Alert archive / New Jersey / Areal Flood Warnings in 2021

Areal Flood Warning 38, NWS Philadelphia/Mount Holly

September 2, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 2, 2021, 1:38 AM EDT for 5 counties in New Jersey. It was in force for 4 hr. 2 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
Sep 2, 2021, 1:38 AM EDT (05:38 UTC)
Expired
Sep 2, 2021, 5:45 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, Middlesex County, NJ, Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 42 km from the middle of the area, began a volume at 05:40 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
Sep 2, 2:00 AM EDTFLASH FLOOD2 Ene North Princeton, NJKINGSTON ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT.
Sep 2, 5:07 AM EDTCOASTAL FLOOD1 N Deal, NJSTATE HIGHWAY 71 CLOSED FROM TIDAL AND FRESHWATER FLOODING BETWEEN BRIGHTON AVENUE AND ROOSEVELT AVENUE. TIME BASED ON DISPATCH REPORT.

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, 5.6 hours before the alert went out and 139 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 2021-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 123 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 00:00Z on 2021-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 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
123 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
512 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
456 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted.

715 
WGUS41 KPHI 020538
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
138 AM EDT Thu Sep 2 2021

NJC005-021-023-025-029-020945-
/O.NEW.KPHI.FA.W.0038.210902T0538Z-210902T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-Middlesex NJ-Monmouth NJ-Ocean NJ-
138 AM EDT Thu Sep 2 2021

The National Weather Service in Mount Holly has issued a

* Flood Warning for...
  Eastern Mercer County in central New Jersey...
  Monmouth County in central New Jersey...
  Southeastern Middlesex County in northern New Jersey...
  Northeastern Burlington County in southern New Jersey...
  Northern Ocean County in southern New Jersey...

* Until 545 AM EDT.

* At 138 AM EDT, local law enforcement reported flooding in the 
  warned area.  Several roads remain closed in northern Monmouth 
  County, especially in Keyport, Middletown, and Hazlet Township. 
  Between 1 and 4 inches of rain have fallen. Flooding will likely 
  continue for a few more hours.

* Some locations that may experience flooding include...
  Long Branch, Asbury Park, Sandy Hook, Lakewood, Middletown, Old 
  Bridge, Jackson, Howell, East Brunswick, South Brunswick, 
  Marlboro, and Manalapan.

This includes the following highways...
	New Jersey Turnpike between exits 7 and 9.
	Interstate 295 in New Jersey between mile markers 53 and 59...and
	near mile marker 63.
	Interstate 195 in New Jersey between mile markers 1 and 34.
	Garden State Parkway between mile markers 97 and 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4015 7472 4016 7472 4039 7463 4038 7462
      4040 7459 4040 7428 4046 7425 4044 7421
      4046 7414 4042 7406 4040 7398 4048 7401
      4042 7396 4022 7396 4003 7433 4008 7476

$$

CMS
1 follow-up statement
647 
WGUS81 KPHI 020941
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
541 AM EDT Thu Sep 2 2021

NJC005-021-023-025-029-020951-
/O.EXP.KPHI.FA.W.0038.000000T0000Z-210902T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-Middlesex NJ-Monmouth NJ-Ocean NJ-
541 AM EDT Thu Sep 2 2021

...FLOOD WARNING WILL EXPIRE AT 545 AM EDT EARLY THIS MORNING FOR 
EASTERN MERCER, MONMOUTH, SOUTHEASTERN MIDDLESEX, NORTHEASTERN 
BURLINGTON, AND NORTHERN OCEAN COUNTIES...

The heavy rain has ended. The flood warning will be allowed o expire.

LAT...LON 4015 7472 4016 7472 4039 7463 4038 7462
      4040 7459 4040 7428 4046 7425 4044 7421
      4046 7414 4042 7406 4040 7398 4048 7401
      4042 7396 4022 7396 4003 7433 4008 7476

$$

Kruzdlo

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 8:02 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatPHIMiddlesex, Morris, Somerset5 hr
Sep 1, 9:01 PM EDTFlash Flood WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean5 hr
Sep 1, 9:43 PM EDTRiver Flood WarningPHIMercer33 hr
Sep 1, 10:05 PM EDTFlash Flood Warning Considerable damage threatPHIMorris, Somerset4 hr
Sep 1, 10:23 PM EDTCoastal Flood StatementPHIOcean13 hr
Sep 1, 10:24 PM EDTFlash Flood WarningPHIBurlington, Camden, Gloucester4 hr
Sep 1, 10:29 PM EDTRiver Flood WarningPHIHunterdon, Mercer49 hr
Sep 1, 10:32 PM EDTRiver Flood WarningPHIMercer31 hr
Sep 1, 10:35 PM EDTRiver Flood WarningPHIBergen, Morris, Passaic30 hr
Sep 1, 10:37 PM EDTRiver Flood WarningPHIMorris, Passaic41 hr
Sep 1, 10:38 PM EDTRiver Flood WarningPHIMorris, Somerset21 days
Sep 1, 10:47 PM EDTAreal Flood WarningPHIWarren23 hr
Sep 1, 10:52 PM EDTAreal Flood WarningPHIHunterdon, Warren12 hr
Sep 2, 12:01 AM EDTAreal Flood WarningPHIHunterdon, Morris, Sussex, Warren40 hr
Sep 2, 12:28 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Gloucester3 hr
Sep 2, 12:31 AM EDTAreal Flood AdvisoryPHIMonmouth, Ocean2 hr
Sep 2, 1:52 AM EDTAreal Flood WarningPHIMorris, Somerset13 hr
Sep 2, 2:23 AM EDTAreal Flood WarningPHIBurlington, Camden, Gloucester, Salem9 hr
Sep 2, 2:29 AM EDTAreal Flood WarningPHIBurlington, Camden, Gloucester5 hr
Sep 2, 3:52 AM EDTAreal Flood WarningPHIHunterdon, Mercer, Morris, Somerset, Warren8 hr
Sep 2, 3:53 AM EDTAreal Flood WarningPHIHunterdon, Mercer, Middlesex, Morris, Somerset8 hr
Sep 2, 4:00 AM EDTRiver Flood WarningPHIMorris48 hr
Sep 2, 4:45 AM EDTRiver Flood WarningPHIHunterdon, Mercer37 hr
Sep 2, 4:45 AM EDTRiver Flood WarningPHIHunterdon, Warren37 hr
Sep 2, 4:45 AM EDTRiver Flood WarningPHIHunterdon37 hr
Sep 2, 4:45 AM EDTRiver Flood WarningPHIHunterdon33 hr
Sep 2, 4:45 AM EDTRiver Flood WarningPHIHunterdon, Mercer34 hr
Sep 2, 4:45 AM EDTRiver Flood WarningPHISussex, Warren5 hr
Sep 2, 6:05 AM EDTCoastal Flood WarningPHIBurlington, Camden, Gloucester, Mercer6 hr
Sep 2, 1:20 PM EDTAreal Flood WarningPHIMiddlesex21 hr
Sep 2, 6:44 PM EDTCoastal Flood AdvisoryPHIBurlington, Camden, Gloucester7 hr

Nearby

Areal Flood Warnings in New Jersey, 2021Every areal flood warning in 2021

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.