Alert archive / New Jersey / Areal Flood Warnings in 2021

Areal Flood Warning 30, NWS Philadelphia/Mount Holly

August 23, 2021Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Aug 23, 2021, 2:26 PM EDT for Sussex County, New Jersey. It was in force for 14 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
Aug 23, 2021, 2:26 PM EDT (18:26 UTC)
Expired
Aug 24, 2021, 4:30 AM EDT
In force
14 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 18:26 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

Brookhaven, NY (KOKX), launched 12:00Z, 6.4 hours before the alert went out and 161 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 12:00Z on 2021-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 150 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 12:00Z on 2021-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.193958Sfc1 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
150 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
711 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

937 
WGUS41 KPHI 231826
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
226 PM EDT Mon Aug 23 2021

NJC037-232230-
/O.NEW.KPHI.FA.W.0030.210823T1826Z-210823T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
226 PM EDT Mon Aug 23 2021

The National Weather Service in Mount Holly has issued a

* Flood Warning for...
  South Central Sussex County in northwestern New Jersey...

* Until 630 PM EDT.

* At 226 PM EDT, gauge reports indicated water was elevated on the 
  Pequest River. Flooding is ongoing or expected to begin shortly in 
  the warned area.

* For Pequest River at Huntsville:
  At 2:15pm the stage was 4.06 feet.
  Flood Stage is 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4101 7477 4099 7474 4094 7480 4096 7482

$$

Kruzdlo
6 follow-up statements
993 
WGUS41 KPHI 232200
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
600 PM EDT Mon Aug 23 2021

NJC037-240030-
/O.EXT.KPHI.FA.W.0030.000000T0000Z-210824T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
600 PM EDT Mon Aug 23 2021

The National Weather Service in Mount Holly has extended the

* Flood Warning for...
  South Central Sussex County in northwestern New Jersey...

* Until 830 PM EDT.

* At 600 PM EDT, gauge reports indicated ongoing flooding on the 
  Pequest River at Huntsville.

* For Pequest River at Huntsville:
  At 5:15pm the stage was 4.19 feet.
  Flood Stage is 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4101 7477 4099 7474 4094 7480 4096 7482

$$

Deal
761 
WGUS41 KPHI 240020
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
820 PM EDT Mon Aug 23 2021

NJC037-240230-
/O.EXT.KPHI.FA.W.0030.000000T0000Z-210824T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
820 PM EDT Mon Aug 23 2021

The National Weather Service in Mount Holly has extended the

* Flood Warning for...
  South Central Sussex County in northwestern New Jersey...

* Until 1030 PM EDT.

* At 820 PM EDT, gauge reports indicated water was elevated on the 
  Pequest River. Flooding is ongoing in the warned area.


* For Pequest River at Huntsville:
  At 8:00pm the stage was 4.23 feet.
  Flood Stage is 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4101 7477 4099 7474 4094 7480 4096 7482

$$

Deal
425 
WGUS41 KPHI 240158
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
958 PM EDT Mon Aug 23 2021

NJC037-240430-
/O.EXT.KPHI.FA.W.0030.000000T0000Z-210824T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
958 PM EDT Mon Aug 23 2021

The National Weather Service in Mount Holly has extended the

* Flood Warning for...
  South Central Sussex County in northwestern New Jersey...

* Until 1230 AM EDT.

* At 958 PM EDT, gauge reports indicated water was elevated on the 
  Pequest River. Flooding is ongoing in the warned area.


* For Pequest River at Huntsville:
  At 9:45pm the stage was 4.23 feet.
  Flood Stage is 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4101 7477 4099 7474 4094 7480 4096 7482

$$

Deal
127 
WGUS41 KPHI 240418
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
1218 AM EDT Tue Aug 24 2021

NJC037-240630-
/O.EXT.KPHI.FA.W.0030.000000T0000Z-210824T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
1218 AM EDT Tue Aug 24 2021

The National Weather Service in Mount Holly has extended the

* Flood Warning for...
  South Central Sussex County in northwestern New Jersey...

* Until 230 AM EDT.

* At 1218 AM EDT, Water levels remain elevated on the Pequest River, 
  and minor flooding is likely occurring... therefore the warning 
  has been extended.


* For Pequest River at Huntsville:
  At 12:00am the stage was 4.18 feet.
  Flood Stage is 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4101 7477 4099 7474 4094 7480 4096 7482

$$

NC
347 
WGUS41 KPHI 240612
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
212 AM EDT Tue Aug 24 2021

NJC037-240830-
/O.EXT.KPHI.FA.W.0030.000000T0000Z-210824T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
212 AM EDT Tue Aug 24 2021

The National Weather Service in Mount Holly has extended the

* Flood Warning for...
  South Central Sussex County in northwestern New Jersey...

* Until 430 AM EDT.

* At 212 AM EDT, Water levels remain elevated on the Pequest River, 
  and minor flooding is likely occurring... therefore the warning 
  has been extended.


* For Pequest River at Huntsville:
  At 1:45am the stage was 4.14 feet.
  Flood Stage is 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4101 7477 4099 7474 4094 7480 4096 7482

$$

NC
599 
WGUS81 KPHI 240824
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
424 AM EDT Tue Aug 24 2021

NJC037-240834-
/O.EXP.KPHI.FA.W.0030.000000T0000Z-210824T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-
424 AM EDT Tue Aug 24 2021

...FLOOD WARNING WILL EXPIRE AT 430 AM EDT EARLY THIS MORNING FOR 
SOUTH CENTRAL SUSSEX COUNTY...

Flood waters have receded. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4101 7477 4099 7474 4094 7480 4096 7482

$$

NC

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 8:11 PM EDTAreal Flood AdvisoryPHIWarren6 hr
Aug 22, 8:47 PM EDTFlash Flood WarningPHISussex, Warren6 hr
Aug 22, 11:27 PM EDTAreal Flood WarningPHIMiddlesex29 hr
Aug 23, 2:09 AM EDTRiver Flood WarningPHIMorris, Passaic17 hr
Aug 23, 3:25 AM EDTAreal Flood WarningPHIMorris8 hr
Aug 23, 4:10 AM EDTRiver Flood WarningPHIMorris41 hr
Aug 23, 5:07 AM EDTAreal Flood WarningPHIWarren21 hr
Aug 23, 5:22 AM EDTAreal Flood WarningPHISomerset9 hr
Aug 23, 5:44 AM EDTAreal Flood WarningPHIHunterdon7 hr
Aug 23, 7:20 AM EDTRiver Flood WarningPHIHunterdon, Somerset7 hr
Aug 23, 7:47 AM EDTRiver Flood WarningPHIMorris, Passaic13 hr
Aug 23, 8:36 AM EDTAreal Flood WarningPHISomerset9 hr
Aug 23, 8:42 AM EDTRiver Flood WarningPHIMiddlesex, Somerset21 hr
Aug 23, 11:22 AM EDTRiver Flood WarningPHIMiddlesex, Somerset16 hr
Aug 23, 11:32 AM EDTRiver Flood WarningPHIEssex, Morris, Passaic5 days
Aug 23, 11:58 AM EDTRiver Flood WarningPHISomerset15 hr
Aug 23, 12:19 PM EDTRiver Flood WarningPHIBurlington33 hr
Aug 23, 12:51 PM EDTCoastal Flood StatementPHIOcean3 hr
Aug 23, 2:26 PM EDTSpecial Weather StatementPHIOcean49 min
Aug 23, 3:12 PM EDTSpecial Weather StatementPHIOcean33 min
Aug 23, 3:15 PM EDTSevere Thunderstorm WarningPHIOcean45 min
Aug 23, 3:18 PM EDTSpecial Marine WarningPHI57 min
Aug 23, 3:38 PM EDTRiver Flood WarningPHIEssex, Morris, Passaic48 hr
Aug 23, 4:47 PM EDTSpecial Weather StatementPHIAtlantic28 min
Aug 23, 4:50 PM EDTSpecial Marine WarningPHI55 min
Aug 23, 5:13 PM EDTSpecial Weather StatementPHICamden32 min
Aug 23, 5:39 PM EDTSpecial Marine WarningPHI33 min
Aug 23, 6:46 PM EDTSpecial Marine WarningPHI64 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.