Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 45, NWS Philadelphia/Mount Holly

July 28, 2013Delaware County, Philadelphia County, Pennsylvania; Camden County, Gloucester County, Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 28, 2013, 3:46 PM EDT for Delaware County, Philadelphia County, Pennsylvania; Camden County, Gloucester County, Salem County, New Jersey; New Castle County, Delaware. It was in force for 7 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 28, 2013, 3:46 PM EDT (19:46 UTC)
Expired: Jul 28, 2013, 10:45 PM EDT
In force: 7 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties New Castle County, DE, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 19:47 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 28, 4:53 PM EDT	FLASH FLOOD	Gloucester City, NJ	FLOODING ON I-76 AT EXIT 1C- CR 634 MARKET ST
Jul 28, 5:08 PM EDT	FLASH FLOOD	Gloucester City, NJ	FLOODING ON US 130 OFF OF INTERSTATE 76.
Jul 28, 5:16 PM EDT	FLASH FLOOD	Philadelphia, PA	FLOODED RAMPS BETWEEN 1-95 AND BROAD STREET.
Jul 28, 5:48 PM EDT	FLASH FLOOD	Haddon Twp, NJ	FLOODING ON NJ 168 AND COUNTY ROAD 635. LANES CLOSED.
Jul 28, 5:52 PM EDT	FLASH FLOOD	Collingswood, NJ	FLOODING ON US 30 WESTBOUND NEAR COUNTY ROUTE 606.
Jul 28, 6:38 PM EDT	FLASH FLOOD	National Park, NJ	SEVERAL STREETS FLOODED WITH WATER OVER A FOOT DEEP.
Jul 28, 8:02 PM EDT	FLASH FLOOD	Bellmawr, NJ	FLOODING ON 168 AROUND 295.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.8 hours before the alert went out and 211 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: 325 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

927 
WGUS51 KPHI 281946
FFWPHI
DEC003-NJC007-015-033-PAC045-101-282245-
/O.NEW.KPHI.FF.W.0045.130728T1946Z-130728T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
346 PM EDT SUN JUL 28 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CAMDEN COUNTY...
  PHILADELPHIA COUNTY...
  SOUTHEASTERN DELAWARE COUNTY...
  NORTHWESTERN GLOUCESTER COUNTY...
  NORTHERN NEW CASTLE COUNTY...
  NORTHWESTERN SALEM COUNTY...

* UNTIL 645 PM EDT...

* AT 343 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER NORTHERN NEW CASTLE...
  NORTHWESTERN CAMDEN...NORTHWESTERN GLOUCESTER...NORTHWESTERN
  SALEM...PHILADELPHIA AND SOUTHEASTERN DELAWARE COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PHILADELPHIA INTERNATIONAL ARPT...BEAR...SAINT GEORGES...
  WILMINGTON...BECKETT...BEN FRANKLIN BRIDGE...CARNEYS POINT...
  DEPTFORD...GREENTREE...MAGNOLIA...NATIONAL PARK...PAULSBORO...PENNS
  GROVE...SPRINGDALE...SWEDESBORO...WEST DEPTFORD...WESTVILLE...
  WOODBURY...WOODBURY HEIGHTS...WOODSTOWN...CENTER CITY...
  KENSINGTON...PHILADELPHIA...PHILADELPHIA INTERNATIONAL AIRPORT...
  ROXBOROUGH...SOUTH PHILADELPHIA...WISSINOMING...BELLMAWR...
  CAMDEN...CHERRY HILL...GIBBSTOWN...GLOUCESTER CITY...MULLICA
  HILL...PENNSVILLE...CHESTER...EAST LANSDOWNE...FOLCROFT...
  SWARTHMORE...YEADON...DELAWARE CITY...NEW CASTLE AND WILMINGTON
  MANOR.

STORM TOTALS THIS AFTERNOON MAY APPROACH 4 INCHES OF PORTIONS OF THE 
URBAN AREAS.

ADDITIONALLY ONE OR TWO STORMS ARE CAPABLE OF PRODUCING 45 MPH WIND 
GUSTS AND NUMEROUS LIGHTNING STRIKES.  

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!

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 4007 7515 4005 7511 4005 7509 4001 7504
      3999 7506 3998 7501 3995 7502 3994 7498
      3989 7494 3969 7522 3956 7552 3959 7555
      3954 7556 3951 7564 3962 7571

$$

FORECASTER:  DRAG

2 follow-up statements

642 
WGUS71 KPHI 282059
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
459 PM EDT SUN JUL 28 2013

DEC003-NJC007-015-033-PAC045-101-282245-
/O.CON.KPHI.FF.W.0045.000000T0000Z-130728T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-PHILADELPHIA PA-DELAWARE PA-GLOUCESTER NJ-NEW CASTLE DE-
SALEM NJ-
459 PM EDT SUN JUL 28 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
NORTHWESTERN SALEM...NORTHEASTERN NEW CASTLE...NORTHWESTERN
GLOUCESTER...SOUTHEASTERN DELAWARE...PHILADELPHIA AND NORTHWESTERN
CAMDEN COUNTIES...

AT 453 PM EDT...DOPPLER RADAR CONTINUES TO INDICATE AN AREAS OF 
EXTREMELY INTENSE SHOWERS AND THUNDERSTORM PRODUCING FLASH FLOODING 
OVER NORTHEASTERN NEW CASTLE...NORTHWESTERN CAMDEN...NORTHWESTERN 
GLOUCESTER...NORTHWESTERN SALEM...PHILADELPHIA AND SOUTHEASTERN 
DELAWARE COUNTIES.

DOPPLER WEATHER RADAR INDICATES THAT RAINFALL TOTALS OF 2 TO 4 
INCHES HAS FALLEN ACROSS THE AREA SO FAR. AN ADDITIONAL RAINFALL 
WILL OCCUR OVER THE NEXT FEW HOURS. SEVERAL INCHES MORE RAINFALL IS 
POSSIBLE THROUGH 645 PM. 

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...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.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 4007 7515 4005 7511 4005 7509 4001 7504
      3999 7506 3998 7501 3995 7502 3994 7498
      3989 7494 3969 7522 3956 7552 3959 7555
      3954 7556 3951 7564 3962 7571

$$

FORECASTER:PO

254 
WGUS51 KPHI 282235
FFWPHI
DEC003-NJC007-015-033-PAC045-101-290245-
/O.EXT.KPHI.FF.W.0045.000000T0000Z-130729T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
635 PM EDT SUN JUL 28 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CAMDEN COUNTY...
  PHILADELPHIA COUNTY...
  SOUTHEASTERN DELAWARE COUNTY...
  NORTHWESTERN GLOUCESTER COUNTY...
  NORTHEASTERN NEW CASTLE COUNTY...
  NORTHWESTERN SALEM COUNTY...

* UNTIL 1045 PM EDT...

* AT 626 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES   
  THAT THE HEAVIEST RAINFALL HAS MOVED OUT OF THE WARNING AREA...BUT 
  EXTENSIVE FLOODING WILL CONTINUE INTO THE EVENING. IT WILL TAKE    
  SEVERAL HOURS FOR THE WATER TO RECEDE. IT IS POSSIBLE THAT MORE    
  SHOWERS WELL TO THE WEST MAY BRING ADDITIONAL RAINFALL TO THE AREA 
  AFTER 730 PM. SMALL STREAMS ACROSS SOUTHERN NEW JERSEY MAY RISE    
  OUT OF THEIR BANKS THIS EVENING. CONTINUE TO MONITOR THE FLOODING  
  SITUATION ACROSS YOUR AREA AND MOVE TO HIGHER GROUND IF FLOODING   
  IS OBSERVED.  


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

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!

DRIVING INTO FLOOD WATERS COULD COST YOU YOUR LIFE...OR AT THE VERY
LEAST...THOUSANDS OF DOLLARS OF VEHICLE DAMAGE. NEARLY HALF OF ALL
FLASH FLOOD FATALITIES ARE AUTO RELATED. TURN AROUND...DON'T DROWN.

&&

LAT...LON 4007 7515 4005 7511 4005 7509 4001 7504
      3999 7506 3998 7501 3995 7502 3994 7498
      3989 7494 3969 7522 3956 7552 3959 7555
      3954 7556 3951 7564 3962 7571

$$

FORECASTER:PO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 2:51 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more	114 min
Jul 28, 3:14 PM EDT	Areal Flood Advisory	PHI	Bucks, Monroe, Northampton	3 hr
Jul 28, 3:22 PM EDT	Areal Flood Advisory	PHI	Delaware, Montgomery, Philadelphia	113 min
Jul 28, 4:15 PM EDT	Areal Flood Advisory	PHI	Bucks	2 hr
Jul 28, 6:56 PM EDT	Special Weather Statement	PHI	Chester	49 min
Jul 28, 2:42 PM EDT	Special Weather Statement	PHI	Gloucester	48 min
Jul 28, 2:57 PM EDT	Special Weather Statement	PHI	Morris	48 min
Jul 28, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Morris	39 min
Jul 28, 4:07 PM EDT	Special Weather Statement	PHI	Essex	38 min
Jul 28, 4:25 PM EDT	Special Weather Statement	PHI	Camden	50 min
Jul 28, 4:32 PM EDT	Special Weather Statement	PHI	Hunterdon, Somerset	58 min
Jul 28, 4:47 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	118 min
Jul 28, 5:19 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Somerset	3 hr
Jul 28, 5:39 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	36 min
Jul 28, 5:55 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	50 min
Jul 28, 5:58 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	2 hr
Jul 28, 6:28 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	3 hr
Jul 28, 6:38 PM EDT	Special Weather Statement	PHI	Burlington, Camden	37 min
Jul 28, 7:11 PM EDT	Special Weather Statement	PHI	Middlesex	49 min
Jul 28, 7:12 PM EDT	Areal Flood Advisory	PHI	Middlesex	2 hr
Jul 28, 7:29 PM EDT	Special Weather Statement	PHI	Burlington	31 min
Jul 28, 7:43 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	2 hr
Jul 28, 1:14 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	2 hr
Jul 28, 1:23 PM EDT	Areal Flood Advisory	PHI	New Castle	112 min
Jul 28, 1:42 PM EDT	Special Weather Statement	PHI	New Castle	48 min
Jul 28, 1:59 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	46 min
Jul 28, 3:04 PM EDT	Special Weather Statement	PHI	Sussex	41 min
Jul 28, 3:55 PM EDT	Areal Flood Advisory	PHI	Sussex	110 min
Jul 28, 5:07 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	113 min
Jul 28, 5:50 PM EDT	Special Weather Statement	PHI	Sussex	40 min
Jul 28, 7:54 PM EDT	Special Weather Statement	PHI	New Castle	36 min

Nearby

Flash Flood Warnings in New Jersey, 2013 Flash Flood Warnings in Pennsylvania, 2013 Flash Flood Warnings in Delaware, 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.