Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 117, NWS Philadelphia/Mount Holly

July 2, 2006Montgomery County, Philadelphia County, Pennsylvania; Burlington County, Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2006, 7:01 PM EDT for Montgomery County, Philadelphia County, Pennsylvania; Burlington County, Camden County, New Jersey. It was in force for 59 min. 5 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: Jul 2, 2006, 7:01 PM EDT (23:01 UTC)
Expired: Jul 2, 2006, 8:00 PM EDT
In force: 59 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Burlington County, NJ, Camden County, NJ, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 23:01 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
Jul 2, 7:05 PM EDT	TSTM WND DMG	2 Nne Ardmore, PA	TREES DOWN IN LOWER MERION, A COUPLE INTO HOMES. A FEW OTHER TREES DOWN IN JENKINTOWN.
Jul 2, 7:10 PM EDT	TSTM WND GST 0	Phila, PA	61 MPH GUST AND LIMBS DOWN WITH DIME SIZE HAIL
Jul 2, 7:35 PM EDT	HAIL 0.88	Collingswood, NJ	ALSO NICKEL SIZE HAIL IN BARRINGTON
Jul 2, 7:39 PM EDT	TSTM WND DMG	Moorestown-Lenola, NJ	TREES DOWN IN MOORESTOWN
Jul 2, 7:55 PM EDT	TSTM WND DMG	Cherry Hill, NJ	TREES DOWN IN CHERRY HILL.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 2, 4:03 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.0 hours before the alert went out and 209 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: 5 J/kg
Mixed-layer CIN: -287 J/kg
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 205 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 022301
SVRPHI
NJC005-007-PAC091-101-030000-
/O.NEW.KPHI.SV.W.0117.060702T2301Z-060703T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
701 PM EDT SUN JUL 2 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 800 PM EDT

* AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR BRYN MAWR...OR ABOUT 8
  MILES NORTH OF SPRINGFIELD...AND MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PHILADELPHIA BY 710 PM EDT...
  CAMDEN BY 715 PM EDT...
  PALMYRA AND CHERRYHILL MALL BY 720 PM EDT...
  RIVERSIDE AND CHERRY HILL BY 725 PM EDT...
  WILLINGBORO BY 730 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.

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 4005 7477 3988 7500 3993 7523 4000 7530
      4003 7534 4005 7530 4005 7499 4003 7498
      4005 7496

$$

TFG

2 follow-up statements

000 
WWUS51 KPHI 022315
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
714 PM EDT SUN JUL 2 2006

PAC091-022324-
/O.CAN.KPHI.SV.W.0117.000000T0000Z-060703T0000Z/
MONTGOMERY PA-
714 PM EDT SUN JUL 2 2006

...THE SEVERE THUNDERSTORM WARNING FOR MONTGOMERY COUNTY IS
CANCELLED...
 
THE SEVERE STORM IS NOW IN ROXBOROUGH AND HAS EXITED THE COUNTY.

LAT...LON 3989 7499 3993 7522 3999 7527 4001 7522
      4006 7526 4005 7512 4005 7499 4003 7498
      4005 7495 4005 7477

$$

NJC005-007-PAC101-030000-
/O.CON.KPHI.SV.W.0117.000000T0000Z-060703T0000Z/
CAMDEN NJ-PHILADELPHIA PA-BURLINGTON NJ-
714 PM EDT SUN JUL 2 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHWESTERN BURLINGTON...CENTRAL PHILADELPHIA AND NORTHWESTERN
CAMDEN COUNTIES...

AT 709 PM EDT...A SKYWARN SPOTTER REPORTED A WIND GUST TO 61 MPH
IN ROXBOROUGH ALONG WITH DIME SIZE HAIL.  
THIS STORM WAS LOCATED NEAR PENN WYNNE...OR ABOUT NEAR
PHILADELPHIA...MOVING EAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PENNSAUKEN...PALMYRA...MERCHANTVILLE AND CAMDEN BY 720 PM EDT...
  MAPLE SHADE...CINNAMINSON...RIVERTON AND CHERRYHILL MALL BY 725 PM
  EDT...
  MOORESTOWN-LENOLA AND RAMBLEWOOD BY 730 PM EDT...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS...FREQUENT
LIGHTNING AND LARGE HAIL. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
SUNDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 3989 7499 3993 7522 3999 7527 4001 7522
      4006 7526 4005 7512 4005 7499 4003 7498
      4005 7495 4005 7477

$$
 
TFG

000 
WWUS51 KPHI 022324
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
723 PM EDT SUN JUL 2 2006

NJC005-007-PAC101-030000-
/O.CON.KPHI.SV.W.0117.000000T0000Z-060703T0000Z/
CAMDEN NJ-PHILADELPHIA PA-BURLINGTON NJ-
723 PM EDT SUN JUL 2 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHWESTERN BURLINGTON...SOUTHERN PHILADELPHIA AND NORTHWESTERN
CAMDEN COUNTIES...

AT 722 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED IN SOUTH PHILADELPHIA AND ABOUT TO 
APPROACH CAMDEN...MOVING EAST AT 40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHERRYHILL MALL...MERCHANTVILLE...MAPLE SHADE AND PALMYRA BY 730 PM
  EDT...
  RAMBLEWOOD...MOORESTOWN-LENOLA...CHERRY HILL AND 7 MILES SOUTH OF
  RIVERSIDE BY 735 PM EDT...
  7 MILES SOUTH OF WILLINGBORO BY 740 PM EDT...

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE AND LARGE HAIL.
TAKE SHELTER IMMEDIATELY 
 
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
SUNDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 3989 7499 3993 7522 3996 7519 3999 7517
      4005 7514 4005 7512 4005 7499 4003 7498
      4005 7495 4005 7477

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 4:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	91 min
Jul 2, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	58 min
Jul 2, 6:09 PM EDT	Severe Thunderstorm Warning	PHI	Chester	66 min
Jul 2, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	63 min
Jul 2, 6:24 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	36 min
Jul 2, 6:54 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	51 min
Jul 2, 6:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	32 min
Jul 2, 7:38 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	37 min
Jul 2, 6:19 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	56 min
Jul 2, 6:29 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	46 min
Jul 2, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	57 min
Jul 2, 7:29 PM EDT	Severe Thunderstorm Warning	PHI	Salem	46 min
Jul 2, 7:31 PM EDT	Special Marine Warning	PHI		44 min
Jul 2, 7:43 PM EDT	Special Marine Warning	PHI		62 min
Jul 2, 7:51 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Ocean	84 min
Jul 2, 7:59 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	61 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2006 Severe Thunderstorm Warnings in New Jersey, 2006 Every severe thunderstorm warning in 2006

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.