Alert archive / New Jersey / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 162, NWS Philadelphia/Mount Holly

August 11, 2004Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 11, 2004, 2:02 PM EDT for Somerset County, New Jersey. It was in force for 28 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, 2:02 PM EDT (18:02 UTC)
Expired: Aug 11, 2004, 2:30 PM EDT
In force: 28 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 78 km from the middle of the area, began a volume at 18:05 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, 6.0 hours before the alert went out and 141 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 111802
SVRPHI
NJC035-111830-

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 230 PM EDT

* AT 156 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED JUST
  NORTHEAST OF SOMERVILLE AND MOVING EAST AT 30 MPH.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE 
DAMAGING HAIL. TREES WERE KNOCKED DOWN IN BEDMINSTER TOWNSHIP.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS

LAT...LON 4070 7451 4066 7454 4064 7451 4066 7448
      4065 7441 4063 7441 4058 7451 4054 7454
      4054 7456 4071 7461 4072 7453

$$

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, 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, 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.