Alert archive / New Jersey / Flash Flood Warnings in 2014

Flash Flood Warning 34, NWS Philadelphia/Mount Holly

July 14, 2014Bucks County, Montgomery County, Philadelphia County, Pennsylvania; 7 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 14, 2014, 8:19 PM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania; 7 counties in New Jersey. It was in force for 4 hr. 14 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 14, 2014, 8:19 PM EDT (00:19 UTC)
Expired: Jul 15, 2014, 12:15 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Burlington County, NJ, Camden County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Somerset County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 55 km from the middle of the area, began a volume at 00:20 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

Time	Report	Where	Remark
Jul 14, 8:30 PM EDT	FLASH FLOOD	Center City, PA	SIGNIFICANT FLOODING AND STORM DRAINS OVERFLOWING AT INTERSECTION OF 12TH STREET AND CHESTNUT STREET.
Jul 14, 8:33 PM EDT	FLASH FLOOD	Bordentown Twp, NJ	INTERSTATE 295 CLOSED IN BOTH DIRECTIONS IN BORDENTOWN TWP DUE TO FLOODING.
Jul 14, 8:43 PM EDT	FLASH FLOOD	Sayreville, NJ	REPORTS OF MOTORISTS STRANDED IN HIGH WATER
Jul 14, 8:45 PM EDT	FLASH FLOOD	Hazlet, NJ	ROAD CLOSURES DUE TO FLOODING... INCLUDING HWY 36 AND FLORENCE AVE.
Jul 14, 8:47 PM EDT	FLASH FLOOD	Philadelphia, PA	FRANKFORD CREEK FLOODED
Jul 14, 8:52 PM EDT	FLASH FLOOD	Philadelphia, PA	PENNYPACK CREEK FLOODED.
Jul 14, 8:53 PM EDT	FLASH FLOOD	Crosswicks, NJ	RESIDENTS BEING RESCUED FROM HOME ALONG ELLISDALE ROAD DUE TO FAST RISING FLOOD WATERS.
Jul 14, 9:03 PM EDT	FLASH FLOOD	Bristol, PA	NUMEROUS ROADS FLOODED IN BRISTOL... INCLUDING RADCLIFFE ST... SARRAGUT ST... AND WILSON ST.
Jul 14, 9:59 PM EDT	FLASH FLOOD	Bristol, PA	SEVERE FLOODING ON CAMPUS OF LOWER BUCKS HOSPITAL. WATER FROM PARKING LOT INTO HOSPITALS STAIRCASES.
Jul 14, 10:10 PM EDT	FLASH FLOOD	Perth Amboy, NJ	MARKET STREET... MAPLE STREET... FAYETTE STREET... NEW BRUNSWICK AVENUE ALL CLOSED DUE TO FLOODING.
Jul 14, 10:53 PM EDT	HEAVY RAIN 3.78	Middlebush, NJ
Jul 14, 10:59 PM EDT	HEAVY RAIN 2.92	Old Bridge, NJ
Jul 14, 11:02 PM EDT	HEAVY RAIN 3.11	New Brunswick, NJ
Jul 14, 11:02 PM EDT	HEAVY RAIN 3.42	Holmdel, NJ

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 00:00Z, 0.3 hours before the alert went out and 145 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: 921 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 446 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

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

087 
WGUS51 KPHI 150019
FFWPHI
NJC005-007-019-021-023-025-035-PAC017-091-101-150415-
/O.NEW.KPHI.FF.W.0034.140715T0019Z-140715T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
819 PM EDT MON JUL 14 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF TRENTON...
  WESTERN MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...NEW BRUNSWICK...SOUTH AMBOY...PERTH
  AMBOY...
  SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF SOMERVILLE...
  SOUTHEASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF PHILADELPHIA...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...GLOUCESTER CITY...CAMDEN...

* UNTIL 1215 AM EDT

* AT 815 PM EDT...HEAVY RAIN CONTINUED OVER THE AREA AND MORE IS ON  
  THE WAY. RAINFALL RATES OVER 2 INCHES PER HOUR IN SPOTS ARE        
  POSSIBLE UNTIL THE RAIN MOVES OUT.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS 
WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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.

&&

LAT...LON 3974 7498 3986 7510 4013 7545 4072 7453
      4070 7451 4068 7453 4065 7452 4067 7446
      4067 7440 4060 7444 4061 7421 4058 7420
      4055 7424 4049 7426 4047 7425 4044 7407
      4048 7402 4048 7400

$$

JJM

1 follow-up statement

531 
WGUS71 KPHI 150415
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1215 AM EDT TUE JUL 15 2014

NJC005-007-019-021-023-025-035-PAC017-091-101-150424-
/O.EXP.KPHI.FF.W.0034.000000T0000Z-140715T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-HUNTERDON NJ-MERCER NJ-SOMERSET NJ-BUCKS PA-MONTGOMERY PA-
PHILADELPHIA PA-MIDDLESEX NJ-BURLINGTON NJ-MONMOUTH NJ-
1215 AM EDT TUE JUL 15 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1215 AM EDT FOR WESTERN
MONMOUTH...NORTHWESTERN BURLINGTON...MIDDLESEX...PHILADELPHIA...
SOUTHEASTERN MONTGOMERY...SOUTHEASTERN BUCKS...SOMERSET...MERCER...
SOUTHEASTERN HUNTERDON AND NORTHWESTERN CAMDEN COUNTIES...

THE HEAVY RAIN HAS MOVED OUT OF THE REGION. THERE COULD BE SOME
LEFTOVER PONDING OF WATER IN POOR DRAINAGE LOCATIONS. PLEASE BE CAUTIOUS
IF DRIVING OVERNIGHT.


LAT...LON 3974 7498 3986 7510 4013 7545 4072 7453
      4070 7451 4068 7453 4065 7452 4067 7446
      4067 7440 4060 7444 4061 7421 4058 7420
      4055 7424 4049 7426 4047 7425 4044 7407
      4048 7402 4048 7400

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 4:26 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	64 min
Jul 15, 7:20 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Jul 15, 7:32 PM EDT	Areal Flood Advisory	PHI	Chester, Montgomery	6 hr
Jul 14, 8:19 PM EDT	Tornado Warning	PHI	Burlington	26 min
Jul 14, 8:36 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	54 min
Jul 14, 8:43 PM EDT	Flash Flood Warning	PHI	Burlington, Monmouth, Ocean	4 hr
Jul 14, 9:06 PM EDT	Special Marine Warning	PHI		84 min
Jul 14, 10:26 PM EDT	Special Marine Warning	PHI		49 min
Jul 15, 2:50 AM EDT	Areal Flood Warning	PHI	Ocean	5 hr
Jul 15, 3:53 AM EDT	Small Craft Advisory	PHI		24 hr
Jul 15, 1:09 PM EDT	Special Weather Statement	PHI	Somerset	66 min
Jul 15, 1:21 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth	54 min
Jul 15, 1:22 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 2 more	3 hr
Jul 15, 1:36 PM EDT	Special Weather Statement	PHI	Monmouth	54 min
Jul 15, 1:50 PM EDT	Flash Flood Warning	PHI	Middlesex, Monmouth, Ocean	4 hr
Jul 15, 1:52 PM EDT	Special Weather Statement	PHI	Burlington, Camden	68 min
Jul 15, 2:17 PM EDT	Special Weather Statement	PHI	Mercer	43 min
Jul 15, 2:22 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Jul 15, 2:29 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	51 min
Jul 15, 2:30 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth	41 min
Jul 15, 2:43 PM EDT	Special Weather Statement	PHI	Monmouth	32 min
Jul 15, 2:44 PM EDT	Special Marine Warning	PHI		31 min
Jul 15, 2:46 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	3 hr
Jul 15, 3:14 PM EDT	Flash Flood Warning	PHI	Monmouth, Ocean	7 hr
Jul 15, 3:23 PM EDT	Special Weather Statement	PHI	Monmouth	67 min
Jul 15, 3:42 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	63 min
Jul 15, 3:44 PM EDT	Special Marine Warning	PHI		91 min
Jul 15, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	56 min
Jul 15, 4:27 PM EDT	Flash Flood Warning	PHI	Camden, Cumberland, Gloucester, Salem	4 hr
Jul 15, 4:37 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	53 min
Jul 15, 4:53 PM EDT	Special Marine Warning	PHI		67 min
Jul 15, 5:05 PM EDT	Special Weather Statement	PHI	Burlington	55 min
Jul 15, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	64 min
Jul 15, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Monmouth, Ocean	61 min
Jul 15, 5:43 PM EDT	Special Weather Statement	PHI	Ocean	62 min
Jul 15, 5:45 PM EDT	Special Weather Statement	PHI	Atlantic	60 min
Jul 15, 5:50 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset	4 hr
Jul 15, 5:57 PM EDT	Special Marine Warning	PHI		63 min
Jul 15, 6:00 PM EDT	Special Marine Warning	PHI		60 min
Jul 15, 6:03 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 15, 6:05 PM EDT	Special Marine Warning	PHI		115 min
Jul 15, 6:11 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Ocean and 1 more	4 hr
Jul 15, 6:11 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	50 min
Jul 15, 6:12 PM EDT	Special Weather Statement	PHI	Morris	63 min
Jul 15, 6:17 PM EDT	Special Weather Statement	PHI	Cape May	58 min
Jul 15, 6:44 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Ocean	4 hr

Nearby

Flash Flood Warnings in New Jersey, 2014 Flash Flood Warnings in Pennsylvania, 2014 Every flash flood warning in 2014

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.