Alert archive / New Jersey / Flash Flood Warnings in 2018
Flash Flood Warning 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at May 27, 2018, 4:39 AM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 4 hr. 8 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
- May 27, 2018, 4:39 AM EDT (08:39 UTC)
- Expired
- May 27, 2018, 8:45 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), 62 km from the middle of the area, began a volume at 08:42 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 |
|---|---|---|---|
| May 27, 6:30 AM EDT | FLASH FLOOD | New Brunswick, NJ | FLOODING ON US 1 SB SOUTH OF NJ 18. RAMP CLOSED. TIME ESTIMATED FROM RADAR. |
| May 27, 6:30 AM EDT | FLASH FLOOD | North Brunswick, NJ | US 1 SB RAMP CLOSED DUE TO FLOODING AT RYDERS LANE. |
| May 27, 7:30 AM EDT | FLOOD | New Brunswick, NJ | FLOODING ON US 1 SB SOUTH OF NJ 18. RAMP CLOSED. TIME ESTIMATED FROM RADAR. |
| May 27, 7:30 AM EDT | FLOOD | North Brunswick, NJ | US 1 SB RAMP CLOSED DUE TO FLOODING AT RYDERS LANE. |
| May 27, 7:40 AM EDT | FLASH FLOOD | Franklin Twp, NJ | BLACKWELLS MILLS ROAD CLOSED BETWEEN SOUTH MIDDLEBUSH AND VANCLEFF. |
| May 27, 7:40 AM EDT | FLASH FLOOD | Franklin Twp, NJ | CANAL ROAD CLOSED BETWEEN ROUTE 518 AND COPERMINE ROAD. |
| May 27, 7:40 AM EDT | FLASH FLOOD | Franklin Twp, NJ | FOXWOOD DRIVE CLOSED BETWEEN WINSTON DRIVE AND HUNT ROAD. |
| May 27, 7:40 AM EDT | FLASH FLOOD | Franklin Twp, NJ | SOUTH MIDDLEBUSH ROAD CLOSED BETWEEN BENNETTS LANE AND HILL TOP. |
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, 8.7 hours before the alert went out and 141 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
- 861 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1209 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted.
608
WGUS51 KPHI 270839
FFWPHI
NJC023-035-271245-
/O.NEW.KPHI.FF.W.0004.180527T0839Z-180527T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
439 AM EDT SUN MAY 27 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Southeastern Somerset County in northern New Jersey...
Northwestern Middlesex County in northern New Jersey...
* Until 845 AM EDT.
* At 438 AM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Up to
two inches of rain have already fallen with most of it fallen
within the past hour. Flash flooding is expected to begin shortly
in the areas of heaviest rain.
* Some locations that could experience flooding include...
New Brunswick, Somerset, Edison, North Brunswick, Middlesex, Bound
Brook, Manville, Millstone, Society Hill, North Brunswick Township,
Kendall Park, South Plainfield, Highland Park, Metuchen, Dunellen,
Milltown and South Bound Brook.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
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 4052 7437 4045 7445 4043 7451 4043 7458
4050 7461 4060 7453 4060 7434
$$
JRK2 follow-up statements
210
WGUS71 KPHI 271055
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
655 AM EDT SUN MAY 27 2018
NJC023-035-271245-
/O.CON.KPHI.FF.W.0004.000000T0000Z-180527T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Somerset NJ-Middlesex NJ-
655 AM EDT SUN MAY 27 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 AM EDT FOR
SOUTHEASTERN SOMERSET AND NORTHWESTERN MIDDLESEX COUNTIES...
At 653 AM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain over the warned area. Two to
three inches of rain have already fallen. Flash flooding may be
occurring or beginning shortly. Several area streams, including on
the Middle Brook and Green Brook are rising sharply in response to
the excess runoff.
Some locations that could experience flooding include...
New Brunswick, Somerset, Edison, North Brunswick, Middlesex, Bound
Brook, Manville, Millstone, Society Hill, North Brunswick Township,
Kendall Park, South Plainfield, Highland Park, Metuchen, Dunellen,
Milltown and South Bound Brook.
Additional rainfall amounts of one half inch are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
Please report flooding to your local law enforcement agency when you
can do so safely.
&&
LAT...LON 4052 7437 4045 7445 4043 7451 4043 7458
4050 7461 4060 7453 4060 7434
$$
JRK230
WGUS71 KPHI 271242
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
842 AM EDT SUN MAY 27 2018
NJC023-035-271250-
/O.EXP.KPHI.FF.W.0004.000000T0000Z-180527T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Somerset NJ-Middlesex NJ-
842 AM EDT SUN MAY 27 2018
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SOMERSET AND NORTHWESTERN
MIDDLESEX COUNTIES WILL EXPIRE AT 845 AM EDT...
The Flash Flood Warning has been converted to a Flood Warning.
Runoff and flooding will continue throughout the morning, but the
rapid rises the area experienced earlier has eased. A widespread one
to three inches fell in a short period of time earlier this morning.
More rain is expected throughout the morning, but it is not expected
to be as intense. Creeks and streams, and rivers, like Middle Brook
and Green Brook, have risen and will continue to do so as the rain
continues to runoff.
LAT...LON 4052 7437 4045 7445 4043 7451 4043 7458
4050 7461 4060 7453 4060 7434
$$
KruzdloThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 11:38 PM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 9 more | 23 hr |
| May 27, 1:27 AM EDT | Special Marine Warning | PHI | 2 hr | |
| May 27, 1:46 AM EDT | Special Marine Warning | PHI | 89 min | |
| May 27, 1:58 AM EDT | Areal Flood Advisory | PHI | Monmouth | 4 hr |
| May 27, 2:13 AM EDT | Areal Flood Advisory | PHI | Morris, Warren | 4 hr |
| May 27, 4:13 AM EDT | Areal Flood Advisory | PHI | Middlesex, Somerset | 4 hr |
| May 27, 4:28 AM EDT | Flash Flood Warning | PHI | Monmouth | 4 hr |
| May 27, 5:27 AM EDT | Areal Flood Advisory | PHI | Hunterdon | 4 hr |
| May 27, 5:35 AM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Monmouth | 4 hr |
| May 27, 5:43 AM EDT | Flash Flood Warning | PHI | Monmouth | 4 hr |
| May 27, 6:12 AM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Somerset | 4 hr |
| May 27, 6:33 AM EDT | Flash Flood Warning | PHI | Hunterdon | 4 hr |
| May 27, 7:30 AM EDT | Flash Flood Warning | PHI | Mercer | 4 hr |
| May 27, 8:25 AM EDT | Areal Flood Warning | PHI | Monmouth | 7 hr |
| May 27, 8:40 AM EDT | Areal Flood Warning | PHI | Middlesex, Somerset | 4 hr |
| May 27, 9:05 AM EDT | River Flood Warning | PHI | Mercer | 13 hr |
| May 27, 9:17 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer, Monmouth, Ocean | 3 hr |
| May 27, 10:02 AM EDT | Areal Flood Warning | PHI | Monmouth | 6 hr |
| May 27, 10:19 AM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 8 hr |
| May 27, 10:27 AM EDT | Areal Flood Warning | PHI | Hunterdon | 8 hr |
| May 27, 11:18 AM EDT | Areal Flood Warning | PHI | Mercer | 7 hr |
| May 27, 3:10 PM EDT | River Flood Warning | PHI | Somerset | 46 hr |
| May 27, 3:22 PM EDT | Coastal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more | 12 hr |
| May 27, 3:44 PM EDT | Areal Flood Warning | PHI | Monmouth | 16 hr |
| May 27, 6:07 PM EDT | Areal Flood Warning | PHI | Mercer, Middlesex, Somerset | 4 hr |
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.