Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 35, NWS Philadelphia/Mount Holly

June 18, 2013Atlantic County, Burlington County, Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 18, 2013, 1:39 PM EDT for Atlantic County, Burlington County, Camden County, New Jersey. It was in force for 81 min. 2 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 18, 2013, 1:39 PM EDT (17:39 UTC)
Expired: Jun 18, 2013, 3:00 PM EDT
In force: 81 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ

The radar

The Philadelphia radar (KDIX), 44 km from the middle of the area, began a volume at 17:40 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 18, 1:40 PM EDT	TSTM WND DMG	Glendora, NJ	TREE DOWN.
Jun 18, 3:00 PM EDT	TSTM WND DMG	Cherry Hill, NJ	ROUTE 70 AT SPRINGDALE ROAD CLOSED DUE TO DOWNED POWER LINES.

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, 5.7 hours before the alert went out and 110 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: 811 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 833 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

081 
WUUS51 KPHI 181739
SVRPHI
NJC001-005-007-181900-
/O.NEW.KPHI.SV.W.0035.130618T1739Z-130618T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
139 PM EDT TUE JUN 18 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  NORTH CENTRAL ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 300 PM EDT

* AT 136 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR SOMERDALE...MOVING EAST AT
  20 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH DIAMETER
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  VOORHEES AND MARLTON AROUND 145 PM EDT...
  BERLIN AND EVESHAM AROUND 150 PM EDT...
  MARLTON LAKES AROUND 155 PM EDT...
  ATCO AROUND 200 PM EDT...
  CHESILHURST AROUND 205 PM EDT...
  MEDFORD AROUND 210 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

VERY HEAVY RAIN WILL ALSO OCCUR WITH THIS SEVERE THUNDERSTORM...WHICH
COULD FLOOD LOW LYING AREAS QUICKLY AND COVER ROADS WITH WATER. DO
NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3961 7454 3975 7502 3979 7506 3978 7507
      3978 7508 3980 7508 3982 7509 3982 7508
      3994 7508 3990 7446 3988 7445
TIME...MOT...LOC 1739Z 284DEG 17KT 3985 7499

$$

NIERENBERG

1 follow-up statement

055 
WWUS51 KPHI 181827
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
227 PM EDT TUE JUN 18 2013

NJC001-005-007-181837-
/O.CAN.KPHI.SV.W.0035.000000T0000Z-130618T1900Z/
CAMDEN NJ-BURLINGTON NJ-ATLANTIC NJ-
227 PM EDT TUE JUN 18 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ATLANTIC...
SOUTHERN BURLINGTON AND CENTRAL CAMDEN COUNTIES IS CANCELLED...

THE STORM HAS WEAKENED TO BELOW SEVERE LIMITS...THEREFORE THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.

HOWEVER, HEAVY RAIN AND WIND GUSTS TO 40 MPH ARE POSSIBLE AS WELL AS 
DANGEROUS CLOUD TO GROUND LIGHTNING.

LAT...LON 3961 7454 3975 7502 3979 7506 3978 7507
      3978 7508 3980 7508 3982 7509 3982 7508
      3994 7508 3990 7446 3988 7445
TIME...MOT...LOC 1827Z 284DEG 17KT 3979 7470

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 8:16 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland, Salem	119 min
Jun 17, 8:28 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	107 min
Jun 17, 9:20 PM EDT	Areal Flood Advisory	PHI	Cumberland	3 hr
Jun 17, 9:51 PM EDT	Special Weather Statement	PHI	Cape May, Cumberland, Salem	114 min
Jun 18, 12:14 PM EDT	Areal Flood Advisory	PHI	Mercer	3 hr
Jun 18, 12:25 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Monmouth, Ocean	50 min
Jun 18, 1:10 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	65 min
Jun 18, 1:28 PM EDT	Special Weather Statement	PHI	Burlington, Camden	62 min
Jun 18, 1:32 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	3 hr
Jun 18, 1:53 PM EDT	Special Weather Statement	PHI	Salem	82 min
Jun 18, 2:10 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Monmouth and 2 more	3 hr
Jun 18, 3:05 PM EDT	Special Marine Warning	PHI		55 min
Jun 18, 3:19 PM EDT	Special Weather Statement	PHI	Atlantic	71 min
Jun 18, 3:42 PM EDT	Special Marine Warning	PHI		93 min
Jun 18, 3:44 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	3 hr
Jun 18, 3:55 PM EDT	Special Marine Warning	PHI		65 min
Jun 18, 4:44 PM EDT	Flash Flood Warning	PHI	Morris, Sussex, Warren	4 hr
Jun 18, 4:45 PM EDT	Special Weather Statement	PHI	Morris	75 min
Jun 18, 4:52 PM EDT	Special Weather Statement	PHI	Morris, Warren	53 min
Jun 18, 5:56 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Somerset	4 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2013 Every severe thunderstorm warning in 2013

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.