Alert archive / New Jersey / Flash Flood Warnings in 2026
Flash Flood Warning 98, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 5, 2026, 1:23 PM EDT for Bucks County, Pennsylvania; Burlington County, Mercer County, New Jersey. It was in force for 4 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
- Aug 5, 2026, 1:23 PM EDT (17:23 UTC)
- Expired
- Aug 5, 2026, 5:30 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Mercer County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 31 km from the middle of the area, began a volume at 17:25 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 5, 2:05 PM EDT | FLASH FLOOD | Bordentown Twp, NJ | Route 130 flooded just north the I-295 interchange. |
| Aug 5, 2:35 PM EDT | FLASH FLOOD | 1 Wnw Fairless Hills, PA | Oxford Valley Road flooded just south of Lincoln Highway. |
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, 5.4 hours before the alert went out and 176 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
- 1372 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
075
WGUS51 KPHI 051723
FFWPHI
NJC005-021-PAC017-052130-
/O.NEW.KPHI.FF.W.0098.260805T1723Z-260805T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
123 PM EDT Wed Aug 5 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
South Central Mercer County in central New Jersey...
Northeastern Burlington County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
* Until 530 PM EDT.
* At 123 PM EDT, Doppler radar indicated heavy rain moving into the
warned area. Up to 0.5 inches of rain have fallen. The expected
rainfall rate is 0.5 to 1 inch in 30 minutes. Additional rainfall
amounts up to 2 inches 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, Florence, Burlington, Bristol, Bordentown,
Yardley, Tullytown, Langhorne, Pemberton, Wrightstown and Columbus.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 48 and 66.
New Jersey Turnpike between exits 6 and 7A.
Interstate 195 in New Jersey between mile markers 0 and 5.
Pennsylvania Turnpike between mile markers 356 and 359.
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 4023 7484 4027 7467 4025 7466 4000 7451
3999 7451 3998 7450 3993 7472 4006 7484
4019 7493
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 30 MINUTES
$$
Fitzsimmons2 follow-up statements
024
WGUS71 KPHI 051945
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
345 PM EDT Wed Aug 5 2026
NJC005-021-PAC017-052130-
/O.CON.KPHI.FF.W.0098.000000T0000Z-260805T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-Bucks PA-
345 PM EDT Wed Aug 5 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM EDT THIS
AFTERNOON FOR SOUTH CENTRAL MERCER, NORTHEASTERN BURLINGTON AND
SOUTHEASTERN BUCKS COUNTIES...
At 345 PM EDT, Doppler radar and automated rain gauges indicated
rainfall amounts of 1 to 2 inches have fallen with the heavy
rainfall that moved through the area this afternoon. There have also
been multiple reports of road flooding. The heaviest rain has
tapered off at this time but it will still take some time for the
waters to fully recede so the Flash Flood Warning remains in effect.
There may also be some additional showers moving through the area
through early this evening.
HAZARD...Flash flooding caused by heavy rain.
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, Ewing, Florence, Burlington, Bristol, Bordentown,
Yardley, Tullytown, Langhorne, Pemberton, Wrightstown and Columbus.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 48 and 66.
New Jersey Turnpike between exits 6 and 7A.
Interstate 195 in New Jersey between mile markers 0 and 5.
Pennsylvania Turnpike between mile markers 356 and 359.
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 4023 7484 4027 7467 4025 7466 4000 7451
3999 7451 3998 7450 3993 7472 4006 7484
4019 7493
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 30 MINUTES
$$
Fitzsimmons319
WGUS71 KPHI 052121
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
521 PM EDT Wed Aug 5 2026
NJC005-021-PAC017-052131-
/O.EXP.KPHI.FF.W.0098.000000T0000Z-260805T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-Bucks PA-
521 PM EDT Wed Aug 5 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 530 PM EDT THIS AFTERNOON FOR
SOUTH CENTRAL MERCER, NORTHEASTERN 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 4023 7484 4027 7467 4025 7466 4000 7451
3999 7451 3998 7450 3993 7472 4006 7484
4019 7493
$$
FitzsimmonsThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 12:58 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 6 hr |
| Aug 5, 1:13 PM EDT | Flash Flood Warning | PHI | Delaware, Montgomery, Philadelphia | 5 hr |
| Aug 5, 1:50 PM EDT | Heat Advisory | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 3 days |
| Aug 5, 2:17 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
| Aug 5, 2:50 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Aug 5, 3:33 PM EDT | Flash Flood Warning | PHI | Bucks | 86 min |
| Aug 5, 5:29 PM EDT | Flash Flood Warning | PHI | Middlesex | 3 hr |
Nearby
Flash Flood Warnings in New Jersey, 2026Flash Flood Warnings in Pennsylvania, 2026Every flash flood warning in 2026
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.