Alert archive / New Jersey / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 159, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 11, 2004, 12:46 PM EDT for Morris County, New Jersey. It was in force for 59 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
- Aug 11, 2004, 12:46 PM EDT (16:46 UTC)
- Expired
- Aug 11, 2004, 1:45 PM EDT
- In force
- 59 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Morris County, NJ
The radar
The Philadelphia radar (KDIX), 103 km from the middle of the area, began a volume at 16:49 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, 4.8 hours before the alert went out and 133 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
WUUS51 KPHI 111646
SVRPHI
NJC027-111745-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1245 PM EDT WED AUG 11 2004
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MORRIS COUNTY IN NORTHERN NEW JERSEY.
* UNTIL 145 PM EDT
* AT 1240 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
INTENSIFYING LINE OF THUNDERSTORMS THAT WAS SHOWING SIGNS OF
BECOMING SEVERE AND PRODUCING NICKEL SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTHWEST OF KINNELON TO JUST SOUTHWEST OF
CHESTER...AND MOVING EAST AT 20 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
KINNELON BY 1255 PM EDT...
BOONTON BY 100 PM EDT...
PARSIPPANY AND MORRISTOWN BY 105 PM EDT...
PEQUANNOCK TOWNSHIP BY 110 PM EDT...
MADISON AND EAST HANOVER BY 115 PM EDT...
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
LAT...LON 4103 7449 4104 7444 4100 7438 4099 7429
4089 7427 4090 7428 4090 7434 4086 7432
4079 7437 4075 7436 4066 7447 4066 7452
4070 7450 4075 7456 4073 7476 4090 7469
4107 7451
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 |
| Aug 11, 7:58 PM EDT | Flash Flood Warning | PHI | Mercer | 2 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2004Every severe thunderstorm 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.