Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 137, NWS Philadelphia/Mount Holly

July 28, 20126 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2012, 6:18 PM EDT for 6 counties in New Jersey. It was in force for 57 min. 3 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 28, 2012, 6:18 PM EDT (22:18 UTC)
Expired: Jul 28, 2012, 7:15 PM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 42 km from the middle of the area, began a volume at 22:18 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 28, 6:25 PM EDT	TSTM WND DMG	Deerfield Twp, NJ	TREES DOWN IN DEERFIELD TWP.
Jul 28, 6:37 PM EDT	HAIL 0.5	Vineland, NJ
Jul 28, 6:55 PM EDT	TSTM WND DMG	Vineland, NJ	WIRES DOWN IN VINELAND.

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 28, 1:36 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.3 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: 899 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 840 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

942 
WUUS51 KPHI 282218
SVRPHI
NJC001-005-007-011-015-033-282315-
/O.NEW.KPHI.SV.W.0137.120728T2218Z-120728T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
618 PM EDT SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  NORTHERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF VINELAND...
  SOUTHEASTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 715 PM EDT

* AT 614 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 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 BERLIN TO SICKLERVILLE TO
  NEWFIELD TO ROSENHAYN...OR ALONG A LINE EXTENDING FROM 13 MILES
  SOUTHEAST OF CAMDEN TO 16 MILES SOUTHEAST OF CAMDEN TO 8 MILES
  NORTH OF VINELAND TO 8 MILES WEST OF VINELAND...AND MOVING EAST AT
  15 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MARLTON LAKES AROUND 625 PM EDT...
  EVESHAM...ATCO...NEWFIELD AND CHESILHURST AROUND 630 PM EDT...
  VINELAND AROUND 640 PM EDT...
  MEDFORD AROUND 650 PM EDT...
  MEDFORD AND BUENA AROUND 655 PM EDT...
  HAMMONTON AROUND 700 PM 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 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3996 7449 3985 7451 3970 7454 3946 7478
      3945 7529 3960 7515 3971 7507 3989 7497
TIME...MOT...LOC 2218Z 251DEG 13KT 3981 7493 3974 7494
          3959 7498 3950 7512

$$

HAYES

3 follow-up statements

367 
WWUS51 KPHI 282245
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
645 PM EDT SAT JUL 28 2012

NJC001-005-007-011-015-033-282315-
/O.CON.KPHI.SV.W.0137.000000T0000Z-120728T2315Z/
CAMDEN NJ-GLOUCESTER NJ-BURLINGTON NJ-ATLANTIC NJ-SALEM NJ-
CUMBERLAND NJ-
645 PM EDT SAT JUL 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHERN CUMBERLAND...SOUTHEASTERN SALEM...NORTHWESTERN
ATLANTIC...SOUTH CENTRAL BURLINGTON...SOUTHEASTERN GLOUCESTER AND
SOUTHEASTERN CAMDEN COUNTIES...

AT 644 PM 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 8 MILES NORTHEAST OF
CHESILHURST TO COLLINGS LAKES TO NEWFIELD...OR ALONG A LINE EXTENDING
FROM 17 MILES SOUTHEAST OF CAMDEN TO 13 MILES NORTHEAST OF VINELAND
TO VINELAND...MOVING EAST AT 15 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  BUENA BY 655 PM EDT...
  HAMMONTON BY 700 PM EDT...
  FOLSOM BY 705 PM EDT...
  ELWOOD-MAGNOLIA...ELWOOD...WEYMOUTH AND MIZPAH BY 715 PM 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 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3976 7490 3972 7463 3973 7455 3969 7455
      3946 7478 3945 7529 3960 7515 3971 7507
TIME...MOT...LOC 2246Z 251DEG 13KT 3985 7481 3962 7486
          3953 7500

$$

HAYES

699 
WWUS51 KPHI 282258
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
658 PM EDT SAT JUL 28 2012

NJC033-282308-
/O.CAN.KPHI.SV.W.0137.000000T0000Z-120728T2315Z/
SALEM NJ-
658 PM EDT SAT JUL 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SALEM COUNTY IS
CANCELLED...

THE LINE OF STORMS THAT PROMPTED THE WARNING HAS MOVED OUT OF THE 
COUNTY. 

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 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 3968 7456 3946 7478 3946 7512 3948 7511
      3946 7508 3954 7507 3969 7497 3976 7487
      3972 7466 3973 7455
TIME...MOT...LOC 2258Z 251DEG 13KT 3974 7480 3963 7481
          3948 7500

$$

NJC001-005-007-011-015-282315-
/O.CON.KPHI.SV.W.0137.000000T0000Z-120728T2315Z/
CAMDEN NJ-GLOUCESTER NJ-BURLINGTON NJ-ATLANTIC NJ-CUMBERLAND NJ-
658 PM EDT SAT JUL 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTH CENTRAL CUMBERLAND...NORTHWESTERN ATLANTIC...SOUTH CENTRAL
BURLINGTON...SOUTHEASTERN GLOUCESTER AND SOUTHEASTERN CAMDEN
COUNTIES...

AT 657 PM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60
MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
CHESILHURST TO HAMMONTON TO VINELAND...OR ALONG A LINE EXTENDING FROM
21 MILES SOUTHEAST OF CAMDEN TO 15 MILES NORTHEAST OF VINELAND TO
VINELAND...MOVING EAST AT 15 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  MIZPAH...ELWOOD-MAGNOLIA...ELWOOD AND WEYMOUTH BY 715 PM 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 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3968 7456 3946 7478 3946 7512 3948 7511
      3946 7508 3954 7507 3969 7497 3976 7487
      3972 7466 3973 7455
TIME...MOT...LOC 2258Z 251DEG 13KT 3974 7480 3963 7481
          3948 7500

$$

HAYES

520 
WWUS51 KPHI 282311
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
711 PM EDT SAT JUL 28 2012

NJC001-005-007-011-015-282322-
/O.EXP.KPHI.SV.W.0137.000000T0000Z-120728T2315Z/
CAMDEN NJ-GLOUCESTER NJ-BURLINGTON NJ-ATLANTIC NJ-CUMBERLAND NJ-
711 PM EDT SAT JUL 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL CUMBERLAND...
NORTHWESTERN ATLANTIC...SOUTH CENTRAL BURLINGTON...SOUTHEASTERN
GLOUCESTER AND SOUTHEASTERN CAMDEN COUNTIES WILL EXPIRE AT 715 PM
EDT...

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 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 3968 7456 3946 7478 3946 7512 3948 7511
      3946 7508 3954 7507 3969 7497 3976 7487
      3972 7466 3973 7455
TIME...MOT...LOC 2312Z 251DEG 13KT 3976 7474 3965 7475
          3950 7494

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 11:45 AM EDT	Special Weather Statement	PHI	Burlington, Camden	90 min
Jul 28, 11:47 AM EDT	Special Weather Statement	PHI	Monmouth	58 min
Jul 28, 12:21 PM EDT	Special Weather Statement	PHI	Mercer	39 min
Jul 28, 12:30 PM EDT	Special Weather Statement	PHI	Ocean	60 min
Jul 28, 12:43 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	44 min
Jul 28, 12:47 PM EDT	Special Weather Statement	PHI	Cumberland	58 min
Jul 28, 12:50 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	55 min
Jul 28, 12:55 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Somerset	48 min
Jul 28, 1:02 PM EDT	Special Marine Warning	PHI		58 min
Jul 28, 1:09 PM EDT	Special Weather Statement	PHI	Sussex	66 min
Jul 28, 1:20 PM EDT	Special Weather Statement	PHI	Ocean	55 min
Jul 28, 1:26 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jul 28, 1:28 PM EDT	Special Marine Warning	PHI		62 min
Jul 28, 1:36 PM EDT	Special Weather Statement	PHI	Sussex	54 min
Jul 28, 1:41 PM EDT	Special Weather Statement	PHI	Monmouth	64 min
Jul 28, 1:52 PM EDT	Special Weather Statement	PHI	Morris	53 min
Jul 28, 2:03 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Jul 28, 2:08 PM EDT	Special Weather Statement	PHI	Sussex	67 min
Jul 28, 2:13 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex	3 hr
Jul 28, 2:13 PM EDT	Special Weather Statement	PHI	Cape May	62 min
Jul 28, 2:18 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden	3 hr
Jul 28, 2:26 PM EDT	Special Weather Statement	PHI	Morris	64 min
Jul 28, 2:28 PM EDT	Special Marine Warning	PHI		42 min
Jul 28, 2:37 PM EDT	Special Marine Warning	PHI		53 min
Jul 28, 2:48 PM EDT	Special Weather Statement	PHI	Burlington	57 min
Jul 28, 2:57 PM EDT	Special Weather Statement	PHI	Camden	63 min
Jul 28, 3:09 PM EDT	Special Weather Statement	PHI	Atlantic	66 min
Jul 28, 3:22 PM EDT	Special Weather Statement	PHI	Morris	53 min
Jul 28, 3:30 PM EDT	Special Weather Statement	PHI	Warren	60 min
Jul 28, 3:33 PM EDT	Areal Flood Advisory	PHI	Warren	81 min
Jul 28, 4:13 PM EDT	Special Marine Warning	PHI		62 min
Jul 28, 4:20 PM EDT	Special Weather Statement	PHI	Warren	55 min
Jul 28, 4:31 PM EDT	Special Weather Statement	PHI	Atlantic	59 min
Jul 28, 4:47 PM EDT	Flash Flood Warning	PHI	Warren	4 hr
Jul 28, 4:57 PM EDT	Special Weather Statement	PHI	Burlington	63 min
Jul 28, 5:04 PM EDT	Special Weather Statement	PHI	Somerset	56 min
Jul 28, 5:06 PM EDT	Special Weather Statement	PHI	Camden	54 min
Jul 28, 5:08 PM EDT	Special Marine Warning	PHI		67 min
Jul 28, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	38 min
Jul 28, 5:28 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Warren	3 hr
Jul 28, 5:32 PM EDT	Areal Flood Advisory	PHI	Atlantic	3 hr
Jul 28, 5:52 PM EDT	Special Weather Statement	PHI	Cumberland	53 min
Jul 28, 5:58 PM EDT	Special Weather Statement	PHI	Somerset	62 min
Jul 28, 6:03 PM EDT	Special Weather Statement	PHI	Warren	57 min
Jul 28, 6:05 PM EDT	Special Weather Statement	PHI	Atlantic	55 min
Jul 28, 6:06 PM EDT	Special Marine Warning	PHI		54 min
Jul 28, 6:29 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	99 min
Jul 28, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	56 min
Jul 28, 6:45 PM EDT	Special Weather Statement	PHI	Warren	60 min
Jul 28, 7:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 28, 7:24 PM EDT	Special Weather Statement	PHI	Atlantic	66 min
Jul 28, 7:32 PM EDT	Special Weather Statement	PHI	Atlantic	58 min
Jul 28, 7:40 PM EDT	Special Weather Statement	PHI	Warren	65 min
Jul 28, 7:56 PM EDT	Special Weather Statement	PHI	Hunterdon	64 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 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.