Alert archive / New Jersey / Flash Flood Warnings in 2021
Flash Flood Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 9, 2021, 2:21 PM EDT for Cumberland County, Gloucester County, Salem County, New Jersey; New Castle County, Delaware. It was in force for 73 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2021, 2:21 PM EDT (18:21 UTC)
- Expired
- Jun 9, 2021, 3:34 PM EDT
- In force
- 73 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties New Castle County, DE, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 92 km from the middle of the area, began a volume at 18:24 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.4 hours before the alert went out and 184 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
- 193 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -75 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
372
WGUS51 KPHI 091821
FFWPHI
DEC003-NJC011-015-033-092230-
/O.NEW.KPHI.FF.W.0007.210609T1821Z-210609T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
221 PM EDT Wed Jun 9 2021
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
New Castle County in northern Delaware...
Northwestern Cumberland County in southern New Jersey...
Southwestern Gloucester County in southern New Jersey...
Salem County in southern New Jersey...
* Until 630 PM EDT.
* At 221 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. 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 will experience flash flooding include...
Wilmington, Newark, Pennsville, Carneys Point, Elsmere, New
Castle, Penns Grove, Salem, Woodstown, Alloway, Quinton, and
Swedesboro.
This includes the following highways...
New Jersey Turnpike near exit 1.
Interstate 95 in Delaware between mile markers 3 and 22.
Interstate 295 in New Jersey between mile markers 0 and 13.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3938 7559 3966 7575 3975 7571 3984 7557
3981 7544 3981 7543 3980 7542 3980 7541
3981 7540 3979 7533 3958 7506 3938 7540
3938 7541
FLASH FLOOD...RADAR INDICATED
$$
NC1 follow-up statement
159
WGUS71 KPHI 091934
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
334 PM EDT Wed Jun 9 2021
DEC003-NJC011-015-033-091944-
/O.CAN.KPHI.FF.W.0007.000000T0000Z-210609T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Cumberland NJ-Gloucester NJ-Salem NJ-
334 PM EDT Wed Jun 9 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NEW CASTLE, NORTHWESTERN
CUMBERLAND, SOUTHWESTERN GLOUCESTER, AND SALEM COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3938 7559 3966 7575 3975 7571 3984 7557
3984 7556 3981 7544 3981 7543 3980 7542
3980 7541 3981 7540 3979 7533 3958 7506
3938 7540
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 8:40 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jun 9, 1:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 9, 1:48 PM EDT | Special Weather Statement | PHI | Salem | 27 min |
| Jun 9, 1:52 PM EDT | Special Weather Statement | PHI | Atlantic | 23 min |
| Jun 9, 2:07 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 23 min |
| Jun 9, 2:14 PM EDT | Special Weather Statement | PHI | Salem | 31 min |
| Jun 9, 2:47 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jun 9, 3:32 PM EDT | Special Weather Statement | PHI | Burlington | 28 min |
| Jun 9, 3:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jun 9, 3:49 PM EDT | Flash Flood Warning | PHI | Burlington | 3 hr |
| Jun 9, 3:51 PM EDT | Special Weather Statement | PHI | Hunterdon | 24 min |
| Jun 9, 5:32 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Monmouth | 28 min |
| Jun 9, 6:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 9, 6:50 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 87 min |
| Jun 9, 7:42 PM EDT | Special Marine Warning | PHI | 63 min | |
| Jun 8, 8:15 PM EDT | Special Weather Statement | PHI | Sussex | 45 min |
| Jun 9, 7:54 AM EDT | River Flood Warning | PHI | New Castle | 5 hr |
| Jun 9, 1:35 PM EDT | Special Weather Statement | PHI | New Castle | 25 min |
| Jun 9, 2:26 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 64 min |
| Jun 9, 2:28 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 62 min |
| Jun 9, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 64 min |
| Jun 9, 3:24 PM EDT | Areal Flood Advisory | PHI | Sussex | 3 hr |
| Jun 9, 4:32 PM EDT | Areal Flood Advisory | PHI | Sussex | 108 min |
| Jun 9, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 27 min |
Nearby
Flash Flood Warnings in New Jersey, 2021Flash Flood Warnings in Delaware, 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.