Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 68, NWS Philadelphia/Mount Holly

July 2, 2014Delaware County, Philadelphia County, Pennsylvania; 5 counties in New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2014, 8:08 PM EDT for Delaware County, Philadelphia County, Pennsylvania; 5 counties in New Jersey; New Castle County, Delaware. It was in force for 52 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 2, 2014, 8:08 PM EDT (00:08 UTC)
Expired: Jul 2, 2014, 9:00 PM EDT
In force: 52 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 78 km from the middle of the area, began a volume at 00:08 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, 8:10 PM EDT	TSTM WND DMG	4 Sw Mount Holly Wfo, NJ	TREE DOWN ALONG I 295. TIME ESTIMATED FROM RADAR
Jul 2, 8:20 PM EDT	TSTM WND DMG	2 Nw Cinnaminson, NJ	DAMAGE TO SAIL BOATS REPORTED AS THE STORM MOVED OVER THE DELAWARE RIVER.
Jul 2, 9:09 PM EDT	HAIL 0.25	Berlin, NJ	PEA SIZED HAIL REPORTED

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, 1:22 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.1 hours before the alert went out and 203 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: 291 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 1753 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

264 
WUUS51 KPHI 030008
SVRPHI
DEC003-NJC005-007-011-015-033-PAC045-101-030100-
/O.NEW.KPHI.SV.W.0068.140703T0008Z-140703T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
808 PM EDT WED JUL 2 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  SOUTHEASTERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  WEST CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 900 PM EDT

* AT 805 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  GERMANTOWN TO ODESSA...MOVING EAST AT 20 MPH. THESE STORMS ARE
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GIBBSTOWN AND PHILADELPHIA INTERNATIONAL AIRPORT AROUND 815 PM
  EDT...
  GIBBSTOWN AND SOUTH PHILADELPHIA AROUND 820 PM EDT...
  PAULSBORO AND HANCOCKS BRIDGE AROUND 825 PM EDT...
  TACONY AND CAMDEN AROUND 830 PM EDT...
  HOLMESBURG AND PALMYRA AROUND 835 PM EDT...
  WOODBURY HEIGHTS AND WESTVILLE AROUND 840 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3998 7528 4001 7521 4004 7525 4009 7521
      4005 7511 4008 7508 4008 7497 4005 7497
      4008 7490 4007 7474 3938 7523 3939 7545
      3943 7547 3945 7554 3957 7552 3959 7555
      3951 7555 3947 7558 3940 7552 3941 7571
TIME...MOT...LOC 0007Z 270DEG 17KT 4003 7519 3943 7564

$$

FORECASTER:SFJ

2 follow-up statements

754 
WWUS51 KPHI 030035
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
835 PM EDT WED JUL 2 2014

DEC003-NJC005-007-011-015-033-PAC045-101-030100-
/O.CON.KPHI.SV.W.0068.000000T0000Z-140703T0100Z/
CAMDEN NJ-PHILADELPHIA PA-DELAWARE PA-GLOUCESTER NJ-NEW CASTLE DE-
BURLINGTON NJ-SALEM NJ-CUMBERLAND NJ-
835 PM EDT WED JUL 2 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTHWESTERN CUMBERLAND...SALEM...WEST CENTRAL BURLINGTON...
CENTRAL NEW CASTLE...GLOUCESTER...SOUTHEASTERN DELAWARE...
PHILADELPHIA AND WESTERN CAMDEN COUNTIES...

AT 832 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM TACONY TO HOPE CREEK...OR ALONG A LINE EXTENDING FROM
PHILADELPHIA TO 14 MILES WEST OF BRIDGETON...MOVING EAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  RIVERTON...OAKLYN...OAK VALLEY AND MOUNT EPHRAIM BY 840 PM EDT...
  RIVERSIDE...DELANCO...WENONAH AND MAPLE SHADE BY 845 PM EDT...
  EDGEWATER PARK AND BEVERLY BY 850 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEAST PENNSYLVANIA.

LAT...LON 3998 7528 4001 7521 4004 7525 4009 7521
      4005 7511 4008 7508 4008 7497 4005 7497
      4008 7490 4007 7474 3938 7523 3939 7545
      3943 7547 3945 7554 3957 7552 3959 7555
      3951 7555 3947 7558 3940 7552 3941 7571
TIME...MOT...LOC 0035Z 270DEG 17KT 4003 7502 3943 7547

$$

SFJ

898 
WWUS51 KPHI 030045
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
845 PM EDT WED JUL 2 2014

DEC003-030055-
/O.CAN.KPHI.SV.W.0068.000000T0000Z-140703T0100Z/
NEW CASTLE DE-
845 PM EDT WED JUL 2 2014

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL NEW CASTLE COUNTY IS 
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEAST PENNSYLVANIA.

LAT...LON 3948 7517 3957 7552 3960 7556 3998 7528
      4001 7521 4004 7525 4008 7521 4005 7511
      4008 7508 4008 7497 4005 7497 4008 7488
      4007 7474
TIME...MOT...LOC 0045Z 270DEG 17KT 4003 7496 3953 7533

$$

NJC005-007-011-015-033-PAC045-101-030100-
/O.CON.KPHI.SV.W.0068.000000T0000Z-140703T0100Z/
CAMDEN NJ-PHILADELPHIA PA-DELAWARE PA-GLOUCESTER NJ-BURLINGTON NJ-
SALEM NJ-CUMBERLAND NJ-
845 PM EDT WED JUL 2 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR NORTH CENTRAL CUMBERLAND...SALEM...WEST CENTRAL BURLINGTON...
GLOUCESTER...SOUTHEASTERN DELAWARE...PHILADELPHIA AND WESTERN CAMDEN
COUNTIES...

AT 842 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM RIVERSIDE TO ALLOWAY...OR ALONG A LINE EXTENDING FROM
9 MILES EAST OF PHILADELPHIA TO 10 MILES NORTHWEST OF BRIDGETON...
MOVING EAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  EDGEWATER PARK...TAVISTOCK...RUNNEMEDE AND MOORESTOWN-LENOLA BY 850
  PM EDT...
  EDGEWATER PARK...WILLINGBORO...TAVISTOCK AND SOMERDALE BY 855 PM
  EDT...
  STRATFORD AND TURNERSVILLE BY 900 PM EDT...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEAST PENNSYLVANIA.

LAT...LON 3948 7517 3957 7552 3960 7556 3998 7528
      4001 7521 4004 7525 4008 7521 4005 7511
      4008 7508 4008 7497 4005 7497 4008 7488
      4007 7474
TIME...MOT...LOC 0045Z 270DEG 17KT 4003 7496 3953 7533

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 8:25 PM EDT	Flash Flood Warning	PHI	Bucks	4 hr
Jul 2, 8:33 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	57 min
Jul 2, 10:08 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	67 min
Jul 2, 10:38 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery, Philadelphia	112 min
Jul 3, 1:22 PM EDT	Special Weather Statement	PHI	Northampton	38 min
Jul 3, 1:57 PM EDT	Tornado Warning	PHI	Northampton	24 min
Jul 3, 3:15 PM EDT	Special Weather Statement	PHI	Lebanon	45 min
Jul 3, 4:08 PM EDT	Special Weather Statement	PHI	Carbon	52 min
Jul 3, 5:06 PM EDT	Special Weather Statement	PHI	Monroe	24 min
Jul 3, 5:36 PM EDT	Severe Thunderstorm Warning	PHI	Chester	69 min
Jul 3, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	35 min
Jul 3, 5:58 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	62 min
Jul 3, 6:02 PM EDT	Tornado Warning	PHI	Carbon, Monroe	28 min
Jul 3, 6:17 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Jul 3, 6:19 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Jul 3, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	39 min
Jul 3, 6:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	44 min
Jul 3, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	58 min
Jul 3, 6:54 PM EDT	Special Weather Statement	PHI	Montgomery	66 min
Jul 3, 7:02 PM EDT	Areal Flood Advisory	PHI	Northampton	4 hr
Jul 3, 7:25 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	65 min
Jul 3, 7:29 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	61 min
Jul 2, 8:07 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	4 hr
Jul 2, 8:19 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Monmouth	56 min
Jul 2, 8:53 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean, Salem	67 min
Jul 2, 8:59 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Monmouth, Ocean	4 hr
Jul 2, 9:54 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	44 min
Jul 2, 10:20 PM EDT	Special Marine Warning	PHI		55 min
Jul 2, 10:30 PM EDT	Special Weather Statement	PHI	Atlantic	60 min
Jul 2, 10:58 PM EDT	Special Weather Statement	PHI	Burlington	62 min
Jul 2, 11:17 PM EDT	Flash Flood Warning	PHI	Burlington	3 hr
Jul 3, 12:19 AM EDT	Special Marine Warning	PHI		116 min
Jul 3, 12:23 AM EDT	Special Marine Warning	PHI		67 min
Jul 3, 12:26 AM EDT	Special Marine Warning	PHI		64 min
Jul 3, 12:41 AM EDT	Severe Thunderstorm Warning	PHI	Cumberland	50 min
Jul 3, 1:00 AM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	45 min
Jul 3, 1:14 AM EDT	Special Marine Warning	PHI		61 min
Jul 3, 1:19 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	56 min
Jul 3, 1:52 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Ocean	4 hr
Jul 3, 1:56 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Ocean	53 min
Jul 3, 2:08 AM EDT	Special Marine Warning	PHI		67 min
Jul 3, 2:34 AM EDT	Special Weather Statement	PHI	Monmouth	56 min
Jul 3, 5:46 AM EDT	Small Craft Advisory	PHI		54 hr
Jul 3, 2:23 PM EDT	Special Weather Statement	PHI	Sussex	52 min
Jul 3, 3:27 PM EDT	High Surf Advisory	PHI	Atlantic, Cape May, Monmouth, Ocean	41 hr
Jul 3, 4:26 PM EDT	Special Weather Statement	PHI	Warren	49 min
Jul 3, 5:00 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	60 min
Jul 3, 5:21 PM EDT	Special Weather Statement	PHI	Sussex	54 min
Jul 3, 5:50 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	55 min
Jul 3, 6:38 PM EDT	Special Weather Statement	PHI	Warren	67 min
Jul 3, 6:42 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 3, 7:05 PM EDT	Special Weather Statement	PHI	Hunterdon	55 min
Jul 3, 7:14 PM EDT	Special Weather Statement	PHI	Sussex	61 min
Jul 3, 7:20 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Morris, Somerset	55 min
Jul 3, 7:44 PM EDT	Flash Flood Warning	PHI	Mercer, Middlesex, Morris, Somerset	4 hr
Jul 2, 10:24 PM EDT	Special Weather Statement	PHI	New Castle	36 min
Jul 2, 11:47 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	58 min
Jul 3, 12:04 AM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	56 min
Jul 3, 12:34 AM EDT	Areal Flood Advisory	PHI	Kent, New Castle	3 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014 Severe Thunderstorm Warnings in Pennsylvania, 2014 Severe Thunderstorm Warnings in Delaware, 2014 Every severe thunderstorm warning in 2014

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.