Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 58, NWS Philadelphia/Mount Holly

June 1, 2004Philadelphia County, Pennsylvania; Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2004, 3:31 PM EDT for Philadelphia County, Pennsylvania; Burlington County, New Jersey. It was in force for 44 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: Jun 1, 2004, 3:31 PM EDT (19:31 UTC)
Expired: Jun 1, 2004, 4:15 PM EDT
In force: 44 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Burlington County, NJ, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 19:32 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
Jun 1, 12:25 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.5 hours before the alert went out and 207 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 830 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -93 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 011931
SVRPHI
NJC005-PAC101-012015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
331 PM EDT TUE JUN 1 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA
  THIS INCLUDES THE CITY OF PHILADELPHIA
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY

* UNTIL 415 PM EDT

* AT 327 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DIME SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR PHILADELPHIA...OR ABOUT OVER PHILADELPHIA...
  AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PALMYRA BY 345 PM EDT
  RIVERSIDE BY 350 PM EDT
  WILLINGBORO BY 355 PM EDT
  MOUNT HOLLY BY 410 PM EDT

LAT...LON 4006 7518 3997 7523 3996 7506 3993 7477
          4004 7474

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 3:11 PM EDT	Special Marine Warning	PHI		94 min
Jun 1, 4:21 PM EDT	Special Marine Warning	PHI		54 min
Jun 1, 4:21 PM EDT	Special Marine Warning	PHI		54 min
Jun 1, 4:45 PM EDT	Special Marine Warning	PHI		60 min
Jun 1, 4:49 PM EDT	Special Marine Warning	PHI		56 min
Jun 1, 5:10 PM EDT	Special Marine Warning	PHI		50 min
Jun 1, 5:21 PM EDT	Special Marine Warning	PHI		39 min
Jun 1, 5:37 PM EDT	Special Marine Warning	PHI		38 min
Jun 1, 5:45 PM EDT	Special Marine Warning	PHI		60 min
Jun 1, 3:25 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	50 min
Jun 1, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	69 min
Jun 1, 4:11 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	79 min
Jun 1, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	33 min
Jun 1, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	46 min
Jun 1, 4:59 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	61 min
Jun 1, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	36 min
Jun 1, 5:34 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	41 min
Jun 1, 5:39 PM EDT	Severe Thunderstorm Warning	PHI	Morris	36 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2004 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.