Alert archive / New Jersey / Flash Flood Warnings in 2019

Flash Flood Warning 29, NWS Philadelphia/Mount Holly

June 20, 2019Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 20, 2019, 1:49 AM EDT for Burlington County, New Jersey. It was in force for 3 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
Jun 20, 2019, 1:49 AM EDT (05:49 UTC)
Expired
Jun 20, 2019, 4:42 AM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Burlington County, NJ

The radar

The Philadelphia radar (KDIX), 37 km from the middle of the area, began a volume at 05:52 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
Jun 20, 2:10 AM EDTFLASH FLOODMount Holly, NJTHE RIVER GAUGE ON THE NORTH BRANCH OF THE RANCOCAS CREEK AT IRONWORKS PARK REACHED FLOOD STAGE.
Jun 20, 3:00 AM EDTFLASH FLOOD2 S Vincentown, NJFLASH FLOODING ON U.S. HIGHWAY 206 NEAR RIDGE ROAD IN SOUTHAMPTON TWP. TIME ESTIMATED FROM RADAR AND NEARBY REPORTS.
Jun 20, 3:15 AM EDTFLASH FLOOD1 Nne Maple Shade, NJNJ ROUTE 73 CLOSED IN BOTH DIRECTIONS AROUND NORTH STILES AVENUE.
Jun 20, 3:30 AM EDTFLASH FLOOD1 E Maple Shade, NJCORRECTS TIME OF PREVIOUS FLASH FLOOD REPORT FROM 1 E MAPLE SHADE BASED ON INFORMATION FROM LAW ENFORCEMENT. NEW ALBANY ROAD CLOSED BETWEEN LENOLA ROAD AND CAMDEN AVENUE FROM FLOOD DAMAGE. FLOODING ALSO CAUSED TREES TO FALL ON MOUNT LAUREL ROAD NEAR ROUTE 38.
Jun 20, 3:30 AM EDTFLASH FLOOD2 Ssw Evesham Twp, NJSTATE HIGHWAY 73 NORTHBOUND NEAR COUNTY ROAD 685 CLOSED FROM FLOODING. TIME ESTIMATED FROM NEARBY SOCIAL MEDIA REPORTS.
Jun 20, 3:30 AM EDTHEAVY RAIN 6.592 Ssw Medford, NJ3.5 INCHES OF RAIN FELL BETWEEN 7:30 PM AND 10 PM ON 6/19 WITH AN ADDITIONAL 2.59 INCHES BETWEEN 2 AM AND 3 AM ON 6/20.
Jun 20, 3:55 AM EDTFLASH FLOODMedford Twp., NJTHE RIVER GAUGE ON THE SOUTHWEST BRANCH OF THE RANCOCAS CREEK REACHED FLOOD STAGE.

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, 5.8 hours before the alert went out and 193 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, Brookhaven, NY at 00:00Z on 2019-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2019-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.19395878Sfc1 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
4 J/kg
Mixed-layer CIN
-209 J/kg
Mixed-layer LCL
449 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

775 
WGUS51 KPHI 200549
FFWPHI
NJC005-201145-
/O.NEW.KPHI.FF.W.0029.190620T0549Z-190620T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
149 AM EDT Thu Jun 20 2019

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Northern Burlington County in southern New Jersey...

* Until 745 AM EDT.

* At 145 AM EDT, Doppler radar indicated additional showers and 
  thunderstorms producing heavy rain moving into the warned area. 
  Conditions are saturated and additional flash flooding is expected 
  to occur in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Evesham, Mount Laurel, Willingboro, Medford, Lumberton, Florence, 
  Burlington, Mount Holly, Riverside, Palmyra, Bordentown, Beverly, 
  Pemberton, Wrightstown, Ramblewood, Marlton and Leisuretowne.

Additional rainfall amounts in excess of an inch are possible in the 
warned area.

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 poor drainage areas and low lying spots.

&&

LAT...LON 3979 7483 3978 7489 3988 7493 3994 7498
      3995 7502 3998 7501 3999 7506 4007 7494
      4008 7487 4013 7482 4012 7478 4014 7474
      4019 7470 4013 7458 3998 7450

$$

Iovino
1 follow-up statement
628 
WGUS71 KPHI 200842
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
442 AM EDT Thu Jun 20 2019

NJC005-200852-
/O.CAN.KPHI.FF.W.0029.000000T0000Z-190620T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-
442 AM EDT Thu Jun 20 2019

...THE FLASH FLOOD WARNING FOR NORTHERN BURLINGTON COUNTY IS
CANCELLED...

The Flash Flood Warning has been converted to an areal Flood Warning 
and it is in effect until 4:30 PM this afternoon. Please continue to 
heed any road closures.

LAT...LON 3979 7483 3978 7489 3988 7493 3994 7498
      3995 7502 3998 7501 3999 7506 4007 7494
      4008 7487 4013 7482 4012 7478 4014 7474
      4019 7470 4013 7458 3998 7450

$$

Iovino

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 8:36 PM EDTAreal Flood AdvisoryPHIOcean2 hr
Jun 19, 8:39 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Ocean2 hr
Jun 19, 11:19 PM EDTFlash Flood WarningPHICamden, Gloucester, Salem5 hr
Jun 19, 11:25 PM EDTAreal Flood WarningPHIBurlington5 hr
Jun 20, 4:32 AM EDTMarine Dense Fog AdvisoryPHI5 hr
Jun 20, 4:38 AM EDTAreal Flood WarningPHIBurlington, Camden, Gloucester14 hr
Jun 20, 2:26 PM EDTSpecial Weather StatementPHIGloucester, Hunterdon, Salem, Somerset94 min
Jun 20, 2:33 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem57 min
Jun 20, 2:48 PM EDTFlash Flood WarningPHIBurlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 1 more4 hr
Jun 20, 3:20 PM EDTFlash Flood WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more4 hr
Jun 20, 3:21 PM EDTSpecial Weather StatementPHIAtlantic24 min
Jun 20, 3:36 PM EDTSpecial Weather StatementPHIBurlington, Mercer, Middlesex, Ocean54 min
Jun 20, 4:05 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Middlesex, Monmouth, Ocean4 hr
Jun 20, 4:06 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean54 min
Jun 20, 4:23 PM EDTSpecial Weather StatementPHICumberland37 min
Jun 20, 4:24 PM EDTAreal Flood AdvisoryPHIMercer, Middlesex, Monmouth, Morris, Somerset3 hr
Jun 20, 4:26 PM EDTSpecial Marine WarningPHI64 min
Jun 20, 4:40 PM EDTSpecial Weather StatementPHIOcean35 min
Jun 20, 4:44 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean31 min
Jun 20, 5:10 PM EDTSpecial Weather StatementPHIAtlantic35 min
Jun 20, 5:15 PM EDTSpecial Marine WarningPHI90 min
Jun 20, 6:50 PM EDTAreal Flood WarningPHIBurlington10 hr

Nearby

Flash Flood Warnings in New Jersey, 2019Every flash flood warning in 2019

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.