Alert archive / New Jersey / Flash Flood Warnings in 2021
Flash Flood Warning 79, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 1, 2021, 10:24 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Bucks County, Philadelphia County, Pennsylvania. 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
- Sep 1, 2021, 10:24 PM EDT (02:24 UTC)
- Expired
- Sep 2, 2021, 2:30 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Bucks County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 02:23 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 |
|---|---|---|---|
| Sep 2, 12:13 AM EDT | FLASH FLOOD | 1 Ne Bristol, PA | GREEN LANE CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 2, 12:33 AM EDT | FLASH FLOOD | 1 Nnw Collingswood, NJ | U.S. HIGHWAY 30 CLOSED AT AIRPORT CIRCLE FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
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 00:00Z, 2.4 hours before the alert went out and 210 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
- 123 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 456 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
838
WGUS51 KPHI 020224
FFWPHI
NJC005-007-015-PAC017-101-020630-
/O.NEW.KPHI.FF.W.0079.210902T0224Z-210902T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1024 PM EDT Wed Sep 1 2021
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...
Northwestern Gloucester County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
Southeastern Philadelphia County in southeastern Pennsylvania...
* Until 230 AM EDT.
* At 1024 PM EDT, local law enforcement reported flash flooding
across the warned area. Several roads are closed in Westville, and
flooding is occurring near the Delaware River in Burlington
County. Between 1 and 3 inches of rain have fallen. Flash flooding
is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
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, Cherry Hill, Mount Laurel,
Willingboro, Deptford, West Deptford, Florence, Bellmawr,
Woodbury, and Burlington.
This includes the following highways...
New Jersey Turnpike between exits 2 and 6A.
Pennsylvania Turnpike near mile marker 359.
Interstate 95 in Pennsylvania between mile markers 17 and 18.
Interstate 76 in Pennsylvania near mile marker 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 16 and 55.
Interstate 676 in New Jersey between mile markers 0 and 2.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3988 7519 4007 7492 4013 7483 4015 7473
4008 7472 3979 7508 3970 7519 3977 7534
FLASH FLOOD...OBSERVED
$$
CMS2 follow-up statements
918
WGUS71 KPHI 020307
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1107 PM EDT Wed Sep 1 2021
NJC005-007-015-PAC017-101-020630-
/O.CON.KPHI.FF.W.0079.000000T0000Z-210902T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Gloucester NJ-Bucks PA-Philadelphia PA-
1107 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM EDT THURSDAY
FOR NORTHWESTERN BURLINGTON, NORTHWESTERN CAMDEN, NORTHWESTERN
GLOUCESTER, SOUTHEASTERN BUCKS, AND SOUTHEASTERN PHILADELPHIA
COUNTIES...
At 1107 PM EDT, local law enforcement reported flash flooding across
the warned area. Several roads are closed in Camden, Westville, and
Palmyra. Between 1 and 3 inches of rain have fallen. Flash flooding
is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Philadelphia, Camden, Gloucester City, Cherry Hill, Mount Laurel,
Willingboro, Deptford, West Deptford, Florence, Bellmawr,
Woodbury, and Burlington.
This includes the following highways...
New Jersey Turnpike between exits 2 and 6A.
Pennsylvania Turnpike near mile marker 359.
Interstate 95 in Pennsylvania between mile markers 17 and 18.
Interstate 76 in Pennsylvania near mile marker 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 16 and 55.
Interstate 676 in New Jersey between mile markers 0 and 2.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3988 7519 4007 7492 4013 7483 4015 7473
4008 7472 3979 7508 3970 7519 3977 7534
FLASH FLOOD...OBSERVED
$$
CMS198
WGUS71 KPHI 020630
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
230 AM EDT Thu Sep 2 2021
NJC005-007-015-PAC017-101-020640-
/O.EXP.KPHI.FF.W.0079.000000T0000Z-210902T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Gloucester NJ-Bucks PA-Philadelphia PA-
230 AM EDT Thu Sep 2 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN BURLINGTON,
NORTHWESTERN CAMDEN, NORTHWESTERN GLOUCESTER, SOUTHEASTERN BUCKS,
AND SOUTHEASTERN PHILADELPHIA COUNTIES...
The flash flood warning has been replaced by a flood warning. Please
refer to that bulletin for more information.
LAT...LON 3988 7519 4007 7492 4013 7483 4015 7473
4008 7472 3979 7508 3970 7519 3977 7534
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 8:02 PM EDT | Flash Flood Warning | PHI | Middlesex, Morris, Somerset | 5 hr |
| Sep 1, 9:01 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 5 hr |
| Sep 1, 9:43 PM EDT | River Flood Warning | PHI | Mercer | 33 hr |
| Sep 1, 10:05 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 4 hr |
| Sep 1, 10:23 PM EDT | Coastal Flood Statement | PHI | Ocean | 13 hr |
| Sep 1, 10:29 PM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 49 hr |
| Sep 1, 10:32 PM EDT | River Flood Warning | PHI | Mercer | 31 hr |
| Sep 1, 10:35 PM EDT | River Flood Warning | PHI | Bergen, Morris, Passaic | 30 hr |
| Sep 1, 10:37 PM EDT | River Flood Warning | PHI | Morris, Passaic | 41 hr |
| Sep 1, 10:38 PM EDT | River Flood Warning | PHI | Morris, Somerset | 21 days |
| Sep 1, 10:47 PM EDT | Areal Flood Warning | PHI | Warren | 23 hr |
| Sep 1, 10:52 PM EDT | Areal Flood Warning | PHI | Hunterdon, Warren | 12 hr |
| Sep 2, 12:01 AM EDT | Areal Flood Warning | PHI | Hunterdon, Morris, Sussex, Warren | 40 hr |
| Sep 2, 12:28 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Gloucester | 3 hr |
| Sep 2, 12:31 AM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 2 hr |
| Sep 2, 1:38 AM EDT | Areal Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 4 hr |
| Sep 2, 1:52 AM EDT | Areal Flood Warning | PHI | Morris, Somerset | 13 hr |
| Sep 2, 2:23 AM EDT | Areal Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 9 hr |
| Sep 2, 2:29 AM EDT | Areal Flood Warning | PHI | Burlington, Camden, Gloucester | 5 hr |
| Sep 2, 3:52 AM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Morris, Somerset, Warren | 8 hr |
| Sep 2, 3:53 AM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 8 hr |
| Sep 2, 4:00 AM EDT | River Flood Warning | PHI | Morris | 48 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Warren | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon | 33 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 34 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Sussex, Warren | 5 hr |
| Sep 2, 6:05 AM EDT | Coastal Flood Warning | PHI | Burlington, Camden, Gloucester, Mercer | 6 hr |
| Sep 2, 1:20 PM EDT | Areal Flood Warning | PHI | Middlesex | 21 hr |
| Sep 2, 6:44 PM EDT | Coastal Flood Advisory | PHI | Burlington, Camden, Gloucester | 7 hr |
| Sep 1, 8:29 PM EDT | River Flood Warning | PHI | Lehigh | 10 hr |
| Sep 1, 9:47 PM EDT | River Flood Warning | PHI | Berks | 18 hr |
| Sep 1, 10:42 PM EDT | Areal Flood Warning | PHI | Berks, Bucks, Montgomery | 12 hr |
| Sep 1, 11:38 PM EDT | Areal Flood Warning | PHI | Berks, Chester, Delaware, Montgomery | 10 hr |
| Sep 2, 2:41 AM EDT | Areal Flood Warning | PHI | Bucks | 14 hr |
| Sep 2, 5:02 AM EDT | River Flood Warning | PHI | Lehigh | 11 hr |
Nearby
Flash Flood Warnings in New Jersey, 2021Flash Flood Warnings in Pennsylvania, 2021Every flash flood warning in 2021
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.