Alert archive / New Jersey / Flash Flood Warnings in 2009
Flash Flood Warning 25, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 31, 2009, 4:56 PM EDT for 6 counties in New Jersey. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2009, 4:56 PM EDT (20:56 UTC)
- Expired
- Jul 31, 2009, 6:50 PM EDT
- In force
- 114 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 20:58 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.9 hours before the alert went out and 144 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
- 48 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1022 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 312056
FFWPHI
NJC019-021-023-025-027-035-010100-
/O.NEW.KPHI.FF.W.0025.090731T2056Z-090801T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
456 PM EDT FRI JUL 31 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
MERCER COUNTY IN CENTRAL NEW JERSEY...
THIS INCLUDES THE CITY OF TRENTON...
WESTERN MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITIES OF...PERTH AMBOY...NEW BRUNSWICK...
SOUTHEASTERN MORRIS COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF MORRISTOWN...
SOMERSET COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF SOMERVILLE...
HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
* UNTIL 900 PM EDT
* AT 453 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
AN AREA OF EXCESSIVE RAINFALL OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MANVILLE...
MILLINGTON...MARTINSVILLE...BRIDGEWATER...BASKING RIDGE...WHITE
HOUSE STATION...PEAPACK AND GLADSTONE...PARSIPPANY...MIDDLESEX...
MADISON...LEBANON...FAR HILLS...EAST HANOVER...COLONIA...CARTERET
AND BOUND BROOK
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR BY AUTOMOBILE.
&&
LAT...LON 4007 7456 4013 7460 4017 7468 4015 7472
4025 7484 4040 7497 4042 7506 4054 7507
4094 7428 4090 7427 4089 7433 4086 7431
4074 7436 4067 7445 4066 7440 4059 7444
4059 7420 4047 7427 4046 7412 4043 7408
$$
KRUZDLO1 follow-up statement
000
WGUS71 KPHI 312250
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
650 PM EDT FRI JUL 31 2009
NJC019-021-023-025-027-035-312300-
/O.CAN.KPHI.FF.W.0025.000000T0000Z-090801T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORRIS NJ-HUNTERDON NJ-SOMERSET NJ-MERCER NJ-MIDDLESEX NJ-MONMOUTH
NJ-
650 PM EDT FRI JUL 31 2009
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WESTERN MONMOUTH...
MIDDLESEX...MERCER...SOMERSET...HUNTERDON AND SOUTHEASTERN MORRIS
COUNTIES...
LAT...LON 4007 7456 4013 7460 4017 7468 4015 7472
4025 7484 4040 7497 4042 7506 4054 7507
4094 7428 4090 7427 4089 7433 4086 7431
4074 7436 4067 7445 4066 7440 4059 7444
4059 7420 4047 7427 4046 7412 4043 7408
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 2:13 PM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Jul 31, 2:36 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Sussex, Warren | 4 hr |
| Jul 31, 4:03 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 57 min |
| Jul 31, 4:08 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 3 hr |
| Jul 31, 4:23 PM EDT | Special Marine Warning | PHI | 67 min | |
| Jul 31, 4:31 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Salem | 59 min |
| Jul 31, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 96 min |
| Jul 31, 5:07 PM EDT | Flash Flood Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 3 hr |
| Jul 31, 5:10 PM EDT | Tornado Warning | PHI | Burlington, Ocean | 21 min |
| Jul 31, 5:14 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 31, 5:15 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Ocean | 60 min |
| Jul 31, 5:16 PM EDT | Special Marine Warning | PHI | 119 min | |
| Jul 31, 5:31 PM EDT | Flash Flood Warning | PHI | Burlington, Monmouth, Ocean | 4 hr |
| Jul 31, 5:48 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean | 3 hr |
Nearby
Flash Flood Warnings in New Jersey, 2009Every flash flood warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.