Alert archive / New Jersey / Flash Flood Warnings in 2016
Flash Flood Warning 25, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 30, 2016, 3:58 PM EDT for Mercer County, Middlesex County, Somerset County, New Jersey. It was in force for 7 hr. 6 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
- Jul 30, 2016, 3:58 PM EDT (19:58 UTC)
- Expired
- Jul 30, 2016, 10:30 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mercer County, NJ, Middlesex County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 48 km from the middle of the area, began a volume at 19:59 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 |
|---|---|---|---|
| Jul 30, 4:04 PM EDT | FLASH FLOOD | West Windsor Twp, NJ | MULTIPLE ROADS REPORTED TO BE FLOODED AND IMPASSABLE. FLOODING REPORTED ON US 1... COUNTY ROUTE 571... WASHINGTON ROAD AND ALEXANDER ROAD. WATER RESCUES REPORTED TO BE ONGOING IN THE PRINCETON AREA. |
| Jul 30, 4:20 PM EDT | FLASH FLOOD | Plainsboro, NJ | FLASH FLOODING OCCURING IN PLAINSBORO. WATER REPORTED UP TO THE BUMPERS OF CARS. |
| Jul 30, 4:20 PM EDT | FLASH FLOOD | Plainsboro, NJ | FLASH FLOODING OCCURRING IN PLAINSBORO. WATER REPORTED UP TO THE BUMPERS OF CARS. |
| Jul 30, 4:30 PM EDT | FLASH FLOOD | Princeton Junction, NJ | THE PRINCETON JUNCTION TRAIN STATION INUNDATED BY FLOOD WATERS. THE WATER IS UP TO THE TOP OF THE TUNNEL. |
| Jul 30, 5:30 PM EDT | HEAVY RAIN 5.75 | Plainsboro, NJ | |
| Jul 30, 6:25 PM EDT | FLASH FLOOD | West Windsor Twp, NJ | WEST WINDSOR TOWNSHIP DECLARED A STATE OF EMERGENCY DUE TO WIDESPREAD FLASH FLOODING. THIS INCLUDED DOZENS OF DISABLED VEHICLES REQUIRING WATER RESCUES. |
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, 8.0 hours before the alert went out and 159 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
- 176 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 858 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
168
WGUS51 KPHI 301958
FFWPHI
NJC021-023-035-310000-
/O.NEW.KPHI.FF.W.0025.160730T1958Z-160731T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
358 PM EDT SAT JUL 30 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL MERCER COUNTY IN CENTRAL NEW JERSEY...
SOUTH CENTRAL SOMERSET COUNTY IN NORTHERN NEW JERSEY...
WEST CENTRAL MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 800 PM EDT
* AT 355 PM EDT...DOPPLER RADAR INDICATED A CLUSTER OF THUNDERSTORMS
PRODUCING HEAVY RAIN ACROSS PORTIONS OF THE WARNED AREA. UP TO TWO
INCHES OF RAIN HAVE ALREADY FALLEN. UP TO FOUR INCHES IS POSSIBLE.
BECAUSE THIS AMOUNT OF RAIN WILL FALL IN A SHORT PERIOD OF TIME,
FLASH FLOODING IS LIKELY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SOUTH BRUNSWICK...EWING...PRINCETON...ROCKY HILL...KENDALL PARK...
PLAINSBORO CENTER...LAWRENCEVILLE...EDINBURG...KINGSTON...
PRINCETON MEADOWS...MERCERVILLE-HAMILTON SQUARE...
MONMOUTH JUNCTION...HEATHCOTE...
PRINCETON JUNCTION AND PRINCETON NORTH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU
THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER
THAT YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE.
&&
LAT...LON 4041 7452 4023 7463 4026 7476 4043 7465
$$
KRUZDLO3 follow-up statements
871 WGUS71 KPHI 302146 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 546 PM EDT SAT JUL 30 2016 NJC021-023-035-310000- /O.CON.KPHI.FF.W.0025.000000T0000Z-160731T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER NJ-SOMERSET NJ-MIDDLESEX NJ- 546 PM EDT SAT JUL 30 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR CENTRAL MERCER...SOUTH CENTRAL SOMERSET AND WEST CENTRAL MIDDLESEX COUNTIES... AT 539 PM EDT...IT WAS STILL RAINING ACROSS THE WARNED AREA, BUT THE INTENSITY WAS SLOWLY DIMINISHING. CREEKS ARE RUNNING HIGH, ROADS HAVE BEEN CLOSED, AND WATER RESCUES HAVE BEEN CONDUCTED. UP TO FIVE INCHES OF RAIN HAVE FALLEN THE LAST FEW HOURS. THE WORST FLOODING HAS BEEN ALONG THE ROUTE ONE CORRIDOR FROM PRINCETON TO PLAINSBORO. THIS IS A DANGEROUS SITUATION. DO NOT GO AROUND ROAD BARRIERS. MOVE TO HIGHER GROUND IF NEEDED. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... SOUTH BRUNSWICK...EWING...PRINCETON...ROCKY HILL...KENDALL PARK... PLAINSBORO CENTER...LAWRENCEVILLE...EDINBURG...KINGSTON... PRINCETON MEADOWS...MERCERVILLE-HAMILTON SQUARE... MONMOUTH JUNCTION...HEATHCOTE... PRINCETON JUNCTION AND PRINCETON NORTH. PRECAUTIONARY/PREPAREDNESS ACTIONS... DRIVING INTO FLOOD WATERS COULD PUT YOUR LIFE AT RISK AND COST YOU THOUSANDS OF DOLLARS IN VEHICLE REPAIRS. FLOOD WATERS MAY BE DEEPER THAT YOU THINK. TURN AROUND AND FIND AN ALTERNATE ROUTE. TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4041 7452 4023 7463 4026 7476 4043 7465 $$ KRUZDLO
239
WGUS51 KPHI 302358
FFWPHI
NJC021-023-035-310230-
/O.EXT.KPHI.FF.W.0025.000000T0000Z-160731T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
758 PM EDT SAT JUL 30 2016
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
CENTRAL MERCER COUNTY IN CENTRAL NEW JERSEY...
SOUTH CENTRAL SOMERSET COUNTY IN NORTHERN NEW JERSEY...
WEST CENTRAL MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 1030 PM EDT
* AT 750 PM EDT...RAIN WAS STILL FALLING ACROSS THE WARNED AREA
ALTHOUGH RAIN RATES HAVE IMPROVED AND ARE NOW LESS THAN AN INCH
PER HOUR. CREEKS CONTINUE TO RUN HIGH, ROADS HAVE BEEN CLOSED, AND
WATER RESCUES HAVE BEEN CONDUCTED. UP TO SIX INCHES OF RAIN HAVE
FALLEN SINCE 300 PM. THE WORST FLOODING REPORTED HAS BEEN ALONG
THE ROUTE ONE CORRIDOR FROM PRINCETON TO PLAINSBORO. UNTIL THE
WATER HAS SUBSIDED, THIS REMAINS A DANGEROUS SITUATION. DO NOT GO
AROUND ROAD BARRIERS. MOVE TO HIGHER GROUND. THE WEST WINDSOR
POLICE DEPARTMENT HAS DECLARED A STATE OF EMERGENCY FOR WEST
WINDSOR TOWNSHIP.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SOUTH BRUNSWICK...EWING...PRINCETON...ROCKY HILL...KENDALL PARK...
PLAINSBORO CENTER...LAWRENCEVILLE...EDINBURG...KINGSTON...
PRINCETON MEADOWS...MERCERVILLE-HAMILTON SQUARE...
MONMOUTH JUNCTION...HEATHCOTE...
PRINCETON JUNCTION AND PRINCETON NORTH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 4041 7452 4023 7463 4026 7476 4043 7465
$$
KRUZDLO298 WGUS71 KPHI 310225 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1025 PM EDT SAT JUL 30 2016 NJC021-023-035-310233- /O.EXP.KPHI.FF.W.0025.000000T0000Z-160731T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER NJ-SOMERSET NJ-MIDDLESEX NJ- 1025 PM EDT SAT JUL 30 2016 ...THE FLASH FLOOD WARNING FOR CENTRAL MERCER...SOUTH CENTRAL SOMERSET AND WEST CENTRAL MIDDLESEX COUNTIES WILL EXPIRE AT 1030 PM EDT... WATER IS NO LONGER RISING RAPIDLY. THE FLASH FLOOD WARNING HAS BEEN REPLACED BY A FLOOD WARNING WHICH IS IN EFFECT UNTIL 215 AM. LAT...LON 4041 7452 4023 7463 4026 7476 4043 7465 $$ KRUZDLO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 1:55 PM EDT | Special Weather Statement | PHI | Hunterdon | 50 min |
| Jul 30, 2:34 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth | 4 hr |
| Jul 30, 2:40 PM EDT | Special Weather Statement | PHI | Morris | 35 min |
| Jul 30, 2:59 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 4 hr |
| Jul 30, 3:03 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 47 min |
| Jul 30, 3:06 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Somerset | 4 hr |
| Jul 30, 3:34 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex | 4 hr |
| Jul 30, 3:45 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex | 4 hr |
| Jul 30, 3:49 PM EDT | Special Weather Statement | PHI | Mercer, Middlesex | 26 min |
| Jul 30, 4:37 PM EDT | Flash Flood Warning | PHI | Middlesex | 6 hr |
| Jul 30, 6:26 PM EDT | Flash Flood Warning | PHI | Mercer | 4 hr |
Nearby
Flash Flood Warnings in New Jersey, 2016Every flash flood warning in 2016
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.