Alert archive / New Jersey / Flash Flood Warnings in 2021
Flash Flood Warning 82, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 13, 2021, 9:12 PM EDT for Northampton County, Pennsylvania; Hunterdon County, Morris County, Warren County, New Jersey. It was in force for 114 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
- Sep 13, 2021, 9:12 PM EDT (01:12 UTC)
- Expired
- Sep 13, 2021, 11:06 PM EDT
- In force
- 114 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Morris County, NJ, Warren County, NJ, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 100 km from the middle of the area, began a volume at 01:15 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 00:00Z, 1.2 hours before the alert went out and 168 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
- 90 J/kg
- Mixed-layer CIN
- -236 J/kg
- Mixed-layer LCL
- 1411 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
511
WGUS51 KPHI 140112
FFWPHI
NJC019-027-041-PAC095-140515-
/O.NEW.KPHI.FF.W.0082.210914T0112Z-210914T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
912 PM EDT Mon Sep 13 2021
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southwestern Morris County in northern New Jersey...
Northeastern Hunterdon County in northwestern New Jersey...
Central Warren County in northwestern New Jersey...
Northeastern Northampton County in eastern Pennsylvania...
* Until 115 AM EDT.
* At 912 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. 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...
Hackettstown, Washington, Belvidere, Peapack And Gladstone,
Oxford, Chester, East Bangor, Beatyestown, Great Meadows-Vienna,
Brass Castle, Long Valley, and Succasunna-Kenvil.
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.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4080 7515 4088 7518 4092 7512 4082 7460
4074 7466 4073 7467 4073 7469 4073 7471
4072 7472 4073 7477
FLASH FLOOD...RADAR INDICATED
$$
MPS1 follow-up statement
066
WGUS71 KPHI 140306
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1106 PM EDT Mon Sep 13 2021
NJC019-027-041-PAC095-140316-
/O.CAN.KPHI.FF.W.0082.000000T0000Z-210914T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Morris NJ-Warren NJ-Northampton PA-
1106 PM EDT Mon Sep 13 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN MORRIS,
NORTHEASTERN HUNTERDON, CENTRAL WARREN, AND NORTHEASTERN NORTHAMPTON
COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 4080 7515 4088 7518 4092 7512 4082 7460
4074 7466 4073 7467 4073 7469 4073 7471
4072 7472 4073 7477
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 8:16 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 44 min |
| Sep 13, 8:41 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 49 min |
| Sep 13, 8:51 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 108 min |
| Sep 13, 9:03 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 109 min |
| Sep 13, 9:21 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 38 min |
| Sep 13, 9:03 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Warren | 57 min |
| Sep 13, 9:34 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 38 min |
| Sep 13, 9:53 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth, Somerset | 52 min |
| Sep 13, 10:03 PM EDT | Special Marine Warning | PHI | 57 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.