Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 44, NWS Philadelphia/Mount Holly

July 23, 20135 counties in New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 23, 2013, 2:11 AM EDT for 5 counties in New Jersey; 4 counties in Pennsylvania. It was in force for 4 hr. 7 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 23, 2013, 2:11 AM EDT (06:11 UTC)
Expired: Jul 23, 2013, 6:15 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, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA, Delaware 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 06:12 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 23, 2:30 AM EDT	FLASH FLOOD	Philadelphia, PA	SEVERAL AREAS OF SIGNIFICANT FLOODING ON THE SCHUYLKILL EXPRESSWAY.
Jul 23, 2:30 AM EDT	FLASH FLOOD	Schwenksville, PA	SOME ROADS FLOODED OUT NEAR SCHWENKSVILLE.
Jul 23, 2:45 AM EDT	FLASH FLOOD	West Deptford Twp, NJ	WATER ESTIMATED TO BE A FOOT DEEP ON HESSIAN AVENUE IN WEST DEPTFORD. SIGNIFICANT POOR DRAINAGE AND STREET FLOODING REPORTED.
Jul 23, 3:00 AM EDT	FLOOD	Pennsauken, NJ	ROUTE 130 CLOSED NEAR BROWNING ROAD DUE TO SIGNIFICANT FLOODING.
Jul 23, 3:00 AM EDT	FLASH FLOOD	Camden, NJ	THE ADMIRAL WILSON BOULEVARD CLOSED DUE TO SIGNIFICANT FLOODING. SOME VEHICLES STUCK IN THE HIGH WATER.
Jul 23, 3:00 AM EDT	FLASH FLOOD	Pennsauken, NJ	ROUTE 130 CLOSED NEAR BROWNING ROAD DUE TO SIGNIFICANT FLOODING.
Jul 23, 3:00 AM EDT	FLASH FLOOD	Philadelphia, PA	SIGNIFICANT FLOODING ON BROAD STREET IN SOUTH PHILADELHIA UNDER I-95 WITH SOME VEHICLES TRAPPED. THE WATER WAS NEARLY UP TO THE CAR WINDOWS.

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, 6.2 hours before the alert went out and 190 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: 367 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

736 
WGUS51 KPHI 230611
FFWPHI
NJC005-007-015-019-021-PAC017-045-091-101-231015-
/O.NEW.KPHI.FF.W.0044.130723T0611Z-130723T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
211 AM EDT TUE JUL 23 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CAMDEN COUNTY...
  HUNTERDON COUNTY...
  MERCER COUNTY...
  BUCKS COUNTY...
  MONTGOMERY COUNTY...
  PHILADELPHIA COUNTY...
  DELAWARE COUNTY...
  NORTHWESTERN GLOUCESTER COUNTY...
  NORTHWESTERN BURLINGTON COUNTY...

* UNTIL 615 AM EDT...

* AT 208 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN ACROSS PORTIONS OF SOUTHEASTERN PENNSYLVANIA AND 
SOUTHERN NEW JERSEY.  THIS RAIN WAS MOVING SLOWLY NORTHEASTWARD AND 
WILL IMPACT LOCATIONS THAT RECEIVED VERY HEAVY RAINFALL MONDAY 
EVENING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TRENTON...
  PHILADELPHIA...CAMDEN AND GLOUCESTER CITY.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4019 7457 4018 7461 4008 7455 4006 7457
      3968 7518 3995 7551 3998 7544 4004 7541
      4007 7536 4009 7545 4019 7555 4060 7519
      4073 7496 4053 7475 4050 7479 4038 7472
      4039 7463 4033 7462 4025 7448

$$

NIERENBERG

1 follow-up statement

144 
WGUS71 KPHI 231014
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
614 AM EDT TUE JUL 23 2013

NJC005-007-015-019-021-PAC017-045-091-101-231024-
/O.EXP.KPHI.FF.W.0044.000000T0000Z-130723T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-HUNTERDON NJ-MERCER NJ-BUCKS PA-MONTGOMERY PA-
PHILADELPHIA PA-DELAWARE PA-GLOUCESTER NJ-BURLINGTON NJ-
614 AM EDT TUE JUL 23 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 AM EDT FOR NORTHWESTERN
BURLINGTON...NORTHWESTERN GLOUCESTER...DELAWARE...PHILADELPHIA...
MONTGOMERY...BUCKS...MERCER...HUNTERDON AND NORTHWESTERN CAMDEN
COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND NO LONGER
POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH FLOOD
WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4019 7457 4018 7461 4008 7455 4006 7457
      3968 7518 3995 7551 3998 7544 4004 7541
      4007 7536 4009 7545 4019 7555 4060 7519
      4073 7496 4053 7475 4050 7479 4038 7472
      4039 7463 4033 7462 4025 7448

$$

FORECASTER: GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 9:48 PM EDT	Areal Flood Advisory	PHI	Morris	4 hr
Jul 23, 1:50 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer	4 hr
Jul 23, 2:38 AM EDT	Special Weather Statement	PHI	Mercer, Middlesex	97 min
Jul 23, 3:49 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more	11 hr
Jul 23, 4:02 AM EDT	Areal Flood Advisory	PHI	Burlington, Monmouth, Ocean	4 hr
Jul 23, 9:24 AM EDT	Areal Flood Warning	PHI	Burlington	6 hr
Jul 23, 10:32 AM EDT	Special Weather Statement	PHI	Atlantic	58 min
Jul 23, 11:22 AM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	53 min
Jul 23, 11:56 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland, Ocean	4 hr
Jul 23, 12:03 PM EDT	Special Weather Statement	PHI	Atlantic	57 min
Jul 23, 12:54 PM EDT	Special Weather Statement	PHI	Atlantic	66 min
Jul 23, 3:08 PM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	9 hr
Jul 23, 4:10 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 6 more	2 hr
Jul 22, 9:19 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	3 hr
Jul 22, 9:53 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh	3 hr
Jul 22, 11:09 PM EDT	Areal Flood Advisory	PHI	Berks, Chester	3 hr
Jul 22, 11:39 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh	4 hr
Jul 23, 12:11 AM EDT	Special Weather Statement	PHI	Chester	94 min
Jul 23, 12:25 AM EDT	Flash Flood Warning	PHI	Chester	4 hr

Nearby

Flash Flood Warnings in New Jersey, 2013 Flash Flood Warnings in Pennsylvania, 2013 Every flash flood warning in 2013

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.