Alert archive / New Jersey / Flash Flood Warnings in 2026
Flash Flood Warning 16, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 28, 2026, 7:51 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Delaware County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 114 min. 13 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
- Jun 28, 2026, 7:51 PM EDT (23:51 UTC)
- Expired
- Jun 28, 2026, 9:45 PM EDT
- In force
- 114 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 60 km from the middle of the area, began a volume at 23:53 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 |
|---|---|---|---|
| Jun 28, 7:55 PM EDT | RAIN 1.25 | Maple Glen, PA | PWS report shared on social media. 1.25 inches of rain in less than an hour. |
| Jun 28, 7:55 PM EDT | RAIN 1.25 | Maple Glen, PA | PWS report shared on social media. 1.25 inches of rain in less than an hour. |
| Jun 28, 7:55 PM EDT | RAIN 1.32 | 1 Ene Oreland, PA | Mesonet station GW7220 ORELAND. |
| Jun 28, 7:55 PM EDT | RAIN 1.32 | 1 Ene Oreland, PA | Mesonet station GW7220 ORELAND. |
| Jun 28, 7:57 PM EDT | RAIN 1.59 | 1 Nnw Oreland, PA | Mesonet station EW7157 Fort Washington. |
| Jun 28, 7:57 PM EDT | RAIN 1.59 | 1 Nnw Oreland, PA | Mesonet station EW7157 Fort Washington. |
| Jun 28, 8:00 PM EDT | RAIN 1.48 | 1 Wsw Ardsley, PA | Mesonet station CW5430 North Hills. |
| Jun 28, 8:00 PM EDT | RAIN 1.48 | 1 Wsw Ardsley, PA | Mesonet station CW5430 North Hills. |
| Jun 28, 8:00 PM EDT | RAIN 1.61 | Wyncote, PA | PWS report. |
| Jun 28, 8:00 PM EDT | RAIN 1.76 | 1 N Glenside, PA | PWS report. |
| Jun 28, 8:05 PM EDT | RAIN 1.51 | Olney - Philadelphia, PA | PWS report. |
| Jun 28, 8:15 PM EDT | FLASH FLOOD | 1 Wsw Elkins Park, PA | Water rescue at Cheltenham Avenue and north 21st Street in Cheltenham. |
| Jun 28, 8:30 PM EDT | FLASH FLOOD | 1 Ssw Summerdale, PA | Frankford Creek (FCRP1) reached moderate flood stage. |
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, 11.9 hours before the alert went out and 207 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
- 958 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
533
WGUS51 KPHI 282351
FFWPHI
NJC005-007-015-PAC045-091-101-290245-
/O.NEW.KPHI.FF.W.0016.260628T2351Z-260629T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
751 PM EDT Sun Jun 28 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northwestern Burlington County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
North Central Gloucester County in southern New Jersey...
Northeastern Delaware County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 1045 PM EDT.
* At 751 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. The expected rainfall rate is
1.5 to 2 inches in 1 hour. 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, Camden, Gloucester City, Norristown, Willingboro,
West Norriton, East Norriton, Yeadon, Riverside, Conshohocken,
Palmyra and Hatboro.
People attending Philadelphia Stadium and Lemon Hill should seek
shelter immediately.
This includes the following highways...
Interstate 476 in Pennsylvania between mile markers 15 and 19.
Interstate 76 in Pennsylvania between mile markers 330 and 351.
Interstate 95 in Pennsylvania between mile markers 12 and 33.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 1 and 4.
Northeast Extension between mile markers 21 and 25.
Interstate 76 in New Jersey between mile markers 2 and 3.
Pennsylvania Turnpike between mile markers 329 and 345.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4022 7524 4024 7519 4010 7496 4008 7496
4006 7498 4005 7497 4007 7493 4007 7491
4004 7486 3983 7523 3995 7530 4015 7540
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1.5-2 INCHES IN 1 HOUR
$$
Fitzsimmons1 follow-up statement
296
WGUS71 KPHI 290145
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
945 PM EDT Sun Jun 28 2026
NJC005-007-015-PAC045-091-101-290155-
/O.CAN.KPHI.FF.W.0016.000000T0000Z-260629T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Gloucester NJ-Delaware PA-Montgomery PA-
Philadelphia PA-
945 PM EDT Sun Jun 28 2026
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN BURLINGTON,
NORTHWESTERN CAMDEN, NORTH CENTRAL GLOUCESTER, NORTHEASTERN
DELAWARE, SOUTHEASTERN MONTGOMERY AND PHILADELPHIA COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 4022 7524 4024 7519 4010 7496 4008 7496
4006 7498 4005 7497 4007 7493 4007 7491
4004 7486 3983 7523 3995 7530 4015 7540
$$
FitzsimmonsThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:57 AM EDT | Extreme Heat Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 71 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.