Alert archive / New Jersey / Flash Flood Warnings in 2018

Flash Flood Warning 45, NWS Philadelphia/Mount Holly

July 27, 2018Cumberland County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 27, 2018, 4:19 PM EDT for Cumberland County, New Jersey. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 27, 2018, 4:19 PM EDT (20:19 UTC)
Expired: Jul 27, 2018, 8:15 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 20:19 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.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.3 hours before the alert went out and 167 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: 1842 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

524 
WGUS51 KPHI 272019
FFWPHI
NJC011-280015-
/O.NEW.KPHI.FF.W.0045.180727T2019Z-180728T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Central Cumberland County in southern New Jersey...

* Until 815 PM EDT.

* At 418 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to two to three inches of 
  rain have already fallen today. Flash flooding is expected to 
  begin shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Vineland, Millville, Bridgeton, Laurel Lake, Greenwich, Shiloh,
  Newport Meadows, Fairton, Cedarville, South Vineland and Rosenhayn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3943 7545 3942 7546 3939 7543 3939 7542
      3946 7541 3946 7537 3947 7536 3947 7510
      3946 7508 3947 7508 3947 7499 3933 7501
      3933 7540 3943 7547

$$

Meola

2 follow-up statements

818 
WGUS71 KPHI 272345
FFSPHI

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

NJC011-280015-
/O.CON.KPHI.FF.W.0045.000000T0000Z-180728T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cumberland NJ-
745 PM EDT FRI JUL 27 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR
CENTRAL CUMBERLAND COUNTY...

At 743 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Up to three inches of rain has fallen 
across the warned area. Even though the heavy rain has ended, flash 
flooding may still occur.

Some locations that could experience flooding include...
Vineland, Millville, Bridgeton, Laurel Lake, Greenwich, Shiloh,
Newport Meadows, Fairton, Cedarville, South Vineland and Rosenhayn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3943 7545 3942 7546 3939 7543 3939 7542
      3946 7541 3946 7537 3947 7536 3947 7510
      3946 7508 3947 7508 3947 7499 3933 7501
      3933 7540 3943 7547

$$

Meola

939 
WGUS71 KPHI 280008
FFSPHI

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

NJC011-280018-
/O.EXP.KPHI.FF.W.0045.000000T0000Z-180728T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cumberland NJ-
808 PM EDT FRI JUL 27 2018

...THE FLASH FLOOD WARNING FOR CENTRAL CUMBERLAND COUNTY WILL EXPIRE
AT 815 PM EDT...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3943 7545 3942 7546 3939 7543 3939 7542
      3946 7541 3946 7537 3947 7536 3947 7510
      3946 7508 3947 7508 3947 7499 3933 7501
      3933 7540 3943 7547

$$

Meola

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 9:29 AM EDT	Special Weather Statement	PHI	Salem	61 min
Jul 27, 9:50 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 7 more	13 hr
Jul 27, 10:08 AM EDT	Special Weather Statement	PHI	Cumberland	67 min
Jul 27, 10:34 AM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	10 hr
Jul 27, 11:11 AM EDT	Special Weather Statement	PHI	Atlantic	64 min
Jul 27, 12:10 PM EDT	Special Weather Statement	PHI	Atlantic	65 min
Jul 27, 12:24 PM EDT	Areal Flood Advisory	PHI	Cape May	114 min
Jul 27, 1:15 PM EDT	Special Weather Statement	PHI	Salem	45 min
Jul 27, 1:23 PM EDT	Special Weather Statement	PHI	Morris	52 min
Jul 27, 1:31 PM EDT	Special Marine Warning	PHI		59 min
Jul 27, 1:38 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	4 hr
Jul 27, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Somerset	41 min
Jul 27, 2:14 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	46 min
Jul 27, 2:19 PM EDT	Special Marine Warning	PHI		56 min
Jul 27, 2:22 PM EDT	Special Marine Warning	PHI		53 min
Jul 27, 2:26 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	6 hr
Jul 27, 2:40 PM EDT	Special Marine Warning	PHI		65 min
Jul 27, 2:59 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	46 min
Jul 27, 3:09 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	6 hr
Jul 27, 3:14 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 3:45 PM EDT	Special Weather Statement	PHI	Cumberland	30 min
Jul 27, 4:12 PM EDT	Special Marine Warning	PHI		63 min
Jul 27, 4:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	42 min
Jul 27, 4:25 PM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	7 hr
Jul 27, 4:32 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	43 min
Jul 27, 4:43 PM EDT	Areal Flood Advisory	PHI	Mercer	5 hr
Jul 27, 4:54 PM EDT	Flash Flood Warning	PHI	Middlesex	4 hr
Jul 27, 5:03 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland	4 hr
Jul 27, 5:23 PM EDT	Special Marine Warning	PHI		67 min
Jul 27, 5:46 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	4 hr
Jul 27, 6:10 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth, Somerset	4 hr
Jul 27, 7:14 PM EDT	Special Marine Warning	PHI		61 min
Jul 27, 7:15 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	4 hr
Jul 27, 7:51 PM EDT	Special Weather Statement	PHI	Atlantic	39 min
Jul 27, 7:55 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Somerset, Warren	108 min

Nearby

Flash Flood Warnings in New Jersey, 2018 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.