O.CON.KPHI.FF.W.0005.000000T0000Z-240615T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Bucks PA-Montgomery PA-Philadelphia PA-
637 PM EDT Fri Jun 14 2024

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS 
EVENING FOR NORTHWESTERN BURLINGTON, SOUTHEASTERN BUCKS, 
SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES...

At 637 PM EDT, trained weather spotters reported flash flooding 
occurring along Route 130 between Willingboro and Burlington in New 
Jersey. 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 already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Trained spotters 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, Trenton, Bensalem, Willingboro, Florence, 
  Burlington, Bristol, Riverside, Palmyra, Jenkintown, Narberth and 
  Bordentown.

This includes the following highways...
	Interstate 295 in New Jersey between mile markers 47 and 55...and
	near mile marker 57.
	New Jersey Turnpike between exits 6 and 6A.
	Interstate 76 in Pennsylvania between mile markers 334 and 341.
	Interstate 95 in Pennsylvania between mile markers 27 and 40.
	Pennsylvania Turnpike between mile markers 350 and 359.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4014 7501 4019 7476 4016 7472 4015 7472
      4016 7471 4016 7470 4003 7478 3998 7528
      4011 7528

FLASH FLOOD...OBSERVED

$$

AKL
859 
WGUS71 KPHI 150157 RRA
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
957 PM EDT Fri Jun 14 2024

NJC005-PAC017-091-101-150207-
/O.EXP.KPHI.FF.W.0005.000000T0000Z-240615T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Bucks PA-Montgomery PA-Philadelphia PA-
957 PM EDT Fri Jun 14 2024

...FLASH FLOOD WARNING WILL EXPIRE AT 10 PM EDT THIS EVENING FOR 
NORTHWESTERN BURLINGTON, SOUTHEASTERN BUCKS, SOUTHEASTERN MONTGOMERY 
AND 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 4014 7501 4019 7476 4016 7472 4015 7472
      4016 7471 4016 7470 4003 7478 3998 7528
      4011 7528

$$

Robertson

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 14, 4:14 PM EDTSevere Thunderstorm WarningPHISussex, Warren46 min
Jun 14, 4:40 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren50 min
Jun 14, 5:02 PM EDTSevere Thunderstorm WarningPHISussex43 min
Jun 14, 5:18 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren42 min
Jun 14, 5:23 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Warren52 min
Jun 14, 5:37 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Hunterdon, Mercer38 min
Jun 14, 5:51 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean39 min
Jun 14, 5:56 PM EDTSpecial Marine WarningPHI64 min
Jun 14, 6:09 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Somerset21 min
Jun 14, 6:18 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth, Somerset27 min
Jun 14, 6:24 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean51 min
Jun 14, 6:29 PM EDTSpecial Marine WarningPHI2 hr
Jun 14, 6:34 PM EDTSevere Thunderstorm WarningPHICape May, Cumberland41 min
Jun 14, 6:40 PM EDTSpecial Marine WarningPHI65 min
Jun 14, 6:44 PM EDTFlash Flood WarningPHIBurlington, Mercer3 hr
Jun 14, 6:47 PM EDTSpecial Marine WarningPHI58 min
Jun 14, 7:03 PM EDTSpecial Marine WarningPHI87 min
Jun 14, 4:37 PM EDTSevere Thunderstorm WarningPHIBerks, Lehigh38 min
Jun 14, 5:07 PM EDTFlash Flood WarningPHIChester4 hr
Jun 14, 5:17 PM EDTSevere Thunderstorm WarningPHIDelaware, Montgomery, Philadelphia43 min

Nearby

Flash Flood Warnings in Pennsylvania, 2024Flash Flood Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.