Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 17, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 5, 2026, 7:30 PM EDT for Burlington County, Mercer County, New Jersey; Bucks County, Montgomery County, Philadelphia County, Pennsylvania. 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
- Jul 5, 2026, 7:30 PM EDT (23:30 UTC)
- Expired
- Jul 5, 2026, 9:46 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Mercer County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 51 km from the middle of the area, began a volume at 23:30 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, 11.5 hours before the alert went out and 194 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
- 113 J/kg
- Mixed-layer CIN
- -163 J/kg
- Mixed-layer LCL
- 849 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.7
The text
As transmitted.
696
WGUS51 KPHI 052330
FFWPHI
NJC005-021-PAC017-091-101-060330-
/O.NEW.KPHI.FF.W.0017.260705T2330Z-260706T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
730 PM EDT Sun Jul 5 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southwestern Mercer County in central New Jersey...
Northwestern Burlington County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Northern Philadelphia County in southeastern Pennsylvania...
* Until 1130 PM EDT.
* At 730 PM EDT, Doppler radar indicated thunderstorms producing
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 1.5 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...
Philadelphia, Trenton, Bensalem, Florence, Burlington, Bristol,
Riverside, Hatboro, Jenkintown, Bordentown, Beverly and Rockledge.
People attending St. Michaels Fair should seek shelter immediately.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 58 and 60.
Interstate 195 in New Jersey near mile marker 0.
Interstate 95 in Pennsylvania between mile markers 30 and 40.
Pennsylvania Turnpike between mile markers 339 and 359.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4016 7516 4024 7506 4026 7499 4025 7487
4022 7479 4017 7470 4014 7472 4011 7480
4008 7486 4002 7496 4002 7513 4006 7524
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Hoeflich2 follow-up statements
644
WGUS71 KPHI 060032
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
832 PM EDT Sun Jul 5 2026
NJC005-021-060042-
/O.CAN.KPHI.FF.W.0017.000000T0000Z-260706T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Mercer NJ-
832 PM EDT Sun Jul 5 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN MERCER AND
NORTHWESTERN BURLINGTON COUNTIES...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flood Watch remains in effect until 800 PM EDT Monday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4016 7516 4024 7506 4026 7499 4025 7487
4022 7479 4021 7477 4019 7475 4018 7474
4016 7472 4015 7472 4014 7474 4013 7476
4012 7478 4013 7482 4010 7484 4008 7486
4007 7494 4002 7501 4002 7513 4006 7524
$$
PAC017-091-101-060330-
/O.CON.KPHI.FF.W.0017.000000T0000Z-260706T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Montgomery PA-Philadelphia PA-
832 PM EDT Sun Jul 5 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT THIS
EVENING FOR SOUTHEASTERN BUCKS, SOUTHEASTERN MONTGOMERY AND NORTHERN
PHILADELPHIA COUNTIES...
At 832 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.5 and 2 inches of rain have
fallen. The expected rainfall rate is 0.5 inches in 1 hour.
Additional rainfall amounts up to 0.5 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...
Philadelphia, Trenton, Bensalem, Burlington, Bristol, Hatboro,
Jenkintown, Rockledge, Yardley, Newtown, Tullytown and Abington.
People attending St. Michaels Fair should seek shelter immediately.
This includes the following highways...
Interstate 95 in Pennsylvania between mile markers 29 and 40.
Pennsylvania Turnpike between mile markers 340 and 359.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4016 7516 4024 7506 4026 7499 4025 7487
4022 7479 4021 7477 4019 7475 4018 7474
4016 7472 4015 7472 4014 7474 4013 7476
4012 7478 4013 7482 4010 7484 4008 7486
4007 7494 4002 7501 4002 7513 4006 7524
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...0.5 INCHES IN 1 HOUR
$$
Hoeflich266
WGUS71 KPHI 060146
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
946 PM EDT Sun Jul 5 2026
PAC017-091-101-060156-
/O.CAN.KPHI.FF.W.0017.000000T0000Z-260706T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Montgomery PA-Philadelphia PA-
946 PM EDT Sun Jul 5 2026
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN BUCKS,
SOUTHEASTERN MONTGOMERY AND NORTHERN PHILADELPHIA COUNTIES...
The heavy rain has ended for now. Another round of heavy rain is
expected later tonight. A future Flash Flood Warning may be needed.
Please continue to heed remaining road closures and have multiple
ways to receive any new warnings.
A Flood Watch remains in effect until 800 PM EDT Monday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4016 7516 4024 7506 4026 7499 4025 7487
4022 7479 4021 7477 4019 7475 4018 7474
4016 7472 4015 7472 4014 7474 4013 7476
4012 7478 4013 7482 4010 7484 4008 7486
4007 7494 4002 7501 4002 7513 4006 7524
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 8:20 PM EDT | Special Marine Warning | PHI | 85 min | |
| Jul 4, 8:28 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 62 min |
| Jul 4, 8:38 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 52 min |
| Jul 4, 8:48 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 57 min |
| Jul 4, 8:59 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester, Salem | 46 min |
| Jul 4, 9:13 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 62 min |
| Jul 4, 9:15 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 75 min |
| Jul 4, 9:24 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 4, 9:25 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jul 4, 9:38 PM EDT | Special Marine Warning | PHI | 97 min | |
| Jul 4, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Ocean | 49 min |
| Jul 4, 9:50 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Monmouth, Ocean | 55 min |
| Jul 4, 10:04 PM EDT | Special Marine Warning | PHI | 56 min | |
| Jul 4, 10:52 PM EDT | Heat Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 9 more | 21 hr |
| Jul 4, 10:52 PM EDT | Special Marine Warning | PHI | 83 min | |
| Jul 4, 11:08 PM EDT | Special Marine Warning | PHI | 47 min | |
| Jul 5, 2:33 AM EDT | Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 41 hr |
| Jul 5, 7:06 PM EDT | Special Marine Warning | PHI | 47 min | |
| Jul 4, 8:25 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 65 min |
| Jul 5, 7:33 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 28 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2026Flash Flood Warnings in New Jersey, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.