Alert archive / New Jersey / Flash Flood Warnings in 2018
Flash Flood Warning 55, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 11, 2018, 7:16 AM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 4 hr. 2 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
- Aug 11, 2018, 7:16 AM EDT (11:16 UTC)
- Expired
- Aug 11, 2018, 10:51 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Middlesex County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 11:15 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 8:19 AM EDT | FLOOD | 1 Nnw Melrose, NJ | GARDEN STATE PARKWAY NORTHBOUND CLOSED AT EXIT 125 - CHEVALIER AVENUE. 2 RIGHT LANES BLOCKED DUE TO FLOODING. |
| Aug 11, 8:30 AM EDT | FLOOD | 1 Nnw Melrose, NJ | GARDEN STATE PARKWAY NORTHBOUND CLOSED AT EXIT 125 - CHEVALIER AVENUE. 2 RIGHT LANES BLOCKED DUE TO FLOODING. |
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 00:00Z, 11.3 hours before the alert went out and 134 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
- 155 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1448 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
392
WGUS51 KPHI 111116
FFWPHI
NJC023-035-111515-
/O.NEW.KPHI.FF.W.0055.180811T1116Z-180811T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
716 AM EDT SAT AUG 11 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Southeastern Somerset County in northern New Jersey...
Northeastern Middlesex County in northern New Jersey...
* Until 1115 AM EDT.
* At 715 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen. Flash flooding is expected to begin shortly in the
areas of heaviest rain.
* Some locations that could experience flooding include...
New Brunswick, Perth Amboy, Somerset, Edison, East Brunswick,
Middlesex, Bound Brook, Manville, Millstone, Colonia, Martinsville,
Society Hill, North Brunswick Township, Woodbridge, South
Plainfield, North Plainfield, Highland Park, Metuchen, Dunellen and
Milltown.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area early this morning.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
&&
LAT...LON 4050 7426 4050 7428 4048 7427 4045 7451
4048 7458 4064 7459 4066 7453 4065 7451
4067 7448 4066 7445 4066 7441 4063 7442
4060 7446 4060 7426 4052 7425
$$
JRK3 follow-up statements
731
WGUS71 KPHI 111153
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
753 AM EDT SAT AUG 11 2018
NJC023-035-111515-
/O.CON.KPHI.FF.W.0055.000000T0000Z-180811T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Somerset NJ-Middlesex NJ-
753 AM EDT SAT AUG 11 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT FOR
SOUTHEASTERN SOMERSET AND NORTHEASTERN MIDDLESEX COUNTIES...
At 750 AM EDT, emergency management reported flash flooding in North
Plainfield with two water rescues along Route 22. Up to 2.5 inches
of rain have already fallen. Flash flooding is already occurring.
Some locations that could experience flooding include...
New Brunswick, Perth Amboy, Somerset, Edison, East Brunswick,
Middlesex, Bound Brook, Manville, Millstone, Colonia, Martinsville,
Society Hill, North Brunswick Township, Woodbridge, South Plainfield,
North Plainfield, Highland Park, Metuchen, Dunellen and Milltown.
Additional rainfall amounts of less than 1 inch are possible in the
warned area through mid morning.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 4050 7426 4050 7428 4048 7427 4045 7451
4048 7458 4064 7459 4066 7453 4065 7451
4067 7448 4066 7445 4066 7441 4063 7442
4060 7446 4060 7426 4052 7425
$$
JRK398
WGUS71 KPHI 111304
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
904 AM EDT SAT AUG 11 2018
NJC023-035-111515-
/O.CON.KPHI.FF.W.0055.000000T0000Z-180811T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Somerset NJ-Middlesex NJ-
904 AM EDT SAT AUG 11 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT FOR
EAST CENTRAL SOMERSET AND NORTHEASTERN MIDDLESEX COUNTIES...
At 856 AM EDT, emergency management reported flash flooding that
occurred just after 7 AM in North Plainfield with multiple water
rescues along Route 22. Several creeks and streams continue to
respond to the excess runoff from the earlier heavy rain. Green
Brook near Plainfield continues to rise quickly and was approaching
flood stage of 8.0 feet at 850 AM. Flooding along Green Brook will
occur shortly.
Some locations that could experience flooding include...
New Brunswick, Perth Amboy, Somerset, Edison, Middlesex, Bound Brook,
Manville, Millstone, Colonia, Martinsville, Society Hill, Woodbridge,
South Plainfield, North Plainfield, Highland Park, Metuchen,
Dunellen, Watchung, South Bound Brook and Iselin.
Up to 2.5 inches of rain have already fallen. An additional brief
heavy downpour is possible before 11 AM if the showers that are
currently over eastern Pennsylvania move back into the warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 4050 7426 4050 7428 4048 7427 4047 7435
4050 7436 4049 7447 4050 7452 4048 7458
4064 7459 4066 7453 4065 7451 4067 7448
4066 7445 4066 7441 4063 7442 4060 7446
4060 7426 4052 7425
$$
JRK781
WGUS71 KPHI 111451
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1051 AM EDT SAT AUG 11 2018
NJC023-035-111459-
/O.CAN.KPHI.FF.W.0055.000000T0000Z-180811T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Somerset NJ-Middlesex NJ-
1051 AM EDT SAT AUG 11 2018
...THE FLASH FLOOD WARNING FOR EAST CENTRAL SOMERSET AND NORTHEASTERN
MIDDLESEX COUNTIES IS CANCELLED...
The heavy rain has ended and flood waters are receding. Flash
flooding is no longer expected to pose a threat to life and
property. However, minor flooding may linger for the next several
hours in poor drainage areas. Please continue to heed any remaining
road closures.
LAT...LON 4050 7426 4050 7428 4048 7427 4047 7435
4050 7436 4049 7447 4050 7452 4048 7458
4064 7459 4066 7453 4065 7451 4067 7448
4066 7445 4066 7441 4063 7442 4060 7446
4060 7426 4052 7425
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 3:24 AM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 9 more | 20 hr |
| Aug 11, 4:26 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more | 24 hr |
| Aug 11, 5:27 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Warren | 4 hr |
| Aug 11, 6:06 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 6 hr |
| Aug 11, 6:31 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 7 hr |
| Aug 11, 10:49 AM EDT | Areal Flood Advisory | PHI | Middlesex, Somerset | 3 hr |
| Aug 11, 11:29 AM EDT | Areal Flood Advisory | PHI | Atlantic | 4 hr |
| Aug 11, 11:46 AM EDT | Special Marine Warning | PHI | 119 min | |
| Aug 11, 11:55 AM EDT | Special Weather Statement | PHI | Burlington | 35 min |
| Aug 11, 12:27 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Ocean | 4 hr |
| Aug 11, 12:39 PM EDT | Special Weather Statement | PHI | Ocean | 36 min |
| Aug 11, 12:55 PM EDT | Special Marine Warning | PHI | 65 min | |
| Aug 11, 1:07 PM EDT | Flash Flood Warning | PHI | Atlantic, Cape May | 4 hr |
| Aug 11, 1:26 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 1:42 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 1:51 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Aug 11, 2:00 PM EDT | Flash Flood Warning | PHI | Warren | 9 hr |
| Aug 11, 2:05 PM EDT | Special Weather Statement | PHI | Cape May | 25 min |
| Aug 11, 2:06 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 3 hr |
| Aug 11, 2:19 PM EDT | Special Marine Warning | PHI | 86 min | |
| Aug 11, 2:20 PM EDT | Areal Flood Advisory | PHI | Cape May, Cumberland | 3 hr |
| Aug 11, 2:30 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Warren | 3 hr |
| Aug 11, 2:46 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 3 hr |
| Aug 11, 2:58 PM EDT | Special Weather Statement | PHI | Cumberland | 47 min |
| Aug 11, 3:06 PM EDT | Flash Flood Warning | PHI | Warren | 4 hr |
| Aug 11, 3:13 PM EDT | Special Weather Statement | PHI | Hunterdon | 47 min |
| Aug 11, 3:23 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex | 3 hr |
| Aug 11, 3:24 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 51 min |
| Aug 11, 3:32 PM EDT | Flash Flood Warning | PHI | Atlantic | 3 hr |
| Aug 11, 3:47 PM EDT | Flash Flood Warning | PHI | Morris | 3 hr |
| Aug 11, 4:11 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 4:28 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 5:00 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 3 hr |
| Aug 11, 5:26 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Warren | 4 hr |
| Aug 11, 5:36 PM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 4 hr |
| Aug 11, 6:11 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 6:12 PM EDT | Flash Flood Warning | PHI | Salem | 3 hr |
| Aug 11, 7:35 PM EDT | Areal Flood Advisory | PHI | Atlantic, Cumberland | 3 hr |
| Aug 11, 7:46 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 4 days |
Nearby
Flash Flood Warnings in New Jersey, 2018Every flash flood warning in 2018
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.