Alert archive / New Jersey / Flash Flood Warnings in 2024
Flash Flood Warning 40, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 6, 2024, 7:24 PM EDT for 5 counties in New Jersey. It was in force for 5 hr. 8 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
- Aug 6, 2024, 7:24 PM EDT (23:24 UTC)
- Expired
- Aug 7, 2024, 12:25 AM EDT
- In force
- 5 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), 52 km from the middle of the area, began a volume at 23:27 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 |
|---|---|---|---|
| Aug 6, 7:30 PM EDT | FLASH FLOOD | Yorketown, NJ | Commanck Lane is closed due to flooding. |
| Aug 6, 8:04 PM EDT | FLASH FLOOD | 1 Sw South River, NJ | NJ DOT - STMC: Flooding on NJ 18 both directions CR 535/Cranbury Rd (East Brunswick Twp) All lanes closed northbound. |
| Aug 6, 8:19 PM EDT | FLASH FLOOD | 1 S South Amboy, NJ | NJ DOT - STMC: Flooding on NJ 35 southbound ramp to Pine Av (Sayreville) All lanes closed. |
| Aug 6, 9:45 PM EDT | RAIN 2.04 | 2 Ssw Browntown, NJ | Mesonet station FW8442 Old Bridge. |
| Aug 6, 9:45 PM EDT | RAIN 2.55 | 1 Ene Sayreville, NJ | Mesonet station DW5872 Sayreville. |
| Aug 6, 9:48 PM EDT | RAIN 2.52 | 1 Wnw Matawan, NJ | Mesonet station EW6999 Matawan. |
| Aug 6, 9:50 PM EDT | RAIN 2.39 | 1 Ene Milltown, NJ | Mesonet station ESTBR 1 ENE Milltown. |
| Aug 6, 9:50 PM EDT | RAIN 3.44 | 2 Ese Yorketown, NJ | Mesonet station ENGLS Englishtown (LaFayette Mills). |
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, 11.4 hours before the alert went out and 137 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.
- Mixed-layer CAPE
- 1440 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 797 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.2
The text
As transmitted.
718
WGUS51 KPHI 062324
FFWPHI
NJC005-021-023-025-029-070330-
/O.NEW.KPHI.FF.W.0040.240806T2324Z-240807T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
724 PM EDT Tue Aug 6 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southeastern Mercer County in central New Jersey...
Central Monmouth County in central New Jersey...
Middlesex County in northern New Jersey...
Northeastern Burlington County in southern New Jersey...
Northwestern Ocean County in southern New Jersey...
* Until 1130 PM EDT.
* At 724 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
0.5 and 1.5 inches of rain have fallen. The expected rainfall rate
is 1 to 2 inches in 1 hour. Additional rainfall amounts of 1 to 3
inches are possible in the warned area. Flash flooding is ongoing
or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
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...
Trenton, New Brunswick, Perth Amboy, Edison, Old Bridge, East
Brunswick, South Brunswick, Sayreville, North Brunswick, Marlboro,
Manalapan and Carteret.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 57 and 63.
New Jersey Turnpike between exits 8 and 13.
Interstate 287 in New Jersey between mile markers 0 and 3.
Interstate 195 in New Jersey between mile markers 0 and 18.
Garden State Parkway between mile markers 115 and 134.
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 4025 7452 4036 7459 4060 7434 4061 7431
4059 7429 4060 7422 4059 7420 4056 7422
4055 7425 4050 7426 4049 7427 4046 7426
4045 7421 4044 7421 4031 7411 4007 7455
4014 7473 4016 7472 4022 7477
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
MJL2 follow-up statements
834
WGUS51 KPHI 070307
FFWPHI
NJC005-021-023-025-029-070530-
/O.EXT.KPHI.FF.W.0040.000000T0000Z-240807T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1107 PM EDT Tue Aug 6 2024
The National Weather Service in Mount Holly has extended the
* Flash Flood Warning for...
Southeastern Mercer County in central New Jersey...
Central Monmouth County in central New Jersey...
Middlesex County in northern New Jersey...
Northeastern Burlington County in southern New Jersey...
Northwestern Ocean County in southern New Jersey...
* Until 130 AM EDT.
* At 1107 PM EDT, Doppler radar and automated rain gauges 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 2 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 and automated gauges.
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...
Trenton, New Brunswick, Perth Amboy, Edison, Old Bridge, East
Brunswick, South Brunswick, Sayreville, North Brunswick, Marlboro,
Manalapan and Carteret.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 57 and 63.
New Jersey Turnpike between exits 8 and 13.
Interstate 287 in New Jersey between mile markers 0 and 3.
Interstate 195 in New Jersey between mile markers 0 and 18.
Garden State Parkway between mile markers 116 and 134.
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.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4025 7452 4036 7459 4060 7434 4061 7431
4059 7429 4060 7422 4059 7420 4056 7422
4055 7425 4050 7426 4049 7427 4046 7426
4045 7421 4044 7421 4031 7411 4007 7455
4014 7473 4016 7472 4022 7477
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
MPS694
WGUS71 KPHI 070425 RRA
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1225 AM EDT Wed Aug 7 2024
NJC005-021-023-025-029-070435-
/O.CAN.KPHI.FF.W.0040.000000T0000Z-240807T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-Middlesex NJ-Monmouth NJ-Ocean NJ-
1225 AM EDT Wed Aug 7 2024
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN MERCER, CENTRAL
MONMOUTH, MIDDLESEX, NORTHEASTERN BURLINGTON AND NORTHWESTERN OCEAN
COUNTIES...
The heavy rain has ended. While the flash flood threat has ended,
flooding remains an issue and a new Flood Warning will be issued.
Please continue to heed remaining road closures.
A Flood Watch remains in effect until 1200 PM EDT Wednesday for
portions of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4025 7452 4036 7459 4060 7434 4061 7431
4059 7429 4060 7422 4059 7420 4056 7422
4055 7425 4050 7426 4049 7427 4046 7426
4045 7421 4044 7421 4031 7411 4007 7455
4014 7473 4016 7472 4022 7477
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 9:37 AM EDT | Heat Advisory | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more | 9 hr |
| Aug 6, 9:39 AM EDT | Small Craft Advisory | PHI | 10 hr | |
| Aug 6, 2:04 PM EDT | Special Marine Warning | PHI | 56 min | |
| Aug 6, 2:41 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 19 min |
| Aug 6, 2:55 PM EDT | Special Marine Warning | PHI | 65 min | |
| Aug 6, 3:15 PM EDT | Special Marine Warning | PHI | 60 min | |
| Aug 6, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 27 min |
| Aug 6, 3:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 23 min |
| Aug 6, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth | 37 min |
| Aug 6, 3:45 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth | 2 hr |
| Aug 6, 3:49 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth | 56 min |
| Aug 6, 4:10 PM EDT | Special Marine Warning | PHI | 65 min | |
| Aug 6, 4:13 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Monmouth | 8 hr |
| Aug 6, 4:32 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Somerset | 43 min |
| Aug 6, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 40 min |
| Aug 6, 4:55 PM EDT | Flash Flood Warning | PHI | Monmouth | 6 hr |
| Aug 6, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 49 min |
| Aug 6, 5:06 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 54 min |
| Aug 6, 5:29 PM EDT | Flash Flood Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 6 hr |
| Aug 6, 5:36 PM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 8 hr |
| Aug 6, 6:37 PM EDT | Flash Flood Warning | PHI | Warren | 3 hr |
| Aug 6, 6:39 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 5 hr |
| Aug 6, 6:46 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 4 hr |
| Aug 6, 6:57 PM EDT | Flash Flood Warning | PHI | Warren | 3 hr |
| Aug 6, 7:04 PM EDT | Flash Flood Warning | PHI | Burlington | 5 hr |
Nearby
Flash Flood Warnings in New Jersey, 2024Every flash flood warning in 2024
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.