Alert archive / New Jersey / Flash Flood Warnings in 2019

Flash Flood Warning 18, NWS Philadelphia/Mount Holly

June 18, 2019Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 18, 2019, 2:36 PM EDT for Middlesex County, Monmouth County, New Jersey. It was in force for 3 hr. 1 report 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 18, 2019, 2:36 PM EDT (18:36 UTC)
Expired: Jun 18, 2019, 5:41 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Middlesex County, NJ, Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 47 km from the middle of the area, began a volume at 18:39 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
Jun 18, 3:08 PM EDT	FLOOD	1 S Red Bank, NJ	MPING REPORT OF STREET FLOODING WITH ROADS CLOSED AND VEHICLES STRANDED.

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, 6.6 hours before the alert went out and 122 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: 78 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 453 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

815 
WGUS51 KPHI 181836
FFWPHI
NJC023-025-182230-
/O.NEW.KPHI.FF.W.0018.190618T1836Z-190618T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
236 PM EDT Tue Jun 18 2019

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  East central Monmouth County in central New Jersey...
  Southern Middlesex County in northern New Jersey...

* Until 630 PM EDT.

* At 235 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...
  Long Branch, Asbury Park, Old Bridge, Marlboro, Tinton Falls,
  Holmdel, Red Bank, Jamesburg, Cranbury, Farmingdale, East Freehold,
  Robertsville, Clearbrook Park, Yorketown, Elberon, Whittingham,
  Collingwood Park, Lincroft, Morganville and Princeton Meadows.

Rainfall amounts of up to two inches are possible in the warned area 
in a very short period of time which will cause flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4023 7399 4016 7402 4016 7405 4034 7457
      4039 7428 4034 7401 4032 7404 4032 7403
      4033 7401 4033 7397

$$

SFJ

2 follow-up statements

787 
WGUS71 KPHI 181920
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
320 PM EDT Tue Jun 18 2019

NJC023-025-182230-
/O.CON.KPHI.FF.W.0018.000000T0000Z-190618T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-Middlesex NJ-
320 PM EDT Tue Jun 18 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR
EAST CENTRAL MONMOUTH AND SOUTHERN MIDDLESEX COUNTIES...

At 319 PM EDT, Doppler radar indicated the thunderstorm producing 
the heaviest rain had left the warned area. However, any additional 
rain will exacerbate flooding that may already be occuring. Up to 
two inches of rain have already fallen.

Some locations that could experience flooding include...
Long Branch, Asbury Park, Old Bridge, Marlboro, Tinton Falls,
Holmdel, Red Bank, Jamesburg, Cranbury, Farmingdale, East Freehold,
Robertsville, Clearbrook Park, Yorketown, Elberon, Whittingham,
Collingwood Park, Lincroft, Morganville and Princeton Meadows.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4023 7399 4016 7402 4016 7405 4034 7457
      4039 7428 4034 7401 4032 7404 4032 7403
      4033 7401 4033 7397

$$

SFJ

690 
WGUS71 KPHI 182141
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
541 PM EDT Tue Jun 18 2019

NJC023-025-182150-
/O.CAN.KPHI.FF.W.0018.000000T0000Z-190618T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-Middlesex NJ-
541 PM EDT Tue Jun 18 2019

...THE FLASH FLOOD WARNING FOR EAST CENTRAL MONMOUTH AND SOUTHERN
MIDDLESEX COUNTIES IS CANCELLED...

The heaviest rain has ended. Although minor street flooding remains 
possible, the threat for more significant flooding has diminished. A 
flood advisory remains in effect. Please continue to heed any 
remaining road closures.

LAT...LON 4023 7399 4016 7402 4016 7405 4034 7457
      4039 7428 4034 7401 4032 7404 4032 7403
      4033 7401 4033 7397

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 10:28 PM EDT	Special Marine Warning	PHI		32 min
Jun 18, 11:07 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jun 18, 12:38 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	7 hr
Jun 18, 1:51 PM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Somerset	4 hr
Jun 18, 2:06 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Somerset	54 min
Jun 18, 2:11 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Ocean	4 hr
Jun 18, 2:35 PM EDT	Special Marine Warning	PHI		70 min
Jun 18, 3:26 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Somerset	4 hr
Jun 18, 3:41 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jun 18, 3:57 PM EDT	Flash Flood Warning	PHI	Hunterdon, Warren	4 hr
Jun 18, 4:25 PM EDT	Special Weather Statement	PHI	Mercer	35 min
Jun 18, 5:00 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Monmouth, Ocean	67 min
Jun 18, 6:39 PM EDT	Areal Flood Warning	PHI	Hunterdon, Somerset	4 hr
Jun 18, 7:24 PM EDT	Areal Flood Warning	PHI	Hunterdon, Mercer, Somerset	4 hr

Nearby

Flash Flood Warnings in New Jersey, 2019 Every 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.