Alert archive / New Jersey / Flash Flood Warnings in 2023

Flash Flood Warning 77, NWS Philadelphia/Mount Holly

July 25, 2023Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 25, 2023, 4:12 PM EDT for Monmouth County, New Jersey. It was in force for 3 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: Jul 25, 2023, 4:12 PM EDT (20:12 UTC)
Expired: Jul 25, 2023, 7:01 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 55 km from the middle of the area, began a volume at 20:16 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

Time	Report	Where	Remark
Jul 25, 4:55 PM EDT	FLOOD	3 Ne Farmingdale, NJ	NJ DOT - TOC South: Flooding on NJ 33 both directions East of NJ 34 (Howell Twp) All lanes closed.
Jul 25, 4:59 PM EDT	FLOOD	1 E Monmouth Hills, NJ	Picture of significant street flooding on 5th Street in Highlands.

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 12:00Z, 8.2 hours before the alert went out and 116 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 231 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 960 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

792 
WGUS51 KPHI 252012
FFWPHI
NJC025-260015-
/O.NEW.KPHI.FF.W.0077.230725T2012Z-230726T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
412 PM EDT Tue Jul 25 2023

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Eastern Monmouth County in central New Jersey...

* Until 815 PM EDT.

* At 412 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 3 inches of 
  rain have fallen. 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...
  Long Branch, Middletown, Howell, Tinton Falls, Holmdel, Red Bank, 
  Highlands, Farmingdale, Lincroft, Collingwood Park, Navesink, and 
  East Freehold.

This includes the following highways...
	Interstate 195 in New Jersey between mile markers 27 and 29.
	Garden State Parkway between mile markers 103 and 115.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4042 7404 4041 7400 4040 7398 4041 7398
      4040 7397 4031 7397 4015 7422 4017 7425
      4037 7420 4045 7412 4043 7408 4043 7407
      4042 7406

FLASH FLOOD...RADAR INDICATED

$$

RCM

2 follow-up statements

587 
WGUS71 KPHI 252029
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
429 PM EDT Tue Jul 25 2023

NJC025-260015-
/O.CON.KPHI.FF.W.0077.000000T0000Z-230726T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-
429 PM EDT Tue Jul 25 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT THIS 
EVENING FOR EASTERN MONMOUTH COUNTY...

At 429 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1.5 and 3 inches of rain have 
fallen. Additional rainfall amounts of 1 to 2 inches are possible in 
the warned area. Flash flooding is ongoing or expected to begin 
shortly.

HAZARD...Life threatening flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets, and underpasses.

Some locations that may experience flash flooding include...
  Long Branch, Middletown, Howell, Tinton Falls, Holmdel, Red Bank, 
  Highlands, Farmingdale, Lincroft, Collingwood Park, Navesink, and 
  East Freehold.

This includes the following highways...
	Interstate 195 in New Jersey between mile markers 27 and 29.
	Garden State Parkway between mile markers 103 and 115.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4042 7404 4041 7400 4040 7398 4041 7398
      4040 7397 4031 7397 4015 7422 4017 7425
      4037 7420 4045 7412 4043 7408 4043 7407
      4042 7406

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

RCM

479 
WGUS71 KPHI 252301
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
701 PM EDT Tue Jul 25 2023

NJC025-252311-
/O.CAN.KPHI.FF.W.0077.000000T0000Z-230726T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-
701 PM EDT Tue Jul 25 2023

...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN MONMOUTH COUNTY...

The heavy rain has ended and flood waters are receding. While there 
will remain ponding on some roadways and local
creeks and streams will continue to run high, flooding is no longer 
expected to pose a threat.

LAT...LON 4040 7398 4041 7398 4040 7397 4031 7397
      4015 7422 4017 7425 4037 7420 4045 7412
      4043 7408 4043 7407 4042 7406 4042 7404
      4042 7403 4041 7400

$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 1:06 PM EDT	Severe Thunderstorm Warning	PHI	Warren	39 min
Jul 25, 1:21 PM EDT	Special Weather Statement	PHI	Hunterdon	24 min
Jul 25, 1:27 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset	48 min
Jul 25, 1:38 PM EDT	Flash Flood Warning	PHI	Gloucester	4 hr
Jul 25, 1:52 PM EDT	Special Marine Warning	PHI		38 min
Jul 25, 2:06 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	39 min
Jul 25, 2:08 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset	52 min
Jul 25, 2:20 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	55 min
Jul 25, 2:39 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset, Sussex	51 min
Jul 25, 2:44 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset	2 hr
Jul 25, 2:45 PM EDT	Special Marine Warning	PHI		60 min
Jul 25, 2:53 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Somerset	52 min
Jul 25, 3:16 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer	44 min
Jul 25, 3:24 PM EDT	Special Marine Warning	PHI		96 min
Jul 25, 3:27 PM EDT	Areal Flood Advisory	PHI	Middlesex, Somerset	81 min
Jul 25, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	50 min
Jul 25, 3:45 PM EDT	Special Marine Warning	PHI		60 min
Jul 25, 3:52 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	53 min
Jul 25, 3:57 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	3 hr
Jul 25, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	30 min
Jul 25, 4:17 PM EDT	Special Marine Warning	PHI		58 min
Jul 25, 4:50 PM EDT	Special Marine Warning	PHI		55 min
Jul 25, 4:57 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	2 hr
Jul 25, 5:09 PM EDT	Special Marine Warning	PHI		66 min

Nearby

Flash Flood Warnings in New Jersey, 2023 Every 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.