Alert archive / New Jersey / Flash Flood Warnings in 2023
Flash Flood Warning 87, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 11, 2023, 5:43 PM EDT for Middlesex County, New Jersey. It was in force for 3 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
- Sep 11, 2023, 5:43 PM EDT (21:43 UTC)
- Expired
- Sep 11, 2023, 8:35 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Middlesex County, NJ
The radar
The Philadelphia radar (KDIX), 66 km from the middle of the area, began a volume at 21:46 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 11, 6:05 PM EDT | FLOOD | 1 Se Metuchen, NJ | Received video of street flooding on Amboy Avenue in Edison. |
| Sep 11, 6:08 PM EDT | FLOOD | 1 E Parlin, NJ | Report of road flooding at the intersection of Route 9 and County Route 615. No water rescues at this time, but traffic is at standstill due to high waters. |
| Sep 11, 6:08 PM EDT | FLOOD | 1 Nw South Amboy, NJ | Report of road flooding at the intersection of Route 35 and Route 9 near Sayreville. |
| Sep 11, 6:08 PM EDT | FLOOD | 1 Wsw Iselin, NJ | Received photos of street flooding at the intersection of Calvert Ave and Lench Ave in Edison. |
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, 9.7 hours before the alert went out and 127 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
- 726 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
652
WGUS51 KPHI 112143
FFWPHI
NJC023-120045-
/O.NEW.KPHI.FF.W.0087.230911T2143Z-230912T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
543 PM EDT Mon Sep 11 2023
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northeastern Middlesex County in northern New Jersey...
* Until 845 PM EDT.
* At 543 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. The expected rainfall rate is 1 to 1.5 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...
New Brunswick, Perth Amboy, Somerset, Edison, East Brunswick,
Sayreville, Carteret, Middlesex, Colonia, Society Hill,
Woodbridge, and South Plainfield.
This includes the following highways...
New Jersey Turnpike between exits 11 and 13.
Interstate 287 in New Jersey between mile markers 0 and 8.
Garden State Parkway between mile markers 122 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Flooding is occurring or is imminent. Most flood related deaths
occur in automobiles. Do not attempt to cross water covered bridges,
dips, or low water crossings. Never try to cross a flowing stream,
even a small one, on foot. To escape rising water find another route
over higher ground.
&&
LAT...LON 4055 7449 4059 7448 4061 7431 4059 7429
4060 7426 4060 7421 4059 7420 4056 7422
4055 7425 4052 7425 4050 7426 4050 7428
4049 7429 4049 7427 4047 7427 4046 7426
4046 7424 4044 7425 4049 7446
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 1 HOUR
$$
PO2 follow-up statements
957
WGUS71 KPHI 112314
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
714 PM EDT Mon Sep 11 2023
NJC023-120045-
/O.CON.KPHI.FF.W.0087.000000T0000Z-230912T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-
714 PM EDT Mon Sep 11 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT THIS
EVENING FOR NORTHEASTERN MIDDLESEX COUNTY...
At 714 PM EDT, Doppler radar indicated that the thunderstorms that
produced the excessive rains earlier have moved away. Lingering
flooding continues across the region.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
New Brunswick, Perth Amboy, Edison, East Brunswick, Sayreville,
Carteret, Colonia, Society Hill, Woodbridge, South Plainfield,
Highland Park, and Metuchen.
This includes the following highways...
New Jersey Turnpike between exits 11 and 13.
Interstate 287 in New Jersey between mile markers 0 and 6.
Garden State Parkway between mile markers 123 and 134.
Flooding was observed earlier in Edison and near Sayreville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4054 7445 4058 7444 4061 7432 4061 7431
4059 7429 4060 7426 4059 7420 4056 7422
4055 7425 4052 7425 4050 7426 4050 7428
4049 7429 4049 7427 4046 7426 4046 7424
4044 7425 4049 7444
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 1 HOUR
$$
PO751
WGUS71 KPHI 120035
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
835 PM EDT Mon Sep 11 2023
NJC023-120045-
/O.CAN.KPHI.FF.W.0087.000000T0000Z-230912T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-
835 PM EDT Mon Sep 11 2023
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN MIDDLESEX
COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat.
LAT...LON 4054 7445 4058 7444 4061 7432 4061 7431
4059 7429 4060 7426 4059 7420 4056 7422
4055 7425 4052 7425 4050 7426 4050 7428
4049 7429 4049 7427 4046 7426 4046 7424
4044 7425 4049 7444
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 9:03 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 3 hr |
| Sep 10, 9:37 PM EDT | Flash Flood Warning | PHI | Burlington, Camden | 4 hr |
| Sep 10, 10:00 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 3 hr |
| Sep 10, 10:31 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 3 hr |
| Sep 10, 10:47 PM EDT | Areal Flood Advisory | PHI | Monmouth | 2 hr |
| Sep 11, 12:03 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Cumberland, Gloucester, Salem | 3 hr |
| Sep 11, 3:04 PM EDT | Special Marine Warning | PHI | 41 min | |
| Sep 11, 4:26 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington | 82 min |
| Sep 11, 4:30 PM EDT | Special Weather Statement | PHI | Essex | 30 min |
| Sep 11, 4:43 PM EDT | Areal Flood Advisory | PHI | Morris | 108 min |
| Sep 11, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 35 min |
| Sep 11, 6:21 PM EDT | Special Marine Warning | PHI | 54 min | |
| Sep 11, 6:47 PM EDT | Special Weather Statement | PHI | Monmouth | 58 min |
| Sep 11, 7:01 PM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 6 hr |
| Sep 11, 7:12 PM EDT | Special Marine Warning | PHI | 63 min |
Nearby
Flash Flood Warnings in New Jersey, 2023Every flash flood warning in 2023
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.