Alert archive / New Jersey / Flash Flood Warnings in 2014

Flash Flood Warning 50, NWS Philadelphia/Mount Holly

August 12, 2014Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 12, 2014, 8:11 PM EDT for Cumberland County, New Jersey. It was in force for 6 hr. 8 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: Aug 12, 2014, 8:11 PM EDT (00:11 UTC)
Expired: Aug 13, 2014, 2:29 AM EDT
In force: 6 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 55 km from the middle of the area, began a volume at 00:13 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
Aug 12, 9:15 PM EDT	FLASH FLOOD	Millville, NJ	NUMEROUS CARS STRANDED ALONG RT 47 IN MILLVILLE AND VINELAND
Aug 12, 9:30 PM EDT	FLASH FLOOD	Millville, NJ	SOME HOMES HAD PORTIONS OF THEIR FOUNDATION WASHED OUT DUE TO FLASH FLOODING.
Aug 12, 9:52 PM EDT	HEAVY RAIN 5.22	Millville Airport, NJ
Aug 12, 10:29 PM EDT	HEAVY RAIN 6.57	Millville Airport, NJ
Aug 12, 11:45 PM EDT	HEAVY RAIN 6.4	1 Nw Leamings Mill, NJ
Aug 12, 11:54 PM EDT	HEAVY RAIN 8.59	Millville Airport, NJ
Aug 12, 11:54 PM EDT	HEAVY RAIN 8.92	Millville Airport, NJ
Aug 13, 12:30 AM EDT	FLASH FLOOD	Millville, NJ	* 1 INJ * FLOOD WATERS LEAD TO BASEMENT WALL COLLAPSES IN THREE HOUSES ON RHODA DRIVE

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.2 hours before the alert went out and 148 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: 1513 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 469 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

816 
WGUS51 KPHI 130011
FFWPHI
NJC011-130415-
/O.NEW.KPHI.FF.W.0050.140813T0011Z-140813T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
811 PM EDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF MILLVILLE...

* UNTIL 1215 AM EDT

* AT 808 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  AN AREA OF VERY HEAVY RAIN WHICH WAS MOVING SLOWLY IN CUMBERLAND   
  COUNTY.  RADAR ESTIMATES OF AROUND 3 INCHES OF RAIN HAS FALLEN IN  
  PORTIONS OF THE WARNING AREA WITH LOCALLY HIGHER AMOUNTS.  

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORT
  ELIZABETH...NEWPORT...MAURICETOWN...LAUREL LAKE...CUMBERLAND...
  CEDARVILLE...BRICKSBORO AND DIVIDING CREEK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF AT LEAST 2 INCHES IS POSSIBLE IN THE 
WARNED AREA.

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.

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.

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 3920 7504 3920 7511 3919 7511 3918 7513
      3919 7516 3920 7518 3923 7518 3927 7525
      3946 7509 3938 7487

$$

3 follow-up statements

506 
WGUS71 KPHI 130226
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1026 PM EDT TUE AUG 12 2014

NJC011-130415-
/O.CON.KPHI.FF.W.0050.000000T0000Z-140813T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CUMBERLAND NJ-
1026 PM EDT TUE AUG 12 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR
EASTERN CUMBERLAND COUNTY...

AT 1019 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED A 
THUNDERSTORM PRODUCING FLASH FLOODING OVER THE WARNED AREA. NUMEROUS 
CARS WERE STRANDED IN THE MILLVILLE AND VINELAND AREA.

NATIONAL WEATHER SERVICE DOPPLER RADAR HAS ESTIMATED 4 TO 7 INCHES 
OF RAIN HAS FALLEN ACROSS THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORT
ELIZABETH...NEWPORT...MILLVILLE...MAURICETOWN...LAUREL LAKE...
LEESBURG...DIVIDING CREEK...CUMBERLAND AND BRICKSBORO

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

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

&&

LAT...LON 3920 7504 3920 7511 3919 7511 3918 7513
      3919 7516 3920 7518 3923 7518 3927 7525
      3946 7509 3938 7487

$$

JRK

355 
WGUS51 KPHI 130352
FFWPHI
NJC011-130715-
/O.EXT.KPHI.FF.W.0050.000000T0000Z-140813T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1152 PM EDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  EASTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF MILLVILLE...

* UNTIL 315 AM EDT

* AT 1143 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED ONGOING 
FLASH FLOODING IN THE WARNED AREA. WHILE THE HEAVIEST RAIN HAS 
EXITED THE AREA...EXCESSIVE RUNOFF FROM EARLIER VERY HEAVY RAINFALL 
WILL CONTINUE TO PRODUCE FLASH FLOODING. NATIONAL WEATHER SERVICE 
DOPPLER RADAR HAD ESTIMATED 5 TO 9 INCHES OF RAIN HAS FALLEN ACROSS 
THE WARNED AREA. THE AUTOMATED WEATHER STATION AT MILLVILLE AIRPORT 
ALSO REPORTED OVER 8 INCHES OF RAINFALL.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORT
  ELIZABETH...NEWPORT...MAURICETOWN...LAUREL LAKE...LEESBURG...
  DIVIDING CREEK...CUMBERLAND AND BRICKSBORO

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF LESS THAN ONE INCH ARE POSSIBLE IN 
THE WARNED AREA.

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.

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

&&

LAT...LON 3920 7504 3920 7511 3919 7511 3918 7513
      3919 7516 3920 7518 3923 7518 3927 7525
      3946 7509 3938 7487

$$

JRK

863 
WGUS71 KPHI 130629
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
229 AM EDT WED AUG 13 2014

NJC011-130638-
/O.CAN.KPHI.FF.W.0050.000000T0000Z-140813T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CUMBERLAND NJ-
229 AM EDT WED AUG 13 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN CUMBERLAND
COUNTY...

THE HEAVY RAIN HAS EXITED THE AREA AND FLASH FLOODING IS NO LONGER 
EXPECTED. THERE IS STILL ONGOING FLOODING FROM THE EARLIER HEAVY 
RAINFALL. THEREFORE, THE FLASH FLOOD WARNING HAS BEEN REPLACED BY A 
FLOOD WARNING.

LAT...LON 3920 7504 3920 7511 3919 7511 3918 7513
      3919 7516 3920 7518 3923 7518 3927 7525
      3946 7509 3938 7487

$$

JRK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 10:03 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May	4 hr
Aug 12, 10:33 PM EDT	Flash Flood Warning	PHI	Atlantic, Cumberland	4 hr
Aug 12, 11:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland	53 min
Aug 12, 11:25 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	5 hr
Aug 12, 11:31 PM EDT	Special Marine Warning	PHI		59 min
Aug 13, 12:27 AM EDT	Special Marine Warning	PHI		93 min
Aug 13, 12:36 AM EDT	Special Weather Statement	PHI	Atlantic, Ocean	54 min
Aug 13, 1:03 AM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Ocean	4 hr
Aug 13, 1:08 AM EDT	Special Weather Statement	PHI	Atlantic	37 min
Aug 13, 1:25 AM EDT	Special Marine Warning	PHI		95 min
Aug 13, 1:39 AM EDT	Areal Flood Advisory	PHI	Monmouth	4 hr
Aug 13, 1:53 AM EDT	Special Marine Warning	PHI		82 min
Aug 13, 2:26 AM EDT	Areal Flood Warning	PHI	Atlantic, Cumberland	6 hr
Aug 13, 12:28 PM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	8 hr
Aug 13, 4:07 PM EDT	Special Weather Statement	PHI	Sussex	53 min

Nearby

Flash Flood Warnings in New Jersey, 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.