Alert archive / New Jersey / Flash Flood Warnings in 2024
Flash Flood Warning 59, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 18, 2024, 4:41 AM EDT for Burlington County, Camden County, Mercer County, New Jersey. It was in force for 2 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 18, 2024, 4:41 AM EDT (08:41 UTC)
- Expired
- Aug 18, 2024, 6:57 AM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Camden County, NJ, Mercer County, NJ
The radar
The Philadelphia radar (KDIX), 28 km from the middle of the area, began a volume at 08:41 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 00:00Z, 8.7 hours before the alert went out and 172 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 735 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
930
WGUS51 KPHI 180841
FFWPHI
NJC005-007-021-181245-
/O.NEW.KPHI.FF.W.0059.240818T0841Z-240818T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
441 AM EDT Sun Aug 18 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southeastern Mercer County in central New Jersey...
Northwestern Burlington County in southern New Jersey...
Central Camden County in southern New Jersey...
* Until 845 AM EDT.
* At 441 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. The expected rainfall rate is 1 to 2 inches 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...
Evesham, Voorhees, Medford, Lindenwold, Lumberton, Mount Holly,
Berlin, Bordentown, Allentown, Jacksonville, Columbus and Jobstown.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 55 and 56.
New Jersey Turnpike between exits 7 and 8.
Interstate 195 in New Jersey between mile markers 5 and 8.
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.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4024 7451 4019 7456 4018 7459 4019 7460
4018 7461 4015 7459 3978 7490 3983 7499
4027 7459
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
RCM2 follow-up statements
650
WGUS71 KPHI 181003
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
603 AM EDT Sun Aug 18 2024
NJC007-181013-
/O.CAN.KPHI.FF.W.0059.000000T0000Z-240818T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-
603 AM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL CAMDEN COUNTY...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flood Watch remains in effect until 200 AM EDT Monday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4000 7476 4003 7481 4027 7459 4024 7451
4022 7454 4019 7456 4018 7459 4019 7460
4018 7461 4015 7459 3997 7474
$$
NJC005-021-181245-
/O.CON.KPHI.FF.W.0059.000000T0000Z-240818T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-
603 AM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 AM EDT THIS
MORNING FOR SOUTHEASTERN MERCER AND NORTH CENTRAL BURLINGTON
COUNTIES...
At 603 AM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 4 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches 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...
Bordentown, Allentown, Crosswicks, Georgetown, Columbus, Jobstown,
Mercerville-Hamilton Square, Jacksonville, Windsor and
Yardville-Groveville.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 55 and 56.
New Jersey Turnpike between exits 7 and 8.
Interstate 195 in New Jersey between mile markers 5 and 8.
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.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4000 7476 4003 7481 4027 7459 4024 7451
4022 7454 4019 7456 4018 7459 4019 7460
4018 7461 4015 7459 3997 7474
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
RCM542
WGUS71 KPHI 181057
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
657 AM EDT Sun Aug 18 2024
NJC005-021-181107-
/O.CAN.KPHI.FF.W.0059.000000T0000Z-240818T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-
657 AM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN MERCER AND
NORTH CENTRAL BURLINGTON COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
A Flood Watch remains in effect until 200 AM EDT Monday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4000 7476 4003 7481 4027 7459 4024 7451
4022 7454 4019 7456 4018 7459 4019 7460
4018 7461 4015 7459 3997 7474
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 3:09 AM EDT | Flash Flood Warning | PHI | Burlington, Camden | 93 min |
| Aug 18, 2:17 PM EDT | Special Marine Warning | PHI | 58 min | |
| Aug 18, 2:42 PM EDT | Special Marine Warning | PHI | 93 min | |
| Aug 18, 3:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 18, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 41 min |
| Aug 18, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 34 min |
| Aug 18, 4:56 PM EDT | Flash Flood Warning | PHI | Warren | 6 hr |
| Aug 18, 5:10 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Warren | 29 min |
| Aug 18, 5:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Aug 18, 5:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 6 hr |
| Aug 18, 5:38 PM EDT | Flash Flood Warning | PHI | Sussex, Warren | 4 hr |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 43 min |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth | 58 min |
| Aug 18, 5:51 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 24 min |
| Aug 18, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 18 min |
| Aug 18, 6:01 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Aug 18, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 66 min |
| Aug 18, 6:36 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.