Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 155, NWS Philadelphia/Mount Holly

July 7, 2011Burlington County, Camden County, Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 7, 2011, 6:10 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey. It was in force for 40 min. 1 report 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 7, 2011, 6:10 PM EDT (22:10 UTC)
Expired: Jul 7, 2011, 6:50 PM EDT
In force: 40 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 22:12 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 7, 6:12 PM EDT	TSTM WND DMG	Haddonfield, NJ	TREES AND WIRES DOWN IN HADDON HEIGHTS... AUDUBON AND HADDONFIELD.

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.2 hours before the alert went out and 104 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: 549 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1227 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 30 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.

821 
WUUS51 KPHI 072210
SVRPHI
NJC005-007-015-072330-
/O.NEW.KPHI.SV.W.0155.110707T2210Z-110707T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
610 PM EDT THU JUL 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTHERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAMDEN...
  NORTH CENTRAL GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 730 PM EDT

* AT 607 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  WOODBURY...OR 6 MILES SOUTH OF CAMDEN...AND MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BELLMAWR AROUND 615 PM EDT...
  MAGNOLIA AROUND 630 PM EDT...
  CHERRY HILL AROUND 635 PM EDT...
  LINDENWOLD AND SPRINGDALE AROUND 640 PM EDT...
  VOORHEES AND GREENTREE AROUND 645 PM EDT...
  BERLIN AND MARLTON AROUND 650 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

&&

LAT...LON 3972 7469 3977 7525 3988 7518 3988 7515
      3989 7514 3995 7515 3998 7511 3997 7509
      4000 7505 3999 7467
TIME...MOT...LOC 2209Z 271DEG 13KT 3985 7513

$$

NIERENBERG

1 follow-up statement

537 
WWUS51 KPHI 072250
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
650 PM EDT THU JUL 7 2011

NJC005-007-015-072300-
/O.CAN.KPHI.SV.W.0155.000000T0000Z-110707T2330Z/
CAMDEN NJ-GLOUCESTER NJ-BURLINGTON NJ-
650 PM EDT THU JUL 7 2011

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN BURLINGTON...NORTH
CENTRAL GLOUCESTER AND NORTHERN CAMDEN COUNTIES IS CANCELLED...

LAT...LON 3972 7469 3977 7525 3988 7518 3988 7515
      3989 7514 3995 7515 3998 7511 3997 7509
      4000 7505 3999 7467
TIME...MOT...LOC 2250Z 271DEG 13KT 3985 7494

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 1:27 PM EDT	Special Weather Statement	PHI	Burlington	93 min
Jul 7, 3:11 PM EDT	Special Weather Statement	PHI	Atlantic	64 min
Jul 7, 3:15 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	45 min
Jul 7, 3:16 PM EDT	Special Marine Warning	PHI		89 min
Jul 7, 3:26 PM EDT	Severe Thunderstorm Warning	PHI	Warren	64 min
Jul 7, 3:45 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex	90 min
Jul 7, 3:46 PM EDT	Special Weather Statement	PHI	Burlington	89 min
Jul 7, 3:58 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	34 min
Jul 7, 4:17 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	88 min
Jul 7, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	46 min
Jul 7, 4:48 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	57 min
Jul 7, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	63 min
Jul 7, 5:44 PM EDT	Special Weather Statement	PHI	Burlington, Monmouth, Ocean	61 min
Jul 7, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Somerset	74 min
Jul 7, 6:48 PM EDT	Special Weather Statement	PHI	Camden	57 min
Jul 7, 7:32 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Cape May, Cumberland, Salem	88 min
Jul 7, 7:49 PM EDT	Special Weather Statement	PHI	Mercer	86 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2011 Every severe thunderstorm warning in 2011

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.