Alert archive / New Jersey / Flash Flood Warnings in 2023

Flash Flood Warning 61, NWS Philadelphia/Mount Holly

July 16, 2023Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 16, 2023, 5:13 AM EDT for Sussex County, Warren County, New Jersey. It was in force for 4 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
Jul 16, 2023, 5:13 AM EDT (09:13 UTC)
Expired
Jul 16, 2023, 9:09 AM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 143 km from the middle of the area, began a volume at 09:17 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
Jul 16, 7:00 AM EDTRAIN 3.65Wantage Twp, NJ3.65 inch rain report since midnight.

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, 9.2 hours before the alert went out and 164 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 2023-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1061 joules per kilogram.LCLEL10008507005003002001001 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 2023-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 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
1061 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
624 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

867 
WGUS51 KPHI 160913
FFWPHI
NJC037-041-161315-
/O.NEW.KPHI.FF.W.0061.230716T0913Z-230716T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
513 AM EDT Sun Jul 16 2023

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Sussex County in northwestern New Jersey...
  Northeastern Warren County in northwestern New Jersey...

* Until 915 AM EDT.

* At 513 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. The expected rainfall rate is 1 to 1.5 inches in 1 
  hour. Additional rainfall amounts of 1 to 2 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           drainage and low lying areas.

* Some locations that may experience flash flooding include...
  Newton, Montague, Franklin, Hamburg, Ogdensburg, Sussex, 
  Branchville, Andover, Pellettown, Hainesville, Crandon Lakes, and 
  High Point.

This includes the following highways...
	Interstate 80 in New Jersey between mile markers 15 and 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4118 7489 4128 7484 4135 7475 4136 7469
      4121 7439 4090 7492

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 1 HOUR

$$

SFJ
2 follow-up statements
345 
WGUS71 KPHI 161010
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
610 AM EDT Sun Jul 16 2023

NJC037-041-161315-
/O.CON.KPHI.FF.W.0061.000000T0000Z-230716T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-Warren NJ-
610 AM EDT Sun Jul 16 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 AM EDT THIS 
MORNING FOR SUSSEX AND NORTHEASTERN WARREN COUNTIES...

At 610 AM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 2 and 3 inches of rain have 
fallen. The expected rainfall rate is 0.5 to 1 inch in 1 hour. 
Additional rainfall amounts of 0.5 to 1 inch are possible in the 
warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets, and underpasses as well as other
         drainage and low lying areas.

Some locations that may experience flash flooding include...
  Newton, Montague, Franklin, Hamburg, Ogdensburg, Sussex, 
  Branchville, Andover, Pellettown, Hainesville, Crandon Lakes, and 
  High Point.

This includes the following highways...
	Interstate 80 in New Jersey between mile markers 15 and 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4118 7489 4128 7484 4135 7475 4136 7469
      4121 7439 4090 7492

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR

$$

SFJ
968 
WGUS71 KPHI 161309
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
909 AM EDT Sun Jul 16 2023

NJC037-041-161319-
/O.CAN.KPHI.FF.W.0061.000000T0000Z-230716T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-Warren NJ-
909 AM EDT Sun Jul 16 2023

...FLASH FLOOD WARNING IS CANCELLED FOR SUSSEX AND NORTHEASTERN 
WARREN COUNTIES...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat.

A Flood Watch remains in effect until 1200 AM EDT Monday for 
portions of northern Delaware...New Jersey...and Pennsylvania.

LAT...LON 4118 7489 4128 7484 4135 7475 4136 7469
      4121 7439 4090 7492

$$

MJL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 2:22 AM EDTSpecial Marine WarningPHI53 min
Jul 16, 2:47 AM EDTSpecial Weather StatementPHIGloucester, Salem28 min
Jul 16, 3:08 AM EDTSpecial Marine WarningPHI42 min
Jul 16, 3:40 AM EDTFlash Flood WarningPHISussex, Warren7 hr
Jul 16, 4:05 AM EDTFlash Flood WarningPHIHunterdon, Warren6 hr
Jul 16, 4:14 AM EDTSpecial Weather StatementPHIHunterdon31 min
Jul 16, 4:38 AM EDTTornado WarningPHIHunterdon, Somerset37 min
Jul 16, 4:50 AM EDTSpecial Weather StatementPHIBurlington, Ocean25 min
Jul 16, 5:07 AM EDTTornado WarningPHIHunterdon, Morris, Somerset38 min
Jul 16, 5:16 AM EDTSpecial Weather StatementPHIOcean29 min
Jul 16, 5:26 AM EDTFlash Flood WarningPHIHunterdon, Morris, Sussex, Warren4 hr
Jul 16, 5:31 AM EDTTornado WarningPHIMorris, Somerset, Sussex29 min
Jul 16, 5:44 AM EDTSpecial Marine WarningPHI61 min
Jul 16, 5:45 AM EDTSpecial Weather StatementPHIMonmouth30 min
Jul 16, 5:58 AM EDTTornado WarningPHIMorris32 min
Jul 16, 7:52 AM EDTSpecial Marine WarningPHI53 min
Jul 16, 8:40 AM EDTSpecial Marine WarningPHI47 min
Jul 16, 10:54 AM EDTAreal Flood WarningPHIWarren5 hr
Jul 16, 11:08 AM EDTFlash Flood WarningPHIGloucester, Salem3 hr
Jul 16, 11:36 AM EDTFlash Flood WarningPHIMiddlesex, Somerset3 hr
Jul 16, 12:22 PM EDTAreal Flood AdvisoryPHIMercer3 hr
Jul 16, 12:26 PM EDTAreal Flood AdvisoryPHIBurlington, Camden3 hr
Jul 16, 1:47 PM EDTAreal Flood AdvisoryPHIGloucester, Salem80 min
Jul 16, 1:50 PM EDTSpecial Marine WarningPHI85 min
Jul 16, 2:20 PM EDTAreal Flood AdvisoryPHIMiddlesex, Somerset72 min
Jul 16, 2:42 PM EDTSpecial Weather StatementPHICape May48 min
Jul 16, 3:09 PM EDTSpecial Marine WarningPHI51 min
Jul 16, 6:17 PM EDTAreal Flood WarningPHIWarren10 hr
Jul 16, 6:19 PM EDTAreal Flood WarningPHIWarren10 hr

Nearby

Flash Flood Warnings in New Jersey, 2023Every flash flood warning in 2023

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.