Alert archive / New Jersey / Flash Flood Warnings in 2018

Flash Flood Warning 24, NWS Philadelphia/Mount Holly

July 3, 2018Burlington County, Camden County, New Jersey; Bucks County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 3, 2018, 6:37 PM EDT for Burlington County, Camden County, New Jersey; Bucks 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: Jul 3, 2018, 6:37 PM EDT (22:37 UTC)
Expired: Jul 3, 2018, 9:34 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, Bucks County, PA, Philadelphia County, PA

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.6 hours before the alert went out and 197 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 864 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

750 
WGUS51 KPHI 032237
FFWPHI
NJC005-007-PAC017-101-040230-
/O.NEW.KPHI.FF.W.0024.180703T2237Z-180704T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
637 PM EDT TUE JUL 3 2018

The National Weather Service in Mount Holly NJ has issued a

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

* Until 1030 PM EDT.

* At 636 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Philadelphia, Camden, Cherry Hill, Bensalem, Evesham, Mount Laurel,
  Willingboro, Lumberton, Burlington, Bristol, Mount Holly,
  Riverside, Palmyra, Beverly, Wissinoming, Ramblewood,
  Barclay-Kingston, Cherry Hill Mall, Golden Triangle and Tacony.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 4014 7490 4000 7468 3984 7494 3999 7515

$$

Meola

2 follow-up statements

425 
WGUS71 KPHI 040020
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
820 PM EDT TUE JUL 3 2018

NJC005-007-PAC017-040026-
/O.CAN.KPHI.FF.W.0024.000000T0000Z-180704T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-Burlington NJ-Bucks PA-
820 PM EDT TUE JUL 3 2018

...THE FLASH FLOOD WARNING FOR NORTHWESTERN CAMDEN...NORTHWESTERN
BURLINGTON AND SOUTHEASTERN BUCKS COUNTIES IS CANCELLED...

Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.

LAT...LON 4006 7498 4005 7498 3997 7512 3999 7515
      4010 7496 4008 7496

$$

PAC101-040230-
/O.CON.KPHI.FF.W.0024.000000T0000Z-180704T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Philadelphia PA-
820 PM EDT TUE JUL 3 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT FOR
EAST CENTRAL PHILADELPHIA COUNTY...

At 816 PM EDT, Doppler radar indicated mainly light rain shower 
activity across east central Philadelphia County, but because 
streams continue to run high from earlier rain, the Flash Flood 
Warning remains in effect to provide enough time for this water to 
recede. 

Some locations that could experience flooding include...
Philadelphia, Holmesburg, Tacony, Wissinoming, Kensington and
Andalusia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4006 7498 4005 7498 3997 7512 3999 7515
      4010 7496 4008 7496

$$

jjm

907 
WGUS71 KPHI 040134
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
934 PM EDT TUE JUL 3 2018

PAC101-040144-
/O.CAN.KPHI.FF.W.0024.000000T0000Z-180704T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Philadelphia PA-
934 PM EDT TUE JUL 3 2018

...THE FLASH FLOOD WARNING FOR EAST CENTRAL PHILADELPHIA COUNTY IS
CANCELLED...

Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.

LAT...LON 4006 7498 4005 7498 3997 7512 3999 7515
      4010 7496 4008 7496

$$

jjm

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 2:33 PM EDT	Special Weather Statement	PHI	Union	27 min
Jul 3, 2:57 PM EDT	Special Weather Statement	PHI	Morris	63 min
Jul 3, 3:19 PM EDT	Flash Flood Warning	PHI	Morris	3 hr
Jul 3, 3:28 PM EDT	Special Weather Statement	PHI	Salem	62 min
Jul 3, 3:30 PM EDT	Special Weather Statement	PHI	Burlington	60 min
Jul 3, 3:43 PM EDT	Flash Flood Warning	PHI	Morris	2 hr
Jul 3, 4:49 PM EDT	Special Weather Statement	PHI	Somerset	56 min
Jul 3, 4:52 PM EDT	Special Weather Statement	PHI	Mercer	53 min
Jul 3, 4:57 PM EDT	Flash Flood Warning	PHI	Hunterdon, Somerset	114 min
Jul 3, 5:24 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	4 hr
Jul 3, 5:29 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Somerset	4 hr
Jul 3, 5:45 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester	4 hr
Jul 3, 5:47 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	2 hr
Jul 3, 5:57 PM EDT	Special Weather Statement	PHI	Gloucester	33 min
Jul 3, 6:03 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Jul 3, 6:11 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	49 min
Jul 3, 6:25 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	50 min
Jul 3, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	44 min
Jul 3, 6:58 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	49 min
Jul 3, 7:03 PM EDT	Special Weather Statement	PHI	Warren	57 min
Jul 3, 2:15 PM EDT	Special Weather Statement	PHI	Delaware	30 min
Jul 3, 3:00 PM EDT	Special Weather Statement	PHI	Philadelphia	60 min
Jul 3, 3:11 PM EDT	Flash Flood Warning	PHI	Montgomery, Philadelphia	50 min
Jul 3, 4:06 PM EDT	Special Weather Statement	PHI	Montgomery	54 min
Jul 3, 4:30 PM EDT	Special Weather Statement	PHI	Bucks	60 min
Jul 3, 5:30 PM EDT	Special Weather Statement	PHI	Philadelphia	30 min
Jul 3, 6:15 PM EDT	Special Weather Statement	PHI	Chester	60 min
Jul 3, 6:18 PM EDT	Severe Thunderstorm Warning	PHI	Delaware, Philadelphia	42 min
Jul 3, 6:21 PM EDT	Special Weather Statement	PHI	Delaware	24 min
Jul 3, 6:40 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	4 hr
Jul 3, 6:50 PM EDT	Special Weather Statement	PHI	Delaware	55 min
Jul 3, 6:54 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	51 min
Jul 3, 6:58 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	4 hr
Jul 3, 7:06 PM EDT	Flash Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	2 hr
Jul 3, 7:22 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	21 min
Jul 3, 7:35 PM EDT	Special Weather Statement	PHI	Chester	25 min
Jul 3, 7:39 PM EDT	Severe Thunderstorm Warning	PHI	Chester	51 min
Jul 3, 7:54 PM EDT	Flash Flood Warning	PHI	Chester	4 hr

Nearby

Flash Flood Warnings in New Jersey, 2018 Flash Flood Warnings in Pennsylvania, 2018 Every flash flood warning in 2018

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.