Alert archive / New Jersey / Flash Flood Warnings in 2004

Flash Flood Warning 30, NWS Philadelphia/Mount Holly

July 23, 2004Hunterdon County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 23, 2004, 3:31 PM EDT for Hunterdon County, New Jersey. It was in force for 119 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 23, 2004, 3:31 PM EDT (19:31 UTC)
Expired
Jul 23, 2004, 5:30 PM EDT
In force
119 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Hunterdon County, NJ

The radar

The Philadelphia radar (KDIX), 81 km from the middle of the area, began a volume at 19:34 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, 7.5 hours before the alert went out and 167 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 12:00Z on 2004-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 78 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2004-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.193958Sfc1 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
78 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1005 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
5 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 231933
FFWPHI
NJC019-232130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
331 PM EDT FRI JUL 23 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY

* UNTIL 530 PM EDT

* AT 328 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  UP TO 3 INCHES OF RAIN HAS FALLEN IN NORTHEASTERN HUNTERDON COUNTY 
  NEAR WHITE HOUSE STATION. RADAR INDICATES ADDITIONAL RAIN IS       
  LIKELY DURING THE NEXT HOUR OR SO.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

LAT...LON 4063 7489 4051 7483 4056 7474 4068 7475

$$

JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 2:32 PM EDTFlash Flood WarningPHIMorris, Somerset118 min
Jul 23, 4:25 PM EDTFlash Flood WarningPHIMorris, Somerset3 hr
Jul 23, 5:01 PM EDTFlash Flood WarningPHIMercer3 hr
Jul 23, 5:25 PM EDTFlash Flood WarningPHIHunterdon2 hr
Jul 23, 7:20 PM EDTFlash Flood WarningPHIHunterdon, Morris, Somerset4 hr

Nearby

Flash Flood Warnings in New Jersey, 2004Every flash flood warning in 2004

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.