Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 63, NWS Philadelphia/Mount Holly

June 30, 2012Cumberland County, Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2012, 12:18 AM EDT for Cumberland County, Salem County, New Jersey; New Castle County, Delaware. It was in force for 72 min. 16 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: Jun 30, 2012, 12:18 AM EDT (04:18 UTC)
Expired: Jun 30, 2012, 1:30 AM EDT
In force: 72 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 04:19 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
Jun 30, 12:40 AM EDT	TSTM WND GST 59	Newport, NJ
Jun 30, 12:45 AM EDT	TSTM WND DMG	Elmer, NJ	LARGE LIMBS DOWN
Jun 30, 12:45 AM EDT	TSTM WND DMG	Port Norris, NJ	TREE LIMBS DOWN
Jun 30, 12:45 AM EDT	TSTM WND DMG	Vineland, NJ	DESCRIBED AS STRUCTURAL DAMAGE.
Jun 30, 12:45 AM EDT	TSTM WND GST 62	Upper Deerfield Twp, NJ
Jun 30, 12:50 AM EDT	TSTM WND DMG	Centerton, NJ	* 2 FATAL * PINE TREE FELL ON TENT CAUSING TWO FATALITIES IN PARVIN STATE PARK.
Jun 30, 12:50 AM EDT	TSTM WND GST 59	Newport, NJ	10 MINUTE DURATION.
Jun 30, 12:50 AM EDT	TSTM WND GST 67	Bivalve, NJ
Jun 30, 12:52 AM EDT	TSTM WND GST 63	Millville, NJ	MILLVILLE MUNICIPAL AIRPORT
Jun 30, 12:57 AM EDT	TSTM WND GST 67	Millville, NJ	MILLVILLE MUNICIPAL AIRPORT
Jun 30, 1:00 AM EDT	TSTM WND DMG	Bridgeton, NJ	NUMEROUS TREES KNOCKED DOWN.
Jun 30, 1:00 AM EDT	TSTM WND DMG	Vineland, NJ	TREES DOWN.
Jun 30, 1:00 AM EDT	TSTM WND GST 64	Vineland, NJ	64 MPH GUST RECORDED IN VINELAND.
Jun 30, 1:10 AM EDT	TSTM WND GST 65	Eldora, NJ	MEASURED WIND GUST
Jun 30, 1:17 AM EDT	TSTM WND DMG	Maurice River, NJ	TREES DOWN ON GLADE ROAD.
Jun 30, 1:18 AM EDT	TSTM WND DMG	Delmont, NJ	DOWNED WIRES.

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
Jun 29, 10:09 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 4.3 hours before the alert went out and 167 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: 2642 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1881 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

069 
WUUS51 KPHI 300418
SVRPHI
DEC003-NJC011-033-300530-
/O.NEW.KPHI.SV.W.0063.120630T0418Z-120630T0530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1218 AM EDT SAT JUN 30 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...VINELAND...MILLVILLE...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 130 AM EDT

* AT 1214 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  PORT PENN...OR 8 MILES NORTHEAST OF MIDDLETOWN...AND MOVING EAST AT
  35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ALLOWAY AND 6 MILES NORTH OF SHILOH AROUND 1225 AM EDT...
  SEABROOK FARMS...7 MILES SOUTH OF WOODSTOWN AND 9 MILES NORTH OF
  BRIDGETON AROUND 1230 AM EDT...
  OLIVET...ELMER AND 6 MILES NORTH OF ROSENHAYN AROUND 1235 AM EDT...
  9 MILES NORTH OF VINELAND AROUND 1245 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT
SATURDAY MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHERN NEW JERSEY.

&&

LAT...LON 3918 7492 3921 7503 3918 7515 3924 7517
      3930 7527 3929 7529 3934 7534 3933 7536
      3946 7555 3950 7556 3948 7558 3942 7553
      3941 7562 3958 7566 3961 7558 3978 7544
      3978 7541 3969 7531 3967 7520 3942 7485
TIME...MOT...LOC 0418Z 259DEG 54KT 3952 7550

$$

AMC

1 follow-up statement

205 
WWUS51 KPHI 300448
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1248 AM EDT SAT JUN 30 2012

DEC003-NJC011-033-300530-
/O.CON.KPHI.SV.W.0063.000000T0000Z-120630T0530Z/
NEW CASTLE DE-SALEM NJ-CUMBERLAND NJ-
1248 AM EDT SAT JUN 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM EDT
FOR CUMBERLAND...SALEM AND CENTRAL NEW CASTLE COUNTIES...

AT 1245 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM WOODSTOWN TO FORTESQUE...OR
ALONG A LINE EXTENDING FROM 9 MILES EAST OF WILMINGTON TO 15 MILES
SOUTHWEST OF MILLVILLE...MOVING EAST AT 55 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  DIVIDING CREEK...BIVALVE...ROSENHAYN AND PORT NORRIS BY 1255 AM
  EDT...
  SOUTH VINELAND...PORT ELIZABETH...MAURICETOWN AND LAUREL LAKE BY
  100 AM EDT...
  CUMBERLAND BY 105 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT
SATURDAY MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHERN NEW JERSEY.

&&

LAT...LON 3918 7492 3921 7503 3918 7515 3924 7517
      3930 7527 3929 7529 3934 7534 3933 7536
      3946 7555 3950 7556 3948 7558 3942 7553
      3941 7562 3958 7566 3961 7558 3978 7544
      3978 7541 3969 7531 3967 7520 3942 7485
TIME...MOT...LOC 0448Z 263DEG 48KT 3972 7530 3923 7518

$$

AMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 11:53 PM EDT	Special Marine Warning	PHI		97 min
Jun 30, 12:04 AM EDT	Special Marine Warning	PHI		116 min
Jun 30, 12:25 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	65 min
Jun 30, 12:27 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	63 min
Jun 30, 12:34 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	56 min
Jun 30, 1:11 AM EDT	Special Marine Warning	PHI		64 min
Jun 30, 1:31 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	59 min
Jun 30, 2:18 AM EDT	Special Marine Warning	PHI		117 min
Jun 29, 11:22 PM EDT	Special Weather Statement	PHI	New Castle	53 min
Jun 29, 11:38 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	67 min
Jun 29, 11:50 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	55 min
Jun 30, 12:45 AM EDT	Special Weather Statement	PHI	Kent, New Castle, Sussex	60 min
Jun 30, 3:48 AM EDT	Heat Advisory	PHI	Kent, Sussex	16 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012 Severe Thunderstorm Warnings in Delaware, 2012 Every severe thunderstorm warning in 2012

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.