Alert archive / New Jersey / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 148, NWS Philadelphia/Mount Holly

September 17, 2005Burlington County, New Jersey; Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 17, 2005, 8:32 PM EDT for Burlington County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 43 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 17, 2005, 8:32 PM EDT (00:32 UTC)
Expired: Sep 17, 2005, 9:15 PM EDT
In force: 43 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), 54 km from the middle of the area, began a volume at 00:32 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.

What was reported inside it

Time	Report	Where	Remark
Sep 17, 8:40 PM EDT	TSTM WND DMG	N. Philadelphia, PA	TREES KNOCKED DOWN IN NORTH PHILADELPHIA.
Sep 17, 8:50 PM EDT	TSTM WND DMG	Cinnaminson, NJ	NUMEROUS TREES KNOCKED DOWN ACROSS CINNAMINSON.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 0.5 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: 1139 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 767 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 180032
SVRPHI
NJC005-PAC101-180115-
/O.NEW.KPHI.SV.W.0148.050918T0032Z-050918T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
832 PM EDT SAT SEP 17 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 915 PM EDT

* AT 824 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A STRENGTHENING AND SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY
  SIZE HAIL.  THIS STORM WAS LOCATED NEAR PHILADELPHIA...AND MOVING
  EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PALMYRA BY 845 PM EDT
  RIVERSIDE AND BEVERLY BY 855 PM EDT
  WILLINGBORO BY 900 PM EDT
  MOUNT HOLLY BY 910 PM EDT

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4007 7520 3993 7527 3998 7505 3993 7475
      4008 7475

$$

MPD

1 follow-up statement

000 
WWUS51 KPHI 180050
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
850 PM EDT SAT SEP 17 2005

PAC101-180100-
/O.CAN.KPHI.SV.W.0148.000000T0000Z-050918T0115Z/
PHILADELPHIA PA-
850 PM EDT SAT SEP 17 2005

...THE SEVERE THUNDERSTORM WARNING FOR PHILADELPHIA COUNTY IS
CANCELLED...

LAT...LON 4005 7496 3999 7502 3998 7505 3993 7475
      4008 7475

$$

NJC005-180115-
/O.CON.KPHI.SV.W.0148.000000T0000Z-050918T0115Z/
BURLINGTON NJ-
850 PM EDT SAT SEP 17 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 915 PM EDT FOR
NORTHWESTERN BURLINGTON COUNTY...

AT 841 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR
CINNAMINSON...OR ABOUT NEAR PHILADELPHIA...MOVING EAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  EDGEWATER PARK BY 855 PM EDT
  WILLINGBORO BY 900 PM EDT
  MOUNT HOLLY BY 910 PM EDT

LAT...LON 4005 7496 3999 7502 3998 7505 3993 7475
      4008 7475

$$

MPD

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 9:53 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	26 min
Sep 17, 11:07 PM EDT	Special Marine Warning	PHI		53 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2005 Severe Thunderstorm Warnings in Pennsylvania, 2005 Every severe thunderstorm warning in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.