Alert archive / New Jersey / Flash Flood Warnings in 2010

Flash Flood Warning 11, NWS Philadelphia/Mount Holly

July 14, 20104 counties in New Jersey; New Castle County, Delaware; Delaware County, Montgomery County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 14, 2010, 2:11 PM EDT for 4 counties in New Jersey; New Castle County, Delaware; Delaware County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 109 min. 9 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, 2010, 2:11 PM EDT (18:11 UTC)
Expired: Jul 14, 2010, 4:00 PM EDT
In force: 109 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

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

The radar

The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 18:14 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, 2:20 PM EDT	FLASH FLOOD	1 W Elsmere, DE	* 1 INJ * EVACUATIONS DUE TO FLASH FLOODING IN PRICES CORNER, INCLUDING A FEW BUSINESSES AND A DAYCARE. THREE FEET OF WATER FLOODED KIRKWOOD HIGHWAY BETWEEN MAPLE AVE AND SAUNDERS ROAD. FOURTEEN CARS PARKED AT THE VETERANS HOSPITAL WERE DAMAGED WHEN SUBMER
Jul 14, 2:30 PM EDT	FLASH FLOOD	Norwood, PA	STREET FLOODING REPORTED IN NORWOOD, PROSPECT PARK, TINICUM TOWNSHIP, AND CHESTER CITY. FLOODING REPORTED TO BE 4 FEET DEEP IN SOME AREAS.
Jul 14, 2:30 PM EDT	FLASH FLOOD	Trainer, PA	STONEY BROOK CREEK OUT OF ITS BANKS. TIME APPROXIMATE.
Jul 14, 2:50 PM EDT	FLASH FLOOD	1 W Elsmere, DE	EVACUATIONS DUE TO FLASH FLOODING IN PRICES CORNER, INCLUDING A FEW BUSINESSES AND A DAYCARE.
Jul 14, 2:50 PM EDT	FLASH FLOOD	Wilmington, DE	TWO RESCUES OF CARS STUCK IN WATER. TIME APPROXIMATE.
Jul 14, 3:30 PM EDT	FLASH FLOOD	Cherry Hill, NJ	NORTHBOUND ROUTE 73 STILL CLOSED AT GREENTREE ROAD AS OF ABOUT 6PM. TIME ESTIMATED FOR BEGINNING OF CLOSURE.
Jul 14, 3:30 PM EDT	FLASH FLOOD	Paulsboro, NJ	AS OF 6PM RTE 44 STILL CLOSED AT BERKLEY ROAD. TIME ESTIMATED FOR THE BEGINNING OF THE CLOSURE.
Jul 14, 3:45 PM EDT	FLASH FLOOD	Mount Laurel, NJ	STREET FLOODING REPORTED ALONG CORNWALL ROAD IN MOUNT LAUREL.
Jul 14, 4:03 PM EDT	FLASH FLOOD	Pennsauken, NJ	3.65 INCHES OF RAIN FELL BETWEEN 132 PM AND 403 PM AT INTERSECTION OF FEDERAL STREET AND ROUTE 130. STREET FLOODING RESULTED WITH CLOSINGS ALONG ADMIRAL WILSON BLVD FROM 15TH STREET TO FEDERAL STREET. ADDITIONAL CLOSINGS REPORTED ALONG ROUTE 130 FROM TERRACE A

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.2 hours before the alert went out and 79 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: 181 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 495 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

389 
WGUS51 KPHI 141811
FFWPHI
DEC003-NJC005-007-015-033-PAC045-091-101-142000-
/O.NEW.KPHI.FF.W.0011.100714T1811Z-100714T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
211 PM EDT WED JUL 14 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF WILMINGTON...
  DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  EXTREME SOUTH CENTRAL MONTGOMERY COUNTY IN SOUTHEAST
  PENNSYLVANIA...
  SOUTHERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF PHILADELPHIA...
  WEST CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAMDEN...
  NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 400 PM EDT

* AT 203 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
EXCESSIVE SHORT RAINFALL OVER HEAVY SHOWERS AND SCATTERED 
THUNDERSTORMS OVER THE WARNED AREA.  THIS BAND OF SHOWERS OVER THE 
INTERSTATE 95 CORRIDOR WERE NEARLY STATIONARY.  THESE ARE EXPECTED 
TO DRIFT SOUTHEAST AFTER 330 PM.  RAINFALL OF 1 TO 2 INCHES IN AN 
HOUR IS EXPECTED WITH WIDESPREAD POOR DRAINAGE STREET FLOODING.  BE 
PREPARED FOR TRAVEL DELAYS ON THE LATE AFTERNOON COMMUTE. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO YEADON...
  WISSINOMING...TACONY...ROXBOROUGH...MORRIS PARK...KENSINGTON...
  CENTER CITY...MOUNT LAUREL...NARBERTH...EAST LANSDOWNE...DREXEL
  HILL...BROOMALL AND PALMYRA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF A FEW 
SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. 
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF 
CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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.

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. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3991 7486 3968 7551 3969 7552 3966 7557
      3972 7579 4004 7528 4003 7501

$$


DRAG

1 follow-up statement

378 
WGUS71 KPHI 141932
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
332 PM EDT WED JUL 14 2010

DEC003-NJC005-007-015-033-PAC045-091-101-142000-
/O.CON.KPHI.FF.W.0011.000000T0000Z-100714T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SALEM NJ-CAMDEN NJ-GLOUCESTER NJ-DELAWARE PA-PHILADELPHIA PA-
MONTGOMERY PA-NEW CASTLE DE-BURLINGTON NJ-
332 PM EDT WED JUL 14 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR WEST
CENTRAL BURLINGTON...NORTHERN NEW CASTLE...EXTREME SOUTH CENTRAL
MONTGOMERY...SOUTHERN PHILADELPHIA...DELAWARE...NORTHWESTERN
GLOUCESTER...NORTHWESTERN CAMDEN AND NORTHWESTERN SALEM COUNTIES...

AT 324 PM EDT...THE SHOWERS AND STORMS WERE WEAKENING BUT STILL 
CONTRIBUTING TO POCKETS OF FLASH FLOODING FROM NEAR WILMINGTON 
DELAWARE TO PHILADELPHIA. OVER 1.75 INCHES OF RAIN FELL WITHIN 2 
HOURS AT PHILADELPHIA INTERNATIONAL AIRPORT. 

THE WHITE CLAY CREEK NEAR NEWARK DELAWARE WAS RISING EXTREMELY FAST 
TOWARD BANKFULL.   

LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH FLOODING OVER PARTS 
OF THE WARNED AREA INCLUDING EVACUATIONS.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WISSINOMING...TACONY...SOUTH PHILADELPHIA...ROXBOROUGH...PHILADELPHIA
INTERNATIONAL AIRPORT...MORRIS PARK...KENSINGTON...ELAM...
CONCORDVILLE...CHELSEA...CENTER CITY...WEST DEPTFORD...SPRINGDALE...
MOUNT LAUREL...GREENTREE...DEPTFORD...YEADON...SWARTHMORE...
PHILADELPHIA...NETHER PROVIDENCE TOWNSHIP...NARBERTH...LIMA...
FOLCROFT...EAST LANSDOWNE...DREXEL HILL...CHESTER...BROOMALL...
WOODBURY...WESTVILLE...PAULSBORO...PALMYRA...NATIONAL PARK...
MARLTON...MAGNOLIA...GLOUCESTER CITY...GIBBSTOWN...CHERRY HILL...
CAMDEN AND BELLMAWR

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 0.2 TO .5 INCHES ARE FORECAST IN THE 
WARNED AREA BY 430 PM.

THIS WARNING MAY EXTENDED AROUND 4PM FOR AN ADDITIONAL HOUR OR SO 
TO ACCOUNT FOR FURTHER RUNOFF BUT THE WORST OF THE RAIN HAS ALREADY 
OCCURRED.  

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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.

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. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3991 7486 3968 7551 3969 7552 3966 7557
      3972 7579 4004 7528 4003 7501

$$
DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:19 PM EDT	Special Weather Statement	PHI	Mercer	71 min
Jul 13, 11:08 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	62 min
Jul 13, 11:37 PM EDT	Special Weather Statement	PHI	Cape May	53 min
Jul 13, 11:43 PM EDT	Special Weather Statement	PHI	Camden	62 min
Jul 14, 12:08 AM EDT	Special Weather Statement	PHI	Atlantic, Cape May	67 min
Jul 14, 2:40 AM EDT	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	3 hr
Jul 14, 3:21 AM EDT	Special Marine Warning	PHI		39 min
Jul 14, 3:27 AM EDT	Areal Flood Advisory	PHI	Warren	3 hr
Jul 14, 3:37 AM EDT	Small Craft Advisory for Hazardous Seas	PHI		16 hr
Jul 14, 3:46 AM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester	3 hr
Jul 14, 3:49 AM EDT	Special Weather Statement	PHI	Morris	56 min
Jul 14, 3:59 AM EDT	Areal Flood Advisory	PHI	Mercer	3 hr
Jul 14, 4:08 AM EDT	Special Marine Warning	PHI		67 min
Jul 14, 4:10 AM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	65 min
Jul 14, 4:51 AM EDT	Special Weather Statement	PHI	Ocean	54 min
Jul 14, 5:26 AM EDT	Special Weather Statement	PHI	Ocean	64 min
Jul 14, 6:06 AM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Jul 14, 10:15 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 4 more	9 hr
Jul 14, 10:26 AM EDT	Areal Flood Advisory	PHI	Morris, Somerset	3 hr
Jul 14, 10:56 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jul 14, 12:47 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	3 hr
Jul 14, 1:35 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	115 min
Jul 14, 2:36 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Mercer, Middlesex, Monmouth and 2 more	3 hr
Jul 14, 3:12 PM EDT	Flash Flood Warning	PHI	Burlington, Mercer, Monmouth, Ocean	63 min
Jul 14, 4:03 PM EDT	Areal Flood Warning	PHI	Burlington, Camden, Gloucester, Salem	79 min
Jul 14, 7:58 PM EDT	Special Weather Statement	PHI	Mercer	62 min
Jul 13, 9:52 PM EDT	Special Weather Statement	PHI	New Castle	68 min
Jul 13, 10:22 PM EDT	Special Weather Statement	PHI	Kent, Sussex	63 min
Jul 14, 1:44 AM EDT	Special Weather Statement	PHI	New Castle	61 min
Jul 14, 2:52 AM EDT	Flash Flood Warning	PHI	New Castle	3 hr
Jul 14, 2:58 AM EDT	Special Weather Statement	PHI	Kent	62 min
Jul 14, 12:52 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jul 14, 1:29 AM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Jul 14, 2:32 AM EDT	Flash Flood Warning	PHI	Chester	3 hr
Jul 14, 3:52 AM EDT	Special Weather Statement	PHI	Carbon	53 min
Jul 14, 3:58 AM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	3 hr
Jul 14, 10:04 AM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Jul 14, 11:11 AM EDT	Flash Flood Warning	PHI	Berks	3 hr

Nearby

Flash Flood Warnings in New Jersey, 2010 Flash Flood Warnings in Pennsylvania, 2010 Flash Flood Warnings in Delaware, 2010 Every flash flood warning in 2010

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.