Alert archive / New Jersey / Flash Flood Warnings in 2017

Flash Flood Warning 42, NWS Philadelphia/Mount Holly

August 3, 2017Burlington County, Mercer County, New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 3, 2017, 5:17 PM EDT for Burlington County, Mercer County, New Jersey; Bucks County, Pennsylvania. It was in force for 4 hr. 22 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 3, 2017, 5:17 PM EDT (21:17 UTC)
Expired
Aug 3, 2017, 9:15 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Burlington County, NJ, Mercer County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 37 km from the middle of the area, began a volume at 21:19 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 3, 5:24 PM EDTHEAVY RAIN 2.471 Se Tullytown, PA1.42 INCHES OF RAIN IN 25 MINUTES.
Aug 3, 5:24 PM EDTHEAVY RAIN 2.471 Se Tullytown, PARAINFALL OF 1.42 INCHES IN 25 MINUTES.
Aug 3, 5:40 PM EDTHEAVY RAIN 2.95Florence, NJRAINFALL OF 0.90 INCHES IN 15 MINUTES.
Aug 3, 6:02 PM EDTFLOODMansfield, NJROUTE 130 NORTH JUST SOUTH OF KINKIRA ROAD IS IMPASSIBLE.
Aug 3, 6:06 PM EDTFLOODBristol Twp, PASEVERAL ROADS CLOSED WITH WATER UP TO 2 FT DEEP.
Aug 3, 6:18 PM EDTHEAVY RAIN 3.24Florence Twp, NJRAINFALL OF 1.11 INCHES IN 16 MINUTES.
Aug 3, 6:20 PM EDTFLOODMansfield Twp, NJI-295 NORTH AT EXIT 52 - COLUMBUS ROAD PARTIAL RAMP CLOSURE
Aug 3, 6:22 PM EDTHEAVY RAIN 3.061 Ne Burlington Twp, NJRAINFALL OF 1.15 INCHES IN 15 MINUTES.
Aug 3, 6:30 PM EDTFLOODFlorence, NJALL LANES CLOSED ON US-130 IN BOTH DIRECTIONS NORTH OF CR-656/FLORENCE - COLUMBUS ROAD
Aug 3, 6:32 PM EDTFLOODBurlington Twp, NJALL LANES IN BOTH DIRECTIONS CLOSED ON US-130 NORTHBOUND AT NECK ROAD.
Aug 3, 7:00 PM EDTFLOODBurlington, NJFLOOD WATERS INTO THE SAVE A LOT AND ROGER WILCO STORES ON ROUTE 130 IN BURLINGTON.
Aug 3, 7:00 PM EDTFLOODFlorence, NJWIDESPREAD ROADWAY FLOODING.
Aug 3, 7:00 PM EDTHEAVY RAIN 4.52 Sw Burlington Twp, NJ80-MINUTE RAINFALL
Aug 3, 7:06 PM EDTHEAVY RAIN 4.55Burlington, NJTWO-HOUR RAINFALL
Aug 3, 7:10 PM EDTHEAVY RAIN 5Burlington, NJ
Aug 3, 7:13 PM EDTHEAVY RAIN 51 Ne Burlington Twp, NJ
Aug 3, 7:17 PM EDTHEAVY RAIN 4.05Florence Twp, NJ
Aug 3, 7:25 PM EDTFLASH FLOODBurlington Twp, NJSEVERAL APARTMENTS ARE FLOODED ON BRITTANY COURT.
Aug 3, 7:25 PM EDTFLASH FLOODBurlington Twp, NJSEVERAL APARTMENTS ARE FLOODING ON BRITTANY COURT.
Aug 3, 7:25 PM EDTHEAVY RAIN 4.221 Se Stevens, NJ
Aug 3, 7:28 PM EDTHEAVY RAIN 4.341 Se Tullytown, PA
Aug 3, 7:35 PM EDTFLASH FLOODBurlington Twp, NJWATER IS ENTERNG A HOUSE ON CORNELL ROAD DUE TO A NEARBY CREEK OVERFLOWING ITS BANKS.

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 12:00Z, 9.3 hours before the alert went out and 182 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 12:00Z on 2017-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 207 joules per kilogram.LCLLFCEL10008507005003002001001 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, Brookhaven, NY at 12:00Z on 2017-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 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
207 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
895 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

268 
WGUS51 KPHI 032117
FFWPHI
NJC005-021-PAC017-040115-
/O.NEW.KPHI.FF.W.0042.170803T2117Z-170804T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
517 PM EDT THU AUG 3 2017

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Southeastern Mercer County in central New Jersey...
  Northwestern Burlington County in southern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...

* Until 915 PM EDT

* At 516 PM EDT...Doppler radar and automated rain gauges indicated
  thunderstorms producing heavy rain across the warned area. Up to 
  two inches of rain have already fallen in a little over a half 
  hour, especially near Florence. Flash flooding is expected to 
  begin shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Trenton, Bensalem, Willingboro, Florence, Burlington, Bristol,
  Bordentown, Beverly, Tullytown, Allentown, Windsor,
  Florence-Roebling, Jacksonville, Georgetown, Edinburg, Crosswicks,
  White Horse, Mercerville-Hamilton Square, Levittown and Columbus.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

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.

&&

LAT...LON 3999 7491 4009 7496 4012 7496 4012 7498
      4014 7499 4028 7460 4020 7456 4018 7457
      4018 7461 4009 7456

$$

CMS
3 follow-up statements
951 
WGUS71 KPHI 032212
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
612 PM EDT THU AUG 3 2017

NJC005-021-PAC017-040115-
/O.CON.KPHI.FF.W.0042.000000T0000Z-170804T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mercer NJ-Burlington NJ-Bucks PA-
612 PM EDT THU AUG 3 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
SOUTHEASTERN MERCER...NORTHWESTERN BURLINGTON AND SOUTHEASTERN BUCKS
COUNTIES...

At 610 PM EDT...Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain over the warned area. Up to four 
inches of rain have fallen in the past hour and a half, with 
flooding being reported on US Highway 130 near Burlington. This is a 
dangerous situation. Flash flooding is imminent.

Some locations that could experience flooding include...
Trenton, Bensalem, Willingboro, Florence, Burlington, Bristol,
Bordentown, Beverly, Tullytown, Allentown, Windsor,
Florence-Roebling, Jacksonville, Georgetown, Edinburg, Crosswicks,
White Horse, Mercerville-Hamilton Square, Levittown and Columbus.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

&&

LAT...LON 3999 7491 4009 7496 4012 7496 4012 7498
      4014 7499 4028 7460 4020 7456 4018 7457
      4018 7461 4009 7456

$$

CMS
814 
WGUS71 KPHI 032305
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
705 PM EDT THU AUG 3 2017

NJC005-021-PAC017-040115-
/O.CON.KPHI.FF.W.0042.000000T0000Z-170804T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mercer NJ-Burlington NJ-Bucks PA-
705 PM EDT THU AUG 3 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
SOUTHEASTERN MERCER...NORTHWESTERN BURLINGTON AND SOUTHEASTERN BUCKS
COUNTIES...

At 703 PM EDT...Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain over the warned area. Widespread 
three to five inch totals have been reported in southeast Bucks 
County and far northwest Burlington County. Road closures from 
flooding have been reported on US Highway 130 near Florence and in 
Burlington Township. This is a dangerous situation.

Some locations that could experience flooding include...
Trenton, Bensalem, Willingboro, Florence, Burlington, Bristol,
Bordentown, Beverly, Tullytown, Allentown, Windsor,
Florence-Roebling, Jacksonville, Georgetown, Edinburg, Crosswicks,
White Horse, Mercerville-Hamilton Square, Levittown and Columbus.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

&&

LAT...LON 3999 7491 4009 7496 4012 7496 4012 7498
      4014 7499 4028 7460 4020 7456 4018 7457
      4018 7461 4009 7456

$$

CMS
486 
WGUS71 KPHI 032344
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
744 PM EDT THU AUG 3 2017

NJC005-021-PAC017-040115-
/O.CON.KPHI.FF.W.0042.000000T0000Z-170804T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mercer NJ-Burlington NJ-Bucks PA-
744 PM EDT THU AUG 3 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
SOUTHEASTERN MERCER...NORTHWESTERN BURLINGTON AND SOUTHEASTERN BUCKS
COUNTIES...

At 742 PM EDT...local law enforcement reported flash flooding in 
Burlington Township and in Florence. Numerous roads are closed, and 
apartments are beginning to flood in Brittany Court in Burlington 
Township. This is a dangerous situation.

Some locations that could experience flooding include...
Trenton, Bensalem, Willingboro, Florence, Burlington, Bristol,
Bordentown, Beverly, Tullytown, Allentown, Windsor,
Florence-Roebling, Jacksonville, Georgetown, Edinburg, Crosswicks,
White Horse, Mercerville-Hamilton Square, Levittown and Columbus.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

&&

LAT...LON 3999 7491 4009 7496 4012 7496 4012 7498
      4014 7499 4028 7460 4020 7456 4018 7457
      4018 7461 4009 7456

$$

CMS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 2:47 PM EDTSpecial Marine WarningPHI58 min
Aug 3, 3:35 PM EDTSpecial Marine WarningPHI85 min
Aug 3, 4:44 PM EDTSpecial Weather StatementPHIMercer31 min
Aug 3, 4:47 PM EDTSpecial Marine WarningPHI88 min
Aug 3, 4:51 PM EDTSpecial Weather StatementPHISalem24 min
Aug 3, 5:07 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Monmouth, Ocean38 min
Aug 3, 5:42 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer48 min
Aug 3, 5:54 PM EDTSpecial Weather StatementPHISomerset36 min
Aug 3, 6:06 PM EDTSevere Thunderstorm WarningPHIBurlington39 min
Aug 3, 6:38 PM EDTAreal Flood AdvisoryPHIBurlington, Camden4 hr
Aug 3, 6:50 PM EDTSpecial Weather StatementPHIMercer55 min
Aug 3, 6:54 PM EDTSpecial Weather StatementPHIHunterdon66 min
Aug 3, 7:25 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer4 hr
Aug 3, 7:34 PM EDTSpecial Weather StatementPHIHunterdon, Mercer41 min
Aug 3, 7:47 PM EDTSpecial Weather StatementPHIMorris43 min
Aug 3, 3:31 PM EDTSpecial Weather StatementPHIBucks, Philadelphia44 min
Aug 3, 5:57 PM EDTSpecial Weather StatementPHIDelaware33 min
Aug 3, 6:15 PM EDTSpecial Weather StatementPHIPhiladelphia30 min
Aug 3, 6:34 PM EDTSpecial Weather StatementPHILehigh41 min
Aug 3, 7:16 PM EDTSpecial Weather StatementPHILehigh44 min
Aug 3, 7:37 PM EDTSpecial Weather StatementPHILehigh38 min

Nearby

Flash Flood Warnings in New Jersey, 2017Flash Flood Warnings in Pennsylvania, 2017Every flash flood warning in 2017

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.