Alert archive / New Jersey / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 173, NWS Philadelphia/Mount Holly

August 11, 2004Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 11, 2004, 5:53 PM EDT for Middlesex County, New Jersey. It was in force for 67 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, 5:53 PM EDT (21:53 UTC)
Expired: Aug 11, 2004, 7:00 PM EDT
In force: 67 min
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), 53 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 11, 12:55 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.9 hours before the alert went out and 135 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: 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

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 112153
SVRPHI
NJC023-112300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
553 PM EDT WED AUG 11 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MIDDLESEX COUNTY IN NORTHERN NEW JERSEY.

* UNTIL 700 PM EDT

* AT 551 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS TO ABOUT 60 MPH.  THIS STORM WAS LOCATED NEAR
  DAYTON...OR ABOUT 11 MILES SOUTH OF NEW BRUNSWICK...AND MOVING
  NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  JAMESBURG BY 600 PM EDT...
  NORTH BRUNSWICK BY 605 PM EDT...
  EAST BRUNSWICK BY 610 PM EDT...
  OLD BRIDGE BY 615 PM EDT...
  SAYREVILLE BY 620 PM EDT...
  PERTH AMBOY BY 635 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

QUICKLY INTENSIFYING STORMS HAVE HAD A HISTORY OF PRODUCING LARGE HAIL
THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

LAT...LON 4056 7426 4052 7424 4047 7428 4045 7422
      4042 7425 4040 7426 4027 7442 4025 7447
      4028 7449 4034 7464 4039 7459 4057 7429

$$

TFG

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, 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, 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.