Alert archive / New Jersey / Flash Flood Warnings in 2014

Flash Flood Warning 52, NWS Philadelphia/Mount Holly

August 12, 2014Atlantic County, Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 12, 2014, 10:33 PM EDT for Atlantic County, Cumberland County, New Jersey. 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
Aug 12, 2014, 10:33 PM EDT (02:33 UTC)
Expired
Aug 13, 2014, 2:30 AM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Atlantic County, NJ, Cumberland County, NJ

The radar

The Philadelphia radar (KDIX), 57 km from the middle of the area, began a volume at 02:36 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

TimeReportWhereRemark
Aug 12, 10:45 PM EDTFLASH FLOODVineland, NJINTERSECTIONS QUICKLY FLOODED WITH SEVERAL VEHICLES STUCK. SOME PEOPLE NEEDED ASSISTANCE GETTING OUT OF THEIR TRAPPED VEHICLE.
Aug 12, 11:45 PM EDTHEAVY RAIN 5.222 Sse North Vineland, NJ
Aug 12, 11:45 PM EDTHEAVY RAIN 6.41 Nw Leamings Mill, NJ
Aug 13, 12:35 AM EDTFLASH FLOOD1 Wnw Mckee City, NJUS 322 AND COLOGNE AVE CLOSED DUE TO HIGH WATER
Aug 13, 1:10 AM EDTFLASH FLOOD1 Ne Cardiff, NJFRANKLIN AVE NEAR US 40 CLOSED DUE TO HIGH WATER
Aug 13, 2:00 AM EDTHEAVY RAIN 5.58Atlantic City Airport, NJ
Aug 13, 2:30 AM EDTHEAVY RAIN 3.93Oceanville, NJ

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, 2.6 hours before the alert went out and 183 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2014-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1513 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2014-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

105 
WGUS51 KPHI 130233
FFWPHI
NJC001-011-130630-
/O.NEW.KPHI.FF.W.0052.140813T0233Z-140813T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1033 PM EDT TUE AUG 12 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  NORTHEASTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF VINELAND...

* UNTIL 230 AM EDT

* AT 1030 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BUENA...
  WEYMOUTH...SOUTH VINELAND...PORT REPUBLIC...POMONA...MIZPAH...MAYS
  LANDING...EGG HARBOR CITY...ELWOOD-MAGNOLIA AND ABSECON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 ARE POSSIBLE IN THE WARNED AREA.

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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MOUNT
HOLLY NJ.

&&

LAT...LON 3938 7444 3929 7473 3932 7486 3932 7492
      3946 7507 3950 7508 3954 7503 3952 7498
      3963 7484 3959 7455 3957 7454 3956 7445
      3954 7444 3956 7442 3949 7437 3950 7434

$$

JRK
2 follow-up statements
295 
WGUS71 KPHI 130514
FFSPHI

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

NJC001-011-130630-
/O.CON.KPHI.FF.W.0052.000000T0000Z-140813T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATLANTIC NJ-CUMBERLAND NJ-
114 AM EDT WED AUG 13 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM EDT FOR
NORTHEASTERN CUMBERLAND AND ATLANTIC COUNTIES...

AT 101 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY 
RAIN OVER EASTERN ATLANTIC COUNTY. RAINFALL OF 4 TO 6 INCHES WAS 
ESTIMATED BY THE RADAR ACROSS THE WARNED AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BUENA...
WEYMOUTH...PORT REPUBLIC...MIZPAH...EGG HARBOR CITY AND
ELWOOD-MAGNOLIA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF UP TO 1 INCH ARE POSSIBLE IN EASTERN 
ATLANTIC COUNTY.

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 3938 7444 3929 7473 3932 7486 3932 7492
      3946 7507 3950 7508 3954 7503 3952 7498
      3963 7484 3959 7455 3957 7454 3956 7445
      3954 7444 3956 7442 3949 7437 3950 7434

$$

JRK
205 
WGUS71 KPHI 130627
FFSPHI

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

NJC001-011-130637-
/O.EXP.KPHI.FF.W.0052.000000T0000Z-140813T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ATLANTIC NJ-CUMBERLAND NJ-
227 AM EDT WED AUG 13 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 230 AM EDT FOR NORTHEASTERN
CUMBERLAND AND ATLANTIC COUNTIES...

THE HEAVY RAIN HAS EXITED THE AREA AND FLASH FLOODING IS NO LONGER 
EXPECTED. THE FLASH FLOOD WARNING HAS BEEN REPLACED BY A FLOOD 
WARNING. 

LAT...LON 3938 7444 3929 7473 3932 7486 3932 7492
      3946 7507 3950 7508 3954 7503 3952 7498
      3963 7484 3959 7455 3957 7454 3956 7445
      3954 7444 3956 7442 3949 7437 3950 7434

$$

JRK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 8:11 PM EDTFlash Flood WarningPHICumberland6 hr
Aug 12, 10:03 PM EDTAreal Flood AdvisoryPHIAtlantic, Cape May4 hr
Aug 12, 11:07 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cumberland53 min
Aug 12, 11:25 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Gloucester, Ocean5 hr
Aug 12, 11:31 PM EDTSpecial Marine WarningPHI59 min
Aug 13, 12:27 AM EDTSpecial Marine WarningPHI93 min
Aug 13, 12:36 AM EDTSpecial Weather StatementPHIAtlantic, Ocean54 min
Aug 13, 1:03 AM EDTFlash Flood WarningPHIAtlantic, Burlington, Ocean4 hr
Aug 13, 1:08 AM EDTSpecial Weather StatementPHIAtlantic37 min
Aug 13, 1:25 AM EDTSpecial Marine WarningPHI95 min
Aug 13, 1:39 AM EDTAreal Flood AdvisoryPHIMonmouth4 hr
Aug 13, 1:53 AM EDTSpecial Marine WarningPHI82 min
Aug 13, 2:26 AM EDTAreal Flood WarningPHIAtlantic, Cumberland6 hr
Aug 13, 12:28 PM EDTRip Current StatementPHIAtlantic, Cape May, Monmouth, Ocean8 hr
Aug 13, 4:07 PM EDTSpecial Weather StatementPHISussex53 min

Nearby

Flash Flood Warnings in New Jersey, 2014Every 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.