Alert archive / New Jersey / Areal Flood Warnings in 2021

Areal Flood Warning 45, NWS Philadelphia/Mount Holly

September 2, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 2, 2021, 3:53 AM EDT for 5 counties in New Jersey. It was in force for 8 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
Sep 2, 2021, 3:53 AM EDT (07:53 UTC)
Expired
Sep 2, 2021, 12:19 PM EDT
In force
8 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 57 km from the middle of the area, began a volume at 07:54 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
Sep 2, 4:00 AM EDTFLOOD2 Ene Somerset, NJEASTON AVE UNDER A FEW FEET OF WATER WITH ABANDONED AND FLOODED VEHICLES.

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, 7.9 hours before the alert went out and 142 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.

617 
WGUS41 KPHI 020753
FLWPHI

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

NJC019-021-023-027-035-021700-
/O.NEW.KPHI.FA.W.0045.210902T0753Z-210902T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Middlesex NJ-Morris NJ-Somerset NJ-
353 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...
  Middlesex County in northern New Jersey...
  Southeastern Morris County in northern New Jersey...
  Somerset County in northern New Jersey...
  East Central Hunterdon County in northwestern New Jersey...

* Until 100 PM EDT Thursday.

* At 353 AM EDT, local law enforcement reported widespread flooding 
  continuing across the warning area. Many roads are closed, and 
  several rivers and streams are in flood. Flooding will continue 
  for several more hours. Please heed road closures!

* Some locations that may experience flooding include...
  New Brunswick, Perth Amboy, Somerville, Somerset, Edison, Old 
  Bridge, East Brunswick, Bridgewater, South Brunswick, Sayreville, 
  North Brunswick, and Carteret.

This includes the following highways...
	New Jersey Turnpike between exits 8 and 13.
	Interstate 78 in New Jersey between mile markers 26 and 42.
	Interstate 295 in New Jersey between mile markers 61 and 68.
	Interstate 195 in New Jersey between mile markers 1 and 8.
	Interstate 287 in New Jersey between mile markers 0 and 30.
	Garden State Parkway between mile markers 121 and 134.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4074 7474 4074 7437 4067 7446 4066 7445
      4066 7440 4060 7446 4060 7422 4056 7422
      4050 7426 4049 7429 4045 7422 4041 7425
      4028 7440 4025 7449 4019 7456 4018 7461
      4014 7459 4018 7470 4015 7472

$$

CMS
1 follow-up statement
614 
WGUS81 KPHI 021619
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
1219 PM EDT Thu Sep 2 2021

NJC019-021-023-027-035-021629-
/O.CAN.KPHI.FA.W.0045.000000T0000Z-210902T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Middlesex NJ-Morris NJ-Somerset NJ-
1219 PM EDT Thu Sep 2 2021

...FLOOD WARNING IS CANCELLED FOR EASTERN MERCER, MIDDLESEX, 
SOUTHEASTERN MORRIS, SOMERSET, AND EAST CENTRAL HUNTERDON COUNTIES...

This flood warning has been cancelled. Additional flood warnings 
remain in place across the region.

LAT...LON 4074 7474 4074 7437 4067 7446 4066 7445
      4066 7440 4060 7446 4060 7422 4056 7422
      4050 7426 4049 7429 4045 7422 4041 7425
      4028 7440 4025 7449 4019 7456 4018 7461
      4014 7459 4018 7470 4015 7472

$$

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, 1:38 AM EDTAreal Flood WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean4 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, 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.