Alert archive / New Jersey / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 66, NWS Philadelphia/Mount Holly

July 2, 2014Burlington County, Camden County, Mercer County, New Jersey; Bucks County, Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2014, 7:35 PM EDT for Burlington County, Camden County, Mercer County, New Jersey; Bucks County, Philadelphia County, Pennsylvania. It was in force for 55 min. 4 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, 7:35 PM EDT (23:35 UTC)
Expired: Jul 2, 2014, 8:30 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Burlington County, NJ, Camden County, NJ, Mercer County, NJ, Bucks County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 47 km from the middle of the area, began a volume at 23:37 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, 8:00 PM EDT	TSTM WND DMG	Northeast Philadelphia, PA	TREES AND WIRES DOWN AT SEVERAL LOCATIONS ACROSS NORTHEAST PHILADELPHIA.
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, 8:21 PM EDT	TSTM WND DMG	Lumberton Twp, NJ	WIRES DOWN.

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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.6 hours before the alert went out and 119 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: 1420 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

941 
WUUS51 KPHI 022335
SVRPHI
NJC005-007-021-PAC017-101-030030-
/O.NEW.KPHI.SV.W.0066.140702T2335Z-140703T0030Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  SOUTH CENTRAL MERCER COUNTY IN CENTRAL NEW JERSEY...
  SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTHEASTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 830 PM EDT

* AT 732 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR CINNAMINSON...MOVING
  NORTHEAST AT 25 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING
  WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RIVERSIDE AND ANDALUSIA AROUND 740 PM EDT...
  BEVERLY AND WILLINGBORO AROUND 745 PM EDT...
  LUMBERTON AROUND 750 PM EDT...
  BURLINGTON AND BRISTOL AROUND 755 PM EDT...
  LEVITTOWN AND JACKSONVILLE AROUND 800 PM EDT...
  FLORENCE AND TULLYTOWN AROUND 805 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 4001 7453 3990 7502 4005 7514 4006 7513
      4005 7511 4006 7509 4007 7510 4010 7507
      4031 7474
TIME...MOT...LOC 2335Z 238DEG 21KT 4002 7498

$$

FORECASTER:SFJ

1 follow-up statement

701 
WWUS51 KPHI 030004
SVSPHI

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

NJC005-007-021-PAC017-101-030030-
/O.CON.KPHI.SV.W.0066.000000T0000Z-140703T0030Z/
CAMDEN NJ-MERCER NJ-BUCKS PA-PHILADELPHIA PA-BURLINGTON NJ-
804 PM EDT WED JUL 2 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR NORTHWESTERN BURLINGTON...NORTHEASTERN PHILADELPHIA...
SOUTHEASTERN BUCKS...SOUTH CENTRAL MERCER AND NORTH CENTRAL CAMDEN
COUNTIES...

AT 803 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR FLORENCE...OR 8 MILES
SOUTH OF TRENTON...MOVING NORTHEAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  COLUMBUS AND 9 MILES SOUTHEAST OF YARDLEY BY 810 PM EDT...
  FIELDSBORO...BORDENTOWN...MORRISVILLE AND GEORGETOWN BY 815 PM
  EDT...
  WHITE HORSE AND TRENTON BY 820 PM EDT...
  YARDVILLE-GROVEVILLE AND CROSSWICKS BY 825 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 4001 7453 3990 7502 4005 7514 4006 7513
      4005 7511 4006 7509 4007 7510 4010 7507
      4031 7474
TIME...MOT...LOC 0004Z 238DEG 21KT 4011 7479

$$

SFJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 3:59 AM EDT	Small Craft Advisory	PHI		18 hr
Jul 2, 2:48 PM EDT	Special Weather Statement	PHI	Sussex	42 min
Jul 2, 3:30 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	60 min
Jul 2, 3:36 PM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	46 hr
Jul 2, 3:58 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Jul 2, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	57 min
Jul 2, 4:34 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 2, 5:01 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 2, 5:08 PM EDT	Special Weather Statement	PHI	Hunterdon	52 min
Jul 2, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	67 min
Jul 2, 5:42 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	3 hr
Jul 2, 5:56 PM EDT	Special Weather Statement	PHI	Warren	49 min
Jul 2, 6:06 PM EDT	Special Weather Statement	PHI	Somerset	24 min
Jul 2, 6:13 PM EDT	Flash Flood Warning	PHI	Hunterdon	4 hr
Jul 2, 6:31 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	42 min
Jul 2, 7:09 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	4 hr
Jul 2, 7:15 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Somerset	4 hr
Jul 2, 7:16 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	59 min
Jul 2, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	27 min
Jul 2, 7:52 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Jul 2, 7:58 PM EDT	Special Marine Warning	PHI		62 min
Jul 2, 1:10 PM EDT	Special Weather Statement	PHI	Monroe	65 min
Jul 2, 1:34 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Jul 2, 1:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks	58 min
Jul 2, 2:45 PM EDT	Special Weather Statement	PHI	Berks	30 min
Jul 2, 2:49 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Jul 2, 3:00 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Jul 2, 3:24 PM EDT	Special Weather Statement	PHI	Bucks	66 min
Jul 2, 3:25 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	65 min
Jul 2, 4:56 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Jul 2, 5:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks	59 min
Jul 2, 5:31 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jul 2, 6:44 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jul 2, 6:51 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	4 hr
Jul 2, 7:00 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Montgomery	60 min
Jul 2, 7:26 PM EDT	Special Weather Statement	PHI	Philadelphia	64 min
Jul 2, 7:32 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery, Philadelphia	58 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2014 Severe Thunderstorm Warnings in Pennsylvania, 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.