Alert archive / New Jersey / Flash Flood Warnings in 2018

Flash Flood Warning 46, NWS Philadelphia/Mount Holly

July 27, 2018Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 27, 2018, 4:54 PM EDT for Middlesex County, New Jersey. It was in force for 4 hr. 3 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 27, 2018, 4:54 PM EDT (20:54 UTC)
Expired
Jul 27, 2018, 9:00 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 20:54 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
Jul 27, 5:00 PM EDTFLASH FLOOD1 Ssw Woodbridge, NJFLOODING ON SOUTHBOUND LANES OF I-95/NJ TURNPIKE NORTH OF EXIT 11.
Jul 27, 5:45 PM EDTFLASH FLOODCarteret, NJFLOODING REPORTED ON THE NEW JERSEY TURNPIKE SOUTH OF INTERCHANGE 12. TIME ESTIMATED.
Jul 27, 6:00 PM EDTFLASH FLOODPerth Amboy, NJREPORTS OF A WATER RESCUE IN PERTH AMBOY. TIME ESTIMATED

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, 8.9 hours before the alert went out and 124 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 2018-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 752 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 2018-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
752 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
998 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

726 
WGUS51 KPHI 272054
FFWPHI
NJC023-280100-
/O.NEW.KPHI.FF.W.0046.180727T2054Z-180728T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
454 PM EDT FRI JUL 27 2018

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Northeastern Middlesex County in northern New Jersey...

* Until 900 PM EDT.

* At 453 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  New Brunswick, Perth Amboy, Edison, East Brunswick, Carteret,
  Colonia, Woodbridge, Metuchen, Iselin, Sewaren, Port Reading, Fords
  and Avenel.

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.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4049 7428 4048 7440 4060 7440 4061 7431
      4059 7429 4060 7426 4060 7421 4059 7420

$$

Meola
1 follow-up statement
117 
WGUS71 KPHI 272343
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
743 PM EDT FRI JUL 27 2018

NJC023-280100-
/O.CON.KPHI.FF.W.0046.000000T0000Z-180728T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-
743 PM EDT FRI JUL 27 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM EDT FOR
NORTHEASTERN MIDDLESEX COUNTY...

At 742 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Mesonet sites report 3 to 5 inches of 
rain has fallen in the Woodbridge and Carteret areas. Flash flooding 
is occurring and expected to continue.

Some locations that could experience flooding include...
New Brunswick, Perth Amboy, Edison, East Brunswick, Carteret,
Colonia, Woodbridge, Metuchen, Iselin, Sewaren, Port Reading, Fords
and Avenel.

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.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 4056 7421 4055 7425 4050 7426 4050 7428
      4049 7428 4048 7440 4060 7440 4061 7431
      4059 7429 4060 7426 4060 7421 4059 7420

$$

Meola

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 9:29 AM EDTSpecial Weather StatementPHISalem61 min
Jul 27, 9:50 AM EDTFlash Flood WatchPHIBurlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 7 more13 hr
Jul 27, 10:08 AM EDTSpecial Weather StatementPHICumberland67 min
Jul 27, 10:34 AM EDTRip Current StatementPHIAtlantic, Cape May, Monmouth, Ocean10 hr
Jul 27, 11:11 AM EDTSpecial Weather StatementPHIAtlantic64 min
Jul 27, 12:10 PM EDTSpecial Weather StatementPHIAtlantic65 min
Jul 27, 12:24 PM EDTAreal Flood AdvisoryPHICape May114 min
Jul 27, 1:15 PM EDTSpecial Weather StatementPHISalem45 min
Jul 27, 1:23 PM EDTSpecial Weather StatementPHIMorris52 min
Jul 27, 1:31 PM EDTSpecial Marine WarningPHI59 min
Jul 27, 1:38 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset4 hr
Jul 27, 2:04 PM EDTSevere Thunderstorm WarningPHIMorris, Somerset41 min
Jul 27, 2:14 PM EDTSevere Thunderstorm WarningPHICumberland, Salem46 min
Jul 27, 2:19 PM EDTSpecial Marine WarningPHI56 min
Jul 27, 2:22 PM EDTSpecial Marine WarningPHI53 min
Jul 27, 2:26 PM EDTAreal Flood AdvisoryPHICumberland, Salem6 hr
Jul 27, 2:40 PM EDTSpecial Marine WarningPHI65 min
Jul 27, 2:59 PM EDTSevere Thunderstorm WarningPHICumberland, Salem46 min
Jul 27, 3:09 PM EDTAreal Flood AdvisoryPHICumberland, Salem6 hr
Jul 27, 3:14 PM EDTSpecial Marine WarningPHI61 min
Jul 27, 3:45 PM EDTSpecial Weather StatementPHICumberland30 min
Jul 27, 4:12 PM EDTSpecial Marine WarningPHI63 min
Jul 27, 4:18 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland, Gloucester, Salem42 min
Jul 27, 4:19 PM EDTFlash Flood WarningPHICumberland4 hr
Jul 27, 4:25 PM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset7 hr
Jul 27, 4:32 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Somerset43 min
Jul 27, 4:43 PM EDTAreal Flood AdvisoryPHIMercer5 hr
Jul 27, 5:03 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cumberland4 hr
Jul 27, 5:23 PM EDTSpecial Marine WarningPHI67 min
Jul 27, 5:46 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Cumberland, Ocean4 hr
Jul 27, 6:10 PM EDTAreal Flood AdvisoryPHIMercer, Middlesex, Monmouth, Somerset4 hr
Jul 27, 7:14 PM EDTSpecial Marine WarningPHI61 min
Jul 27, 7:15 PM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset, Sussex, Warren4 hr
Jul 27, 7:51 PM EDTSpecial Weather StatementPHIAtlantic39 min
Jul 27, 7:55 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Somerset, Warren108 min

Nearby

Flash Flood Warnings in New Jersey, 2018Every flash flood warning in 2018

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.