Alert archive / New Jersey / Flash Flood Warnings in 2025
Flash Flood Warning 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at May 15, 2025, 4:56 PM EDT for Burlington County, Mercer County, Monmouth County, New Jersey; Bucks County, Pennsylvania. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 15, 2025, 4:56 PM EDT (20:56 UTC)
- Expired
- May 15, 2025, 5:40 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Mercer County, NJ, Monmouth County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 42 km from the middle of the area, began a volume at 20:59 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, 8.9 hours before the alert went out and 174 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
- 111 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 507 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
329
WGUS51 KPHI 152056
FFWPHI
NJC005-021-025-PAC017-160100-
/O.NEW.KPHI.FF.W.0005.250515T2056Z-250516T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
Issued by National Weather Service New York NY
456 PM EDT Thu May 15 2025
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southern Mercer County in central New Jersey...
Western Monmouth County in central New Jersey...
North Central Burlington County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
* Until 900 PM EDT.
* At 456 PM EDT, Doppler radar indicated heavy rain across the
warned area. Between 0.5 and 1 inch of rain has 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 heavy rain.
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...
Trenton, Ewing, Bordentown, Pennington, Yardley, Newtown,
Tullytown, Allentown, Langhorne, White Horse, Mercerville-Hamilton
Square and Florence-Roebling.
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.
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 4031 7484 4032 7481 4030 7468 4027 7464
4022 7458 4020 7454 4016 7453 4012 7456
4008 7462 4010 7470 4013 7483 4018 7497
4023 7497 4029 7492 4030 7489
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Hoeflich1 follow-up statement
147
WGUS71 KPHI 152140
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
540 PM EDT Thu May 15 2025
NJC005-021-025-PAC017-152150-
/O.CAN.KPHI.FF.W.0005.000000T0000Z-250516T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-Monmouth NJ-Bucks PA-
540 PM EDT Thu May 15 2025
...FLASH FLOOD WARNING IS CANCELLED FOR MERCER, WESTERN MONMOUTH,
NORTH CENTRAL BURLINGTON AND SOUTHEASTERN BUCKS COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 4018 7497 4023 7497 4029 7492 4030 7488
4025 7484 4022 7477 4019 7475 4016 7472
4018 7470 4014 7462 4014 7459 4018 7461
4019 7457 4021 7455 4020 7454 4016 7453
4012 7456 4008 7462 4013 7483
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 8:16 PM EDT | Dense Fog Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more | 13 hr |
| May 15, 9:34 AM EDT | Coastal Flood Advisory | PHI | Burlington | 46 hr |
Nearby
Flash Flood Warnings in New Jersey, 2025Flash Flood Warnings in Pennsylvania, 2025Every flash flood warning in 2025
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.