Alert archive / New Jersey / Flash Flood Warnings in 2018

Flash Flood Warning 111, NWS Philadelphia/Mount Holly

October 12, 20184 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 12, 2018, 3:17 AM EDT for 4 counties in New Jersey. It was in force for 4 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
Oct 12, 2018, 3:17 AM EDT (07:17 UTC)
Expired
Oct 12, 2018, 7:15 AM 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, Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 31 km from the middle of the area, began a volume at 07:20 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
Oct 12, 4:10 AM EDTFLOODLakewood Twp, NJFLOODING ON US 9 SOUTH OF CR 528/CENTRAL AVE.
Oct 12, 4:14 AM EDTFLOODOcean Twp, NJFLOODING ON NJ 35 SOUTHBOUND NORTH OF CR 40/SUNSET AVE. 1 LANE MAY BE CLOSED.
Oct 12, 4:15 AM EDTFLOOD1 Nw Lakewood, NJFLOODING ON US 9 IN BOTH DIRECTIONS NORTH OF CR 547/8TH ST. 1 LANE MAY CLOSED.
Oct 12, 4:17 AM EDTFLOOD1 Nw Manasquan, NJFLOODING ON NJ 71 IN BOTH DIRECTIONS SOUTH OF MAIN ST. 1 LANE MAY CLOSED.
Oct 12, 4:38 AM EDTFLOODManasquan, NJFLOODING ON NJ 71 SOUTH OF MAIN ST.
Oct 12, 4:39 AM EDTFLOODWall Twp, NJFLOODING ON NJ 34 NORTH OF CR 18/BELMAR BLVD. ALL LANES CLOSED AND DETOURED.
Oct 12, 6:42 AM EDTFLOOD1 Sse Brick Township, NJADAMSTON ROAD CLOSED AT ALLISON PLACE DUE TO FLOODING.

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, 7.3 hours before the alert went out and 145 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 2018-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 2018-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
1 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
670 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
-48 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

034 
WGUS51 KPHI 120717
FFWPHI
NJC005-021-025-029-121115-
/O.NEW.KPHI.FF.W.0111.181012T0717Z-181012T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
317 AM EDT FRI OCT 12 2018

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Northern Ocean County in southern New Jersey...
  Southeastern Mercer County in central New Jersey...
  Northern Burlington County in southern New Jersey...
  Monmouth County in central New Jersey...

* Until 715 AM EDT.

* At 315 AM EDT, Doppler radar indicated heavy rain across portions 
  of the warned area. Up to three inches of rain have already 
  fallen. This amount of rainfall is capable of producing flash 
  flooding. 

* Some locations that could experience flooding include...
  Toms River, Long Branch, Asbury Park, Sandy Hook, Lakewood,
  Middletown, Jackson, Howell, Marlboro, Manalapan, Willingboro,
  Tinton Falls, Holmdel, Red Bank, Florence, Burlington, Bristol,
  Mount Holly, Riverside and Manasquan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4006 7403 3990 7453 4003 7500 4007 7493
      4008 7487 4013 7481 4012 7478 4025 7442
      4040 7422 4045 7412 4040 7399 4041 7398
      4047 7400 4043 7397 4029 7397

$$

Kruzdlo
1 follow-up statement
135 
WGUS71 KPHI 121106
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
706 AM EDT FRI OCT 12 2018

NJC005-021-025-029-121115-
/O.EXP.KPHI.FF.W.0111.000000T0000Z-181012T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ocean NJ-Mercer NJ-Burlington NJ-Monmouth NJ-
706 AM EDT FRI OCT 12 2018

...THE FLASH FLOOD WARNING FOR NORTHERN OCEAN...SOUTHEASTERN
MERCER...NORTHERN BURLINGTON AND MONMOUTH COUNTIES WILL EXPIRE AT 715
AM EDT...

This flash flood warning has been converted to a flood warning. Two 
to four inches of rain fell overnight and it will take some time to 
drain and recede.

LAT...LON 4006 7403 3990 7453 4003 7500 4007 7493
      4008 7487 4013 7481 4012 7478 4025 7442
      4040 7422 4045 7412 4040 7399 4041 7398
      4047 7400 4043 7397 4029 7397

$$

Robertson

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 11, 8:09 PM EDTSpecial Weather StatementPHISalem36 min
Oct 11, 8:27 PM EDTAreal Flood AdvisoryPHICumberland, Gloucester, Salem8 hr
Oct 11, 8:41 PM EDTSpecial Weather StatementPHIGloucester, Salem34 min
Oct 11, 9:10 PM EDTSpecial Weather StatementPHICamden, Gloucester, Salem35 min
Oct 11, 9:43 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester8 hr
Oct 11, 10:45 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more3 hr
Oct 11, 11:54 PM EDTHigh Wind WarningPHICape May9 hr
Oct 12, 12:08 AM EDTFlash Flood WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem4 hr
Oct 12, 12:14 AM EDTStorm WarningPHI9 hr
Oct 12, 12:50 AM EDTAreal Flood AdvisoryPHIBurlington, Mercer, Monmouth, Ocean3 hr
Oct 12, 1:15 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Cumberland, Ocean40 min
Oct 12, 1:52 AM EDTFlash Flood WarningPHIAtlantic, Burlington, Cape May, Cumberland, Ocean4 hr
Oct 12, 2:55 AM EDTAreal Flood AdvisoryPHIGloucester, Hunterdon, Mercer, Middlesex, Somerset, Warren2 hr
Oct 12, 3:46 AM EDTAreal Flood WarningPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Salem7 hr
Oct 12, 5:32 AM EDTAreal Flood WarningPHIAtlantic, Burlington, Cape May, Cumberland, Ocean4 hr
Oct 12, 7:02 AM EDTAreal Flood WarningPHIBurlington, Mercer, Monmouth, Ocean4 hr
Oct 12, 11:42 AM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean4 hr
Oct 12, 11:45 AM EDTSmall Craft AdvisoryPHI12 hr
Oct 12, 3:20 PM EDTRiver Flood WarningPHIBurlington37 hr

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.