Alert archive / New Jersey / Flash Flood Warnings in 2023
Flash Flood Warning 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 26, 2023, 5:55 PM EDT for 4 counties in New Jersey. It was in force for 6 hr. 31 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, 5:55 PM EDT (21:55 UTC)
- Expired
- Jun 27, 2023, 12:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ
The radar
The Philadelphia radar (KDIX), 105 km from the middle of the area, began a volume at 21:57 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, 6:04 PM EDT | FLOOD | 1 Nnw Randolph, NJ | Flooding on NJ 10 westbound CR 670 (Randolph Twp) 2 Right lanes of 3 lanes closed. Time given in report. |
| Jun 26, 6:04 PM EDT | FLOOD | 1 Nnw Randolph, NJ | Flooding on NJ 10 westbound CR 670 (Randolph Twp) 2 Right lanes of 3 lanes closed. Time given in report. |
| Jun 26, 6:09 PM EDT | FLOOD | Raritan, NJ | Flooding on NJ 10 eastbound In the vicinity of US 202 (Morris Plains) 2 Right lanes of 3 lanes closed. Time given in report. |
| Jun 26, 6:09 PM EDT | FLOOD | Raritan, NJ | Flooding on NJ 10 eastbound In the vicinity of US 202 (Morris Plains) 2 Right lanes of 3 lanes closed. Time given in report. |
| Jun 26, 6:13 PM EDT | FLOOD | Dover, NJ | Flooding on US 46 both directions East of NJ 15 (Dover). Time given in report. |
| Jun 26, 6:13 PM EDT | FLOOD | Dover, NJ | Flooding on US 46 both directions East of NJ 15 (Dover). Time given in report. |
| Jun 26, 6:30 PM EDT | FLASH FLOOD | 1 Se Dover, NJ | Report of vehicles stranded on Route 10 in Morris County, NJ. Time given in report. |
| Jun 26, 6:30 PM EDT | FLASH FLOOD | 1 Se Dover, NJ | Report of vehicles stranded on Route 10 in Morris County, NJ. Time given in report. |
| Jun 26, 6:45 PM EDT | RAIN 2 | 1 N Pleasant Plains, NJ | Mesonet station BKRN4 1.3 N Pleasant Plains. |
| Jun 26, 6:45 PM EDT | RAIN 2.32 | 1 Nnw Ironia, NJ | Mesonet station IRON4 Ironia. |
| Jun 26, 7:15 PM EDT | RAIN 3.28 | 2 Wnw Morris Plains, NJ | Mesonet station MSPN4 2.2 SW Denville. |
| Jun 26, 7:25 PM EDT | FLASH FLOOD | 1 Ne Morristown, NJ | The Whippany River gauge at Morristown reached minor flood stage of 6.01 feet. |
| Jun 26, 7:25 PM EDT | FLASH FLOOD | 1 Ne Morristown, NJ | The Whippany River gauge at Morristown reached minor flood stage of 6.01 feet. |
| Jun 26, 7:30 PM EDT | RAIN 2.95 | 2 Se Pottersville, NJ | Mesonet station POTN4 1.8 SE Pottersville. |
| Jun 26, 7:31 PM EDT | FLOOD | 1 Ssw Landing, NJ | Flooding on I-80 eastbound Exit 28 - CR 631/US 46 (Roxbury Twp) 1 Left lane of 3 lanes closed. Time given in report. |
| Jun 26, 7:31 PM EDT | FLOOD | 1 Ssw Landing, NJ | Flooding on I-80 eastbound Exit 28 - CR 631/US 46 (Roxbury Twp) 1 Left lane of 3 lanes closed. Time given in report. |
| Jun 26, 7:40 PM EDT | RAIN 2.06 | 1 E Succasunna, NJ | Mesonet station CW1735 Succasunna. |
| Jun 26, 7:44 PM EDT | RAIN 4.81 | 1 Ese Ironia, NJ | Mesonet station EW6513 Randolph. |
| Jun 26, 7:45 PM EDT | RAIN 2.47 | 1 Ne Landing, NJ | Mesonet station EW4706 Succasunna. |
| Jun 26, 7:45 PM EDT | RAIN 3.07 | 3 Ne Lebanon, NJ | Mesonet station CW5367 Hackettstown. |
| Jun 26, 7:46 PM EDT | RAIN 3.55 | Boonton Twp, NJ | Mesonet station AV873 Boonton. |
| Jun 26, 7:47 PM EDT | RAIN 2.61 | Morris Plains, NJ | Mesonet station FW7545 Morris Plains. |
| Jun 26, 7:47 PM EDT | RAIN 4.11 | 1 Sw Mountain Lakes, NJ | Mesonet station DW1105 Denville. |
| Jun 26, 7:48 PM EDT | RAIN 2.52 | 1 Sw Towaco, NJ | Mesonet station FW2458 Montville. |
| Jun 26, 7:49 PM EDT | RAIN 2.12 | 2 Nne Califon, NJ | Mesonet station DW2180 Califon. |
| 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 2.9 | 1 Sse Long Valley, NJ | Mesonet station LNOFL Long Valley. |
| Jun 26, 8:06 PM EDT | RAIN 4.3 | Parsippany, NJ | Report of 4.3 inches of rain since 4 PM. Time given in observation. |
| Jun 26, 8:09 PM EDT | FLOOD | 2 E Lebanon, NJ | Flooding on US 22 westbound East of Potterstown Rd (Readington Twp) All lanes closed. Time given in report. |
| Jun 26, 8:09 PM EDT | FLOOD | 2 E Lebanon, NJ | Flooding on US 22 westbound East of Potterstown Rd (Readington Twp) All lanes closed. Time given in report. |
| Jun 26, 8:30 PM EDT | RAIN 3.04 | Pompton Plains, NJ | Report sent in via social media. |
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, 9.9 hours before the alert went out and 136 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.
652
WGUS51 KPHI 262155
FFWPHI
NJC019-027-035-037-270200-
/O.NEW.KPHI.FF.W.0013.230626T2155Z-230627T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
555 PM EDT Mon Jun 26 2023
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Morris County in northern New Jersey...
Northern Somerset County in northern New Jersey...
Northeastern Hunterdon County in northwestern New Jersey...
Southeastern Sussex County in northwestern New Jersey...
* Until 1000 PM EDT.
* At 555 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1 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 1.5
inches are possible in the warned area. Flash flooding is ongoing
or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar 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...
Morristown, Somerville, Bridgewater, Dover, Madison, Hopatcong,
Florham Park, East Hanover, Lincoln Park, Manville, Kinnelon, and
Chatham.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 19 and 41.
Interstate 80 in New Jersey between mile markers 27 and 48.
Interstate 287 in New Jersey between mile markers 14 and 53.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4091 7468 4099 7465 4110 7451 4110 7449
4103 7450 4105 7445 4102 7443 4100 7430
4097 7428 4093 7429 4091 7427 4091 7433
4087 7434 4086 7432 4079 7437 4074 7437
4069 7445 4055 7459 4060 7486 4076 7489
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR
$$
Staarmann4 follow-up statements
495
WGUS71 KPHI 262234
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
634 PM EDT Mon Jun 26 2023
NJC019-027-035-037-270200-
/O.CON.KPHI.FF.W.0013.000000T0000Z-230627T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Morris NJ-Somerset NJ-Sussex NJ-
634 PM EDT Mon Jun 26 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS
EVENING FOR MORRIS, NORTHERN SOMERSET, NORTHEASTERN HUNTERDON, AND
SOUTHEASTERN SUSSEX COUNTIES...
At 634 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 1.5 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...
Morristown, Somerville, Bridgewater, Dover, Madison, Hopatcong,
Florham Park, East Hanover, Lincoln Park, Manville, Kinnelon, and
Chatham.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 19 and 38.
Interstate 80 in New Jersey between mile markers 27 and 48.
Interstate 287 in New Jersey between mile markers 15 and 53.
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 4091 7468 4099 7465 4110 7451 4110 7449
4103 7450 4105 7445 4102 7443 4100 7430
4097 7428 4093 7429 4091 7427 4091 7433
4087 7434 4086 7432 4079 7437 4074 7437
4069 7445 4055 7459 4060 7486 4076 7489
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.5-1 INCH IN 1 HOUR
$$
Staarmann814
WGUS71 KPHI 262350
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
750 PM EDT Mon Jun 26 2023
NJC019-027-035-037-270200-
/O.CON.KPHI.FF.W.0013.000000T0000Z-230627T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Morris NJ-Somerset NJ-Sussex NJ-
750 PM EDT Mon Jun 26 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS
EVENING FOR MORRIS, NORTHERN SOMERSET, NORTHEASTERN HUNTERDON, AND
SOUTHEASTERN SUSSEX COUNTIES...
At 750 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 0.25 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...
Morristown, Somerville, Bridgewater, Dover, Madison, Hopatcong,
Florham Park, East Hanover, Lincoln Park, Manville, Kinnelon, and
Chatham.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 19 and 38.
Interstate 80 in New Jersey between mile markers 27 and 48.
Interstate 287 in New Jersey between mile markers 15 and 53.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4091 7468 4099 7465 4110 7451 4110 7449
4103 7450 4105 7445 4102 7443 4100 7430
4097 7428 4093 7429 4091 7427 4091 7433
4087 7434 4086 7432 4079 7437 4074 7437
4069 7445 4055 7459 4060 7486 4076 7489
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.25-0.5 INCHES IN 1 HOUR
$$
Staarmann009
WGUS51 KPHI 270140
FFWPHI
NJC019-027-035-037-270400-
/O.EXT.KPHI.FF.W.0013.000000T0000Z-230627T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
940 PM EDT Mon Jun 26 2023
The National Weather Service in Mount Holly has extended the
* Flash Flood Warning for...
Morris County in northern New Jersey...
Northern Somerset County in northern New Jersey...
Northeastern Hunterdon County in northwestern New Jersey...
Southeastern Sussex County in northwestern New Jersey...
* Until midnight EDT.
* At 940 PM EDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 2.5 and 4.5
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...
Morristown, Somerville, Bridgewater, Dover, Madison, Hopatcong,
Florham Park, East Hanover, Lincoln Park, Manville, Kinnelon, and
Chatham.
This includes the following highways...
Interstate 78 in New Jersey between mile markers 19 and 38.
Interstate 80 in New Jersey between mile markers 27 and 48.
Interstate 287 in New Jersey between mile markers 15 and 53.
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 4091 7468 4099 7465 4110 7451 4110 7449
4103 7450 4105 7445 4102 7443 4100 7430
4097 7428 4093 7429 4091 7427 4091 7433
4087 7434 4086 7432 4079 7437 4074 7437
4069 7445 4055 7459 4060 7486 4076 7489
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.25-0.5 INCHES IN 1 HOUR
$$
Staarmann056
WGUS71 KPHI 270403 RRD
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1203 AM EDT Tue Jun 27 2023
NJC019-027-035-037-270413-
/O.EXP.KPHI.FF.W.0013.000000T0000Z-230627T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Morris NJ-Somerset NJ-Sussex NJ-
1203 AM EDT Tue Jun 27 2023
...FLASH FLOOD WARNING HAS EXPIRED FOR MORRIS, NORTHERN SOMERSET,
NORTHEASTERN HUNTERDON, AND SOUTHEASTERN SUSSEX 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 4091 7468 4099 7465 4110 7451 4110 7449
4103 7450 4105 7445 4102 7443 4100 7430
4097 7428 4093 7429 4091 7427 4091 7433
4087 7434 4086 7432 4079 7437 4074 7437
4069 7445 4055 7459 4060 7486 4076 7489
$$
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, 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 |
| Jun 26, 7:07 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Sussex, Warren | 5 hr |
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.