Alert archive / New Jersey / Flash Flood Warnings in 2005

Flash Flood Warning 16, NWS Philadelphia/Mount Holly

July 17, 2005Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 17, 2005, 11:53 PM EDT for Middlesex County, New Jersey. It was in force for 4 hr. 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 17, 2005, 11:53 PM EDT (03:53 UTC)
Expired
Jul 18, 2005, 3:45 AM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 03:53 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 00:00Z, 3.9 hours before the alert went out and 143 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.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2005-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 380 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2005-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
380 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
560 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KPHI 180353
FFWPHI
NJC023-180745-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1153 PM EDT SUN JUL 17 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY

* UNTIL 345 AM EDT

* AT 1141 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH   
FLOODING WAS OCCURRING ALONG THE MANALAPAN BROOK IN THE VICINITY OF 
SPOTSWOOD, JAMESBURG AND HELMETTA. EVACUATIONS OF HOMES IN THE AREA 
WERE OCCURRING...AND SEVERAL ROADS NEAR THE AREA WERE FLOODED. 

AS OF 1130 PM EDT...THE RIVER STAGE AT SPOTSWOOD WAS 20.3 FEET AND 
IT WAS STILL RISING. FLOODING BEGINS AT 19.0 FEET. 

ADDITIONAL RAINFALL AMOUNTS OF UP TO ONE HALF INCH ARE POSSIBLE WITH 
THUNDERSTORMS ADVANCING FROM SOUTHWESTERN MONMOUTH COUNTY TOWARD 
SOUTHEASTERN MIDDLESEX COUNTY WHERE THE MANALPAN BROOK RUNS. IF 
THESE THUNDERSTORMS MISS THE AREA...THE STAGE AT SPOTSWOOD LIKELY 
WOULD CREST BETWEEN 20.5 FEET AND 21.0 FEET AT AROUND 200 AM EDT 
MONDAY. IF THE THUNDERSTORMS MOVE OVER THE AREA...FLOODING WOULD BE 
EXACERBATED WITH A POSSIBLE CREST ABOVE 21.0 FEET LATER DURING THE 
PREDAWN HOURS. 

PLEASE LISTEN TO LOCAL AND COUNTY OFFICIALS AND ACT QUICKLY IF THEY 
TELL YOU TO EVACUATE. THIS IS A SERIOUS FLOODING SITUATION.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. AGAIN, IF FLASH FLOODING IS OBSERVED, ACT 
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT 
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. TURN AROUND, DONT DROWN.

LAT...LON 4026 7445 4043 7425 4047 7434 4032 7459

$$

MPD

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 3:17 PM EDTFlash Flood WarningPHIOcean3 hr

Nearby

Flash Flood Warnings in New Jersey, 2005Every flash flood warning in 2005

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.