Alert archive / New Jersey / Flash Flood Warnings in 2024
Flash Flood Warning 62, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 18, 2024, 5:38 PM EDT for Sussex County, Warren County, New Jersey. It was in force for 4 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
- Aug 18, 2024, 5:38 PM EDT (21:38 UTC)
- Expired
- Aug 18, 2024, 9:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Sussex County, NJ, Warren County, NJ
The radar
The Philadelphia radar (KDIX), 137 km from the middle of the area, began a volume at 21:38 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, 9.6 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
- 109 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 582 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 187 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
303
WGUS51 KPHI 182138
FFWPHI
NJC037-041-190145-
/O.NEW.KPHI.FF.W.0062.240818T2138Z-240819T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
538 PM EDT Sun Aug 18 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Sussex County in northwestern New Jersey...
Northeastern Warren County in northwestern New Jersey...
* Until 945 PM EDT.
* At 538 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.5 inches of
rain have fallen. Additional rainfall amounts of 1 to 3 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 may experience flash flooding include...
Newton, Montague, Hopatcong, Franklin, Hamburg, Ogdensburg,
Sussex, Branchville, Andover, Pellettown, Crandon Lakes and Lake
Mohawk.
This includes Interstate 80 in New Jersey between mile markers 14
and 21.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
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 4118 7488 4122 7486 4124 7486 4129 7483
4135 7475 4136 7469 4120 7437 4098 7463
4096 7466 4090 7487 4093 7494 4105 7502
4109 7497 4109 7499 4111 7498 4114 7492
FLASH FLOOD...RADAR INDICATED
$$
Hoeflich2 follow-up statements
669
WGUS71 KPHI 190042
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
842 PM EDT Sun Aug 18 2024
NJC037-041-190145-
/O.CON.KPHI.FF.W.0062.000000T0000Z-240819T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-Warren NJ-
842 PM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT THIS
EVENING FOR SOUTHERN SUSSEX AND NORTHEASTERN WARREN COUNTIES...
At 842 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1.5 and 3 inches of rain have
fallen. Additional rainfall amounts of 0.5 to 1.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Newton, Hopatcong, Franklin, Ogdensburg, Branchville, Andover,
Greendell, Five Points, Crandon Lakes, Lake Mohawk,
Allamuchy-Panther Valley and Pellettown.
This includes Interstate 80 in New Jersey between mile markers 14
and 21.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4115 7487 4120 7473 4109 7450 4098 7463
4096 7466 4090 7487 4093 7494 4105 7502
4108 7498 4108 7497 4109 7497 4112 7491
FLASH FLOOD...RADAR INDICATED
$$
Hoeflich264
WGUS71 KPHI 190135
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
935 PM EDT Sun Aug 18 2024
NJC037-041-190145-
/O.EXP.KPHI.FF.W.0062.000000T0000Z-240819T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex NJ-Warren NJ-
935 PM EDT Sun Aug 18 2024
...FLASH FLOOD WARNING WILL EXPIRE AT 945 PM EDT THIS EVENING FOR
SOUTHERN SUSSEX AND NORTHEASTERN WARREN COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flood Watch remains in effect until 200 AM EDT for portions of
northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4115 7487 4120 7473 4109 7450 4098 7463
4096 7466 4090 7487 4093 7494 4105 7502
4108 7498 4108 7497 4109 7497 4112 7491
$$
HoeflichThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 3:09 AM EDT | Flash Flood Warning | PHI | Burlington, Camden | 93 min |
| Aug 18, 4:41 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Mercer | 2 hr |
| Aug 18, 2:17 PM EDT | Special Marine Warning | PHI | 58 min | |
| Aug 18, 2:42 PM EDT | Special Marine Warning | PHI | 93 min | |
| Aug 18, 3:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 18, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 41 min |
| Aug 18, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 34 min |
| Aug 18, 4:56 PM EDT | Flash Flood Warning | PHI | Warren | 6 hr |
| Aug 18, 5:10 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Warren | 29 min |
| Aug 18, 5:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Aug 18, 5:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 6 hr |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 43 min |
| Aug 18, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth | 58 min |
| Aug 18, 5:51 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 24 min |
| Aug 18, 5:59 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex | 18 min |
| Aug 18, 6:01 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Aug 18, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 66 min |
| Aug 18, 6:36 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 5 hr |
Nearby
Flash Flood Warnings in New Jersey, 2024Every flash flood warning in 2024
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.