Alert archive / New Jersey / Flash Flood Warnings in 2023
Flash Flood Warning 16, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 26, 2023, 7:07 PM EDT for 4 counties in New Jersey. It was in force for 5 hr. 15 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
- Jun 26, 2023, 7:07 PM EDT (23:07 UTC)
- Expired
- Jun 27, 2023, 12:00 AM EDT
- In force
- 5 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Morris County, NJ, Sussex County, NJ, Warren County, NJ
The radar
The Philadelphia radar (KDIX), 99 km from the middle of the area, began a volume at 23:07 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 |
|---|---|---|---|
| Jun 26, 7:15 PM EDT | FLOOD | 2 Nne Three Bridges, NJ | County Route 629 (Pleasant Run Rd.) closed to all vehicular traffic due to heavy flooding in the area. The closure is between Rt. 523 and Cole Road Time given in report. |
| Jun 26, 7:15 PM EDT | FLOOD | 2 Nne Three Bridges, NJ | County Route 629 (Pleasant Run Rd.) closed to all vehicular traffic due to heavy flooding in the area. The closure is between Rt. 523 and Cole Road Time given in report. |
| Jun 26, 7:26 PM EDT | FLOOD | Netcong, NJ | Flooding on US 46 eastbound East of NJ 183/Netcong Circle (Netcong) 1 Right lane of 2 lanes closed. Time given in report. |
| Jun 26, 7:26 PM EDT | FLOOD | Netcong, NJ | Flooding on US 46 eastbound East of NJ 183/Netcong Circle (Netcong) 1 Right lane of 2 lanes closed. Time given in report. |
| Jun 26, 7:48 PM EDT | RAIN 2.54 | 1 Wsw Brass Castle, NJ | Mesonet station CW5217 Broadway. |
| Jun 26, 7:49 PM EDT | RAIN 2.3 | 1 Sw Hopatcong, NJ | Mesonet station HOPTA 1 SW Hopatcong. |
| Jun 26, 7:49 PM EDT | RAIN 2.95 | 3 Ese Hackettstown, NJ | Mesonet station LNGVL Long Valley. |
| Jun 26, 8:14 PM EDT | FLOOD | 3 Wsw Pleasant Valley, NJ | Flooding on NJ 57 both directions West of CR 643/Asbury Broadway Rd (Franklin Twp) All lanes closed. Time given in report. |
| Jun 26, 8:14 PM EDT | FLOOD | 3 Wsw Pleasant Valley, NJ | Flooding on NJ 57 both directions West of CR 643/Asbury Broadway Rd (Franklin Twp) All lanes closed. Time given in report. |
| Jun 26, 8:26 PM EDT | FLOOD | 1 Sw Netcong, NJ | Flooding on US 46 eastbound West of I-80 (Mount Olive Twp) 1 Right lane of 2 lanes closed. |
| Jun 26, 8:26 PM EDT | FLOOD | 1 Sw Netcong, NJ | Flooding on US 46 eastbound West of I-80 (Mount Olive Twp) 1 Right lane of 2 lanes closed. |
| Jun 26, 8:30 PM EDT | RAIN 2.93 | Glen Gardner, NJ | Report of 2.93 inches of rain in Glen Gardner, NJ. Time given in observation. |
| Jun 26, 8:36 PM EDT | FLOOD | 2 Ne Pohatcong Twp, NJ | Flooding on NJ 173 westbound West of CR 537/Main St/Maple Dr (Greenwich Twp) All lanes closed. Time given in report. |
| Jun 26, 8:36 PM EDT | FLOOD | 2 Ne Pohatcong Twp, NJ | Flooding on NJ 173 westbound West of CR 537/Main St/Maple Dr (Greenwich Twp) All lanes closed. Time given in report. |
| Jun 26, 10:00 PM EDT | RAIN 5.04 | Washington, NJ | Spotter sent in report of 5+ inches of rain since 2:45 PM. |
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, 11.1 hours before the alert went out and 176 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
- 369 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
320
WGUS51 KPHI 262307
FFWPHI
NJC019-027-037-041-270130-
/O.NEW.KPHI.FF.W.0016.230626T2307Z-230627T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
707 PM EDT Mon Jun 26 2023
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
West Central Morris County in northern New Jersey...
Central Hunterdon County in northwestern New Jersey...
Southwestern Sussex County in northwestern New Jersey...
Central Warren County in northwestern New Jersey...
* Until 930 PM EDT.
* At 707 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1 and 2.5 inches of rain have fallen. The expected rainfall rate
is 0.5 to 1 inch in 1 hour. Additional rainfall amounts of 0.5 to
1 inch 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 may experience flash flooding include...
Hopatcong, Hackettstown, Washington, High Bridge, Stanhope,
Netcong, Clinton, Harmony, Oxford, Alpha, Glen Gardner, and
Hampton.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 0 and 19.
Interstate 80 in New Jersey between mile markers 15 and 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4066 7519 4068 7518 4068 7519 4077 7513
4097 7486 4101 7489 4099 7464 4089 7467
4075 7487 4061 7485 4058 7472 4052 7478
4058 7516
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR
$$
Staarmann4 follow-up statements
910
WGUS71 KPHI 262326
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
726 PM EDT Mon Jun 26 2023
NJC019-027-037-041-270130-
/O.CON.KPHI.FF.W.0016.000000T0000Z-230627T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-
726 PM EDT Mon Jun 26 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT THIS
EVENING FOR WEST CENTRAL MORRIS, CENTRAL HUNTERDON, SOUTHWESTERN
SUSSEX, AND CENTRAL WARREN COUNTIES...
At 726 PM EDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 1.5 and 3
inches of rain have fallen. The expected rainfall rate is 0.5 to 1
inch in 1 hour. Additional rainfall amounts of 0.5 to 1 inch are
possible in the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Hopatcong, Hackettstown, Washington, High Bridge, Stanhope,
Netcong, Clinton, Harmony, Oxford, Alpha, Glen Gardner, and
Hampton.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 0 and 19.
Interstate 80 in New Jersey between mile markers 15 and 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4066 7519 4068 7518 4068 7519 4077 7513
4097 7486 4101 7489 4099 7464 4089 7467
4075 7487 4061 7485 4058 7472 4052 7478
4058 7516
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR
$$
Staarmann925
WGUS51 KPHI 270011
FFWPHI
NJC019-027-037-041-270200-
/O.EXT.KPHI.FF.W.0016.000000T0000Z-230627T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
811 PM EDT Mon Jun 26 2023
The National Weather Service in Mount Holly has extended the
* Flash Flood Warning for...
West Central Morris County in northern New Jersey...
Central Hunterdon County in northwestern New Jersey...
Southwestern Sussex County in northwestern New Jersey...
Central Warren County in northwestern New Jersey...
* Until 1000 PM EDT.
* At 811 PM EDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 1.5 and 3.5
inches of rain have fallen. The expected rainfall rate is 0.25 to
0.5 inches in 1 hour. Additional rainfall amounts up to 0.5 inches
are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
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...
Hopatcong, Hackettstown, Washington, High Bridge, Stanhope,
Netcong, Clinton, Harmony, Oxford, Alpha, Glen Gardner, and
Hampton.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 0 and 19.
Interstate 80 in New Jersey between mile markers 15 and 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 4066 7519 4068 7518 4068 7519 4077 7513
4097 7486 4101 7489 4099 7464 4089 7467
4075 7487 4061 7485 4058 7472 4052 7478
4058 7516
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.25-0.5 INCHES IN 1 HOUR
$$
Staarmann301
WGUS51 KPHI 270138
FFWPHI
NJC019-027-037-041-270400-
/O.EXT.KPHI.FF.W.0016.000000T0000Z-230627T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
938 PM EDT Mon Jun 26 2023
The National Weather Service in Mount Holly has extended the
* Flash Flood Warning for...
West Central Morris County in northern New Jersey...
Central Hunterdon County in northwestern New Jersey...
Southwestern Sussex County in northwestern New Jersey...
Central Warren County in northwestern New Jersey...
* Until midnight EDT.
* At 938 PM EDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 2 and 4
inches of rain have fallen. The expected rainfall rate is 0.5 to 1
inch in 1 hour. Additional rainfall amounts of 0.5 to 1 inch are
possible in the warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Hopatcong, Hackettstown, Washington, High Bridge, Stanhope,
Netcong, Clinton, Harmony, Oxford, Alpha, Glen Gardner, and
Hampton.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 0 and 19.
Interstate 80 in New Jersey between mile markers 15 and 28.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4066 7519 4068 7518 4068 7519 4077 7513
4097 7486 4101 7489 4099 7464 4089 7467
4075 7487 4061 7485 4058 7472 4052 7478
4058 7516
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR
$$
Staarmann934
WGUS71 KPHI 270403 RRB
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1203 AM EDT Tue Jun 27 2023
NJC019-027-037-041-270413-
/O.EXP.KPHI.FF.W.0016.000000T0000Z-230627T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Morris NJ-Sussex NJ-Warren NJ-
1203 AM EDT Tue Jun 27 2023
...FLASH FLOOD WARNING HAS EXPIRED FOR WEST CENTRAL MORRIS, CENTRAL
HUNTERDON, SOUTHWESTERN SUSSEX, AND CENTRAL WARREN COUNTIES...
The Flash FLood Warning has been replaced by an Areal Flood Warning,
which is in effect until 700 AM EDT. Additional rainfall amounts of
0.5 to 1.5 inches are possible. Areas of flooding of low lying and
urban areas is possible overnight.
A Flood Watch remains in effect until 300 AM EDT for portions of New
Jersey...and Pennsylvania.
LAT...LON 4066 7519 4068 7518 4068 7519 4077 7513
4097 7486 4101 7489 4099 7464 4089 7467
4075 7487 4061 7485 4058 7472 4052 7478
4058 7516
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 3:19 AM EDT | Small Craft Advisory | PHI | 63 hr | |
| Jun 26, 3:33 AM EDT | Flood Watch | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 23 hr |
| Jun 26, 9:18 AM EDT | Severe Thunderstorm Warning | PHI | Warren | 42 min |
| Jun 26, 9:47 AM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 43 min |
| Jun 26, 10:16 AM EDT | Special Weather Statement | PHI | Camden | 14 min |
| Jun 26, 10:43 AM EDT | Special Weather Statement | PHI | Sussex | 32 min |
| Jun 26, 11:18 AM EDT | Special Weather Statement | PHI | Sussex | 27 min |
| Jun 26, 11:53 AM EDT | Special Weather Statement | PHI | Middlesex | 22 min |
| Jun 26, 11:57 AM EDT | Severe Thunderstorm Warning | PHI | Sussex | 18 min |
| Jun 26, 12:22 PM EDT | Special Weather Statement | PHI | Middlesex | 38 min |
| Jun 26, 2:02 PM EDT | Special Weather Statement | PHI | Hunterdon | 28 min |
| Jun 26, 2:32 PM EDT | Special Marine Warning | PHI | 43 min | |
| Jun 26, 2:40 PM EDT | Special Weather Statement | PHI | Hunterdon | 35 min |
| Jun 26, 2:49 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Warren | 41 min |
| Jun 26, 2:54 PM EDT | Areal Flood Advisory | PHI | Hunterdon | 95 min |
| Jun 26, 2:58 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 47 min |
| Jun 26, 3:01 PM EDT | Special Weather Statement | PHI | Cumberland | 29 min |
| Jun 26, 3:02 PM EDT | Tornado Warning | PHI | Warren | 28 min |
| Jun 26, 3:04 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 41 min |
| Jun 26, 3:17 PM EDT | Tornado Warning | PHI | Hunterdon, Somerset | 28 min |
| Jun 26, 3:21 PM EDT | Special Weather Statement | PHI | Camden | 24 min |
| Jun 26, 3:28 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 32 min |
| Jun 26, 3:40 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Somerset, Sussex | 50 min |
| Jun 26, 3:45 PM EDT | Special Weather Statement | PHI | Burlington | 30 min |
| Jun 26, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 42 min |
| Jun 26, 3:56 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 2 hr |
| Jun 26, 3:59 PM EDT | Special Weather Statement | PHI | Sussex, Warren | 46 min |
| Jun 26, 4:14 PM EDT | Special Weather Statement | PHI | Mercer | 31 min |
| Jun 26, 4:16 PM EDT | Areal Flood Advisory | PHI | Morris, Somerset | 101 min |
| Jun 26, 4:24 PM EDT | Special Weather Statement | PHI | Burlington | 36 min |
| Jun 26, 4:50 PM EDT | Areal Flood Advisory | PHI | Warren | 73 min |
| Jun 26, 4:50 PM EDT | Special Marine Warning | PHI | 40 min | |
| Jun 26, 5:01 PM EDT | Areal Flood Advisory | PHI | Morris | 56 min |
| Jun 26, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 25 min |
| Jun 26, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Morris, Somerset | 39 min |
| Jun 26, 5:22 PM EDT | Special Marine Warning | PHI | 23 min | |
| Jun 26, 5:55 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex | 6 hr |
| Jun 26, 6:00 PM EDT | Areal Flood Advisory | PHI | Warren | 4 hr |
| Jun 26, 6:03 PM EDT | Flash Flood Warning | PHI | Warren | 6 hr |
| Jun 26, 6:08 PM EDT | Special Weather Statement | PHI | Hunterdon | 37 min |
| Jun 26, 6:15 PM EDT | Special Weather Statement | PHI | Salem | 30 min |
| Jun 26, 6:16 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Sussex, Warren | 51 min |
| Jun 26, 6:55 PM EDT | Special Weather Statement | PHI | Hunterdon | 35 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.