Alert archive / New Jersey / Flash Flood Warnings in 2004
Flash Flood Warning 70, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 11, 2004, 7:58 PM EDT for Mercer County, New Jersey. It was in force for 2 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
- Aug 11, 2004, 7:58 PM EDT (23:58 UTC)
- Expired
- Aug 11, 2004, 10:00 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Mercer County, NJ
The radar
The Philadelphia radar (KDIX), 44 km from the middle of the area, began a volume at 00:01 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, 12.0 hours before the alert went out and 171 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
- 1077 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS51 KPHI 120003 FFWPHI NJC021-120200- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 758 PM EDT WED AUG 11 2004 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... MERCER COUNTY IN CENTRAL NEW JERSEY * UNTIL 1000 PM EDT * AT 756 PM EDT...HEAVY RAIN FROM THUNDERSTORMS HAS BROUGHT STREAMS AND CREEKS TO NEAR BANKFUL IN THE CLARKSVILLE AREA. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO MOVE ACROSS THE COUNTY DURING THE NEXT HOUR OR TWO. THIS MAY CAUSE ROADWAY FLOODING AND FLOODING IN AREAS OF POOR DRAINAGE. IN ADDITION...SMALL STREAMS AND CREEKS MAY REACH OR EXCEED BANKFUL FOR A SHORT PERIOD OF TIME. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. 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. LAT...LON 4029 7486 4014 7472 4023 7452 4036 7468 $$ RPW
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 12:46 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 59 min |
| Aug 11, 1:00 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset | 60 min |
| Aug 11, 1:44 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 46 min |
| Aug 11, 2:02 PM EDT | Severe Thunderstorm Warning | PHI | Somerset | 28 min |
| Aug 11, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Somerset | 78 min |
| Aug 11, 4:52 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 23 min |
| Aug 11, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 53 min |
| Aug 11, 5:53 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex | 67 min |
| Aug 11, 6:19 PM EDT | Severe Thunderstorm Warning | PHI | Mercer | 41 min |
| Aug 11, 6:32 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset | 73 min |
| Aug 11, 6:47 PM EDT | Flash Flood Warning | PHI | Middlesex | 118 min |
| Aug 11, 7:08 PM EDT | Severe Thunderstorm Warning | PHI | Mercer | 32 min |
| Aug 11, 7:45 PM EDT | Flash Flood Warning | PHI | Monmouth | 2 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.