Alert archive / New Jersey / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 139, NWS Philadelphia/Mount Holly

July 14, 2004Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2004, 5:53 PM EDT for Mercer County, New Jersey. It was in force for 52 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 14, 2004, 5:53 PM EDT (21:53 UTC)
Expired: Jul 14, 2004, 6:45 PM EDT
In force: 52 min
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), 39 km from the middle of the area, began a volume at 21:56 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.9 hours before the alert went out and 148 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 719 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 125 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 
WUUS51 KPHI 142153
SVRPHI
NJC021-142245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
552 PM EDT WED JUL 14 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY
  THIS INCLUDES THE CITY OF TRENTON

* UNTIL 645 PM EDT

* AT 551 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND 
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER 
  LOWER BUCKS COUNTY...AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TRENTON AND LAWRENCEVILLE BY 600 PM EDT...
  WHITE HORSE AND MERCERVILLE-HAMILTON SQUARE BY 605 PM EDT...
  TWIN RIVERS BY 620 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 4028 7452 4025 7448 4020 7456 4017 7457
      4017 7462 4013 7460 4017 7468 4016 7472
      4025 7484 4030 7487 4032 7492 4034 7492

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 2:22 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	53 min
Jul 14, 3:20 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	55 min
Jul 14, 3:40 PM EDT	Flash Flood Warning	PHI	Hunterdon, Monmouth	77 days
Jul 14, 4:15 PM EDT	Severe Thunderstorm Warning	PHI	Salem	60 min
Jul 14, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	56 min
Jul 14, 5:04 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	56 min
Jul 14, 5:10 PM EDT	Tornado Warning	PHI	Cumberland, Salem	35 min
Jul 14, 5:17 PM EDT	Flash Flood Warning	PHI	Salem	3 hr
Jul 14, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	64 min
Jul 14, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland	65 min
Jul 14, 7:07 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	53 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2004 Every 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.