Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 36, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 9, 2026, 3:01 PM EDT for Burlington County, New Jersey; 4 counties in Pennsylvania. It was in force for 4 hr. 4 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
- Jul 9, 2026, 3:01 PM EDT (19:01 UTC)
- Expired
- Jul 9, 2026, 7:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 50 km from the middle of the area, began a volume at 19:03 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 |
|---|---|---|---|
| Jul 9, 4:26 PM EDT | FLASH FLOOD | 1 S Lenola, NJ | Flooding on NJ 38 Eastbound East of NJ 41 (Maple Shade Twp). 1 left lane of 2 lanes closed. |
| Jul 9, 4:51 PM EDT | FLASH FLOOD | 3 Nne Mount Laurel, NJ | Flooding on NJ 38 Westbound East of Larchmont Blvd (Mount Laurel Twp). 1 right lane of 3 lanes, right shoulder closed. |
| Jul 9, 5:30 PM EDT | RAIN 2 | 1 Wsw Cinnaminson, NJ | Mesonet station AR824 Cinnaminson. |
| Jul 9, 5:51 PM EDT | FLOOD | 1 N Fellowship, NJ | Report from mPING: River/Creek overflowing; Cropland/Yard/Basement Flooding. |
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, 7.0 hours before the alert went out and 206 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
- 20 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 986 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
361
WGUS51 KPHI 091901
FFWPHI
NJC005-PAC017-045-091-101-092300-
/O.NEW.KPHI.FF.W.0036.260709T1901Z-260709T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
301 PM EDT Thu Jul 9 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northwestern Burlington County in southern New Jersey...
South Central Bucks County in southeastern Pennsylvania...
Northeastern Delaware County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 700 PM EDT.
* At 301 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 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...
Philadelphia, Bensalem, Evesham, Mount Laurel, Willingboro,
Medford, Lumberton, Yeadon, Burlington, Bristol, Mount Holly and
Riverside.
People attending Lemon Hill should seek shelter immediately.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 36 and 51.
Interstate 476 in Pennsylvania between mile markers 7 and 9.
New Jersey Turnpike between exits 4 and 6A.
Interstate 76 in Pennsylvania between mile markers 335 and 344.
Interstate 95 in Pennsylvania between mile markers 27 and 40.
Interstate 676 in Pennsylvania near mile marker 0.
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 4010 7477 3980 7470 3983 7492 3989 7493
3993 7498 3994 7498 3995 7501 3998 7501
4000 7503 4000 7509 3989 7532 3998 7536
4023 7506
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Cooper2 follow-up statements
426
WGUS71 KPHI 092016
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
416 PM EDT Thu Jul 9 2026
NJC005-PAC017-045-091-101-092300-
/O.CON.KPHI.FF.W.0036.000000T0000Z-260709T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Bucks PA-Delaware PA-Montgomery PA-Philadelphia PA-
416 PM EDT Thu Jul 9 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING
FOR NORTHWESTERN BURLINGTON, SOUTH CENTRAL BUCKS, EAST CENTRAL
DELAWARE, SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES...
At 416 PM EDT, Doppler radar and automated rain gauges 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 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...
Philadelphia, Bensalem, Evesham, Mount Laurel, Willingboro,
Medford, Lumberton, Yeadon, Burlington, Bristol, Mount Holly and
Riverside.
People attending Lemon Hill should seek shelter immediately.
This includes the following highways...
Interstate 295 in New Jersey between mile markers 37 and 51.
Interstate 476 in Pennsylvania between mile markers 7 and 9.
New Jersey Turnpike between exits 4 and 6A.
Interstate 76 in Pennsylvania between mile markers 337 and 344.
Interstate 95 in Pennsylvania between mile markers 27 and 40.
Interstate 676 in Pennsylvania near mile marker 0.
Pennsylvania Turnpike between mile markers 347 and 359.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3998 7536 4019 7500 4010 7477 3984 7472
3983 7491 3989 7493 3993 7498 3994 7498
3995 7501 3998 7501 4000 7503 4000 7509
3989 7532
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Cooper907
WGUS71 KPHI 092256 RRA
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
656 PM EDT Thu Jul 9 2026
NJC005-PAC017-045-091-101-092306-
/O.EXP.KPHI.FF.W.0036.000000T0000Z-260709T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Bucks PA-Delaware PA-Montgomery PA-Philadelphia PA-
656 PM EDT Thu Jul 9 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 7 PM EDT THIS EVENING FOR
NORTHWESTERN BURLINGTON, SOUTH CENTRAL BUCKS, EAST CENTRAL DELAWARE,
SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES...
The heavy rain has ended. Please continue to heed remaining road
closures.
A Flood Watch remains in effect until 1200 AM EDT for a portion of
southeast Pennsylvania.
A Flood Watch remains in effect until 1200 AM EDT for portions of
northern Delaware and southern New Jersey.
A Flood Watch remains in effect until 1200 AM EDT for a portion of
southern New Jersey.
&&
LAT...LON 3998 7536 4019 7500 4010 7477 3984 7472
3983 7491 3989 7493 3993 7498 3994 7498
3995 7501 3998 7501 4000 7503 4000 7509
3989 7532
$$
CooperThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 2:09 AM EDT | Flood Watch | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 6 more | 19 hr |
| Jul 9, 1:22 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 4 hr |
| Jul 9, 1:37 PM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 6 hr |
| Jul 9, 2:00 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 5 hr |
| Jul 9, 2:42 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth | 4 hr |
| Jul 9, 4:32 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Jul 9, 5:30 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 45 min |
| Jul 9, 5:34 PM EDT | Special Marine Warning | PHI | 26 min | |
| Jul 9, 7:31 PM EDT | Flash Flood Warning | PHI | Atlantic, Cape May, Cumberland | 119 min |
| Jul 9, 3:20 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 3 hr |
| Jul 9, 3:38 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Jul 9, 4:30 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.