Alert archive / New Jersey / Flash Flood Warnings in 2021
Flash Flood Warning 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 2, 2021, 7:41 PM EDT for Burlington County, Camden County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 3 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 2, 2021, 7:41 PM EDT (23:41 UTC)
- Expired
- Jul 2, 2021, 10:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Camden County, NJ, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 23:42 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, 11.7 hours before the alert went out and 209 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
- 51 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
126
WGUS51 KPHI 022341
FFWPHI
NJC005-007-PAC101-030245-
/O.NEW.KPHI.FF.W.0013.210702T2341Z-210703T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
741 PM EDT Fri Jul 2 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...
South Central Philadelphia County in southeastern Pennsylvania...
* Until 1045 PM EDT.
* At 741 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1 inch of rain
has fallen. Additional rainfall amounts of 0.5 to 1 inch are
possible in the warned area, which will be sufficient to cause
flash flooding in this urbanized 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 will experience flash flooding include...
Philadelphia, Camden, Gloucester City, Willingboro, Bellmawr,
Riverside, Palmyra, Beverly, Audubon Park, Cherry Hill Mall,
Golden Triangle, and Erlton-Ellisburg.
This includes the following highways...
Interstate 95 in Pennsylvania near mile marker 20.
Interstate 76 in New Jersey between mile markers 1 and 3.
Interstate 295 in New Jersey near mile marker 46.
Interstate 676 in New Jersey between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3993 7516 3999 7506 4007 7493 4002 7484
3987 7509
FLASH FLOOD...RADAR INDICATED
$$
JEO2 follow-up statements
343
WGUS71 KPHI 030109
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
909 PM EDT Fri Jul 2 2021
NJC005-007-PAC101-030245-
/O.CON.KPHI.FF.W.0013.000000T0000Z-210703T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Philadelphia PA-
909 PM EDT Fri Jul 2 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT THIS
EVENING FOR NORTHWESTERN BURLINGTON, NORTHWESTERN CAMDEN, AND SOUTH
CENTRAL PHILADELPHIA COUNTIES...
At 909 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between 1
and 1.5 inches of rain have fallen. Additional rainfall amounts up
to 0.5 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that will experience flash flooding include...
Philadelphia, Camden, Gloucester City, Willingboro, Bellmawr,
Riverside, Palmyra, Beverly, Audubon Park, Cherry Hill Mall,
Golden Triangle, and Erlton-Ellisburg.
This includes the following highways...
Interstate 95 in Pennsylvania near mile marker 20.
Interstate 76 in New Jersey between mile markers 1 and 3.
Interstate 676 in New Jersey between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3993 7516 3999 7506 4007 7493 4002 7484
3987 7509
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
JEO871
WGUS71 KPHI 030236
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1036 PM EDT Fri Jul 2 2021
NJC005-007-PAC101-030246-
/O.EXP.KPHI.FF.W.0013.000000T0000Z-210703T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Philadelphia PA-
1036 PM EDT Fri Jul 2 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 1045 PM EDT THIS EVENING FOR
NORTHWESTERN BURLINGTON, NORTHWESTERN CAMDEN, AND SOUTH CENTRAL
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 3993 7516 3999 7506 4007 7493 4002 7484
3987 7509
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 11:31 PM EDT | Special Weather Statement | PHI | Salem | 29 min |
| Jul 1, 11:40 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland, Gloucester, Salem | 39 min |
| Jul 2, 4:31 AM EDT | Areal Flood Warning | PHI | Cumberland | 6 hr |
| Jul 2, 10:40 AM EDT | Areal Flood Warning | PHI | Cumberland | 6 hr |
| Jul 2, 11:16 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 119 min |
| Jul 2, 12:12 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 97 min |
| Jul 2, 1:11 PM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 59 min |
| Jul 2, 1:47 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Gloucester, Ocean, Salem | 116 min |
| Jul 2, 3:48 PM EDT | Small Craft Advisory | PHI | 31 hr | |
| Jul 2, 4:47 PM EDT | Special Weather Statement | PHI | Sussex | 28 min |
| Jul 2, 6:42 PM EDT | Special Weather Statement | PHI | Warren | 48 min |
| Jul 2, 6:53 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 52 min |
| Jul 2, 7:25 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 50 min |
| Jul 2, 7:33 PM EDT | Special Weather Statement | PHI | Cumberland | 42 min |
| Jul 2, 4:54 PM EDT | Flash Flood Warning | PHI | Montgomery, Philadelphia | 5 hr |
| Jul 2, 5:29 PM EDT | Special Weather Statement | PHI | Carbon | 46 min |
| Jul 2, 5:44 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 46 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.