Alert archive / New Jersey / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 12, NWS Philadelphia/Mount Holly

May 11, 20134 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 11, 2013, 3:54 PM EDT for 4 counties in New Jersey. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 11, 2013, 3:54 PM EDT (19:54 UTC)
Expired: May 11, 2013, 5:00 PM EDT
In force: 66 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 37 km from the middle of the area, began a volume at 19:56 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.9 hours before the alert went out and 202 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

872 
WUUS51 KPHI 111954
SVRPHI
NJC001-005-007-015-112100-
/O.NEW.KPHI.SV.W.0012.130511T1954Z-130511T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
354 PM EDT SAT MAY 11 2013

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...
  SOUTHEASTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 500 PM EDT

* AT 351 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  VICTORY LAKES...OR 10 MILES NORTH OF VINELAND...AND MOVING
  NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WILLIAMSTOWN AND SICKLERVILLE AROUND 400 PM EDT...
  CHESILHURST AND ATCO AROUND 410 PM EDT...
  ATSION AROUND 420 PM EDT...
  SHAMONG AROUND 425 PM EDT...
  TABERNACLE AROUND 430 PM EDT...
  LEISURETOWNE AROUND 435 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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3955 7494 3966 7512 4009 7473 3994 7448
      3985 7444
TIME...MOT...LOC 1954Z 227DEG 30KT 3963 7499

$$

HEAVENER

2 follow-up statements

043 
WWUS51 KPHI 112019
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
419 PM EDT SAT MAY 11 2013

NJC001-007-015-112029-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-130511T2100Z/
CAMDEN NJ-GLOUCESTER NJ-ATLANTIC NJ-
419 PM EDT SAT MAY 11 2013

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ATLANTIC...
SOUTHEASTERN GLOUCESTER AND SOUTHEASTERN CAMDEN COUNTIES IS
CANCELLED...

LAT...LON 3985 7444 3973 7473 3979 7481 3978 7487
      3980 7491 3984 7492 4007 7469 3994 7448
TIME...MOT...LOC 2019Z 227DEG 30KT 3977 7479

$$

NJC005-112100-
/O.CON.KPHI.SV.W.0012.000000T0000Z-130511T2100Z/
BURLINGTON NJ-
419 PM EDT SAT MAY 11 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR CENTRAL BURLINGTON COUNTY...

AT 417 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ATSION...OR 19 MILES SOUTHEAST OF GLOUCESTER CITY...
MOVING NORTHEAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SHAMONG AND MEDFORD LAKES BY 425 PM EDT...
  TABERNACLE BY 430 PM EDT...
  LEISURETOWNE BY 435 PM EDT...
  PEMBERTON HEIGHTS BY 440 PM EDT...
  PRESIDENTIAL LAKES BY 445 PM EDT...
  COUNTRY LAKE ESTATES...BROWNS MILLS AND FORT DIX BY 450 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

&&

LAT...LON 3985 7444 3973 7473 3979 7481 3978 7487
      3980 7491 3984 7492 4007 7469 3994 7448
TIME...MOT...LOC 2019Z 227DEG 30KT 3977 7479

$$

HEAVENER

828 
WWUS51 KPHI 112030
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
430 PM EDT SAT MAY 11 2013

NJC005-112040-
/O.CAN.KPHI.SV.W.0012.000000T0000Z-130511T2100Z/
BURLINGTON NJ-
430 PM EDT SAT MAY 11 2013

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BURLINGTON COUNTY IS
CANCELLED...

LAT...LON 3985 7444 3973 7473 3979 7481 3978 7487
      3980 7491 3984 7492 4007 7469 3994 7448
TIME...MOT...LOC 2030Z 227DEG 30KT 3983 7470

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 2:03 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	117 min
May 11, 2:24 PM EDT	Special Weather Statement	PHI	Hunterdon	36 min
May 11, 2:44 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	2 hr
May 11, 2:49 PM EDT	Special Weather Statement	PHI	Hunterdon, Somerset	41 min
May 11, 3:03 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	42 min
May 11, 3:15 PM EDT	Special Weather Statement	PHI	Camden, Cumberland, Gloucester	60 min
May 11, 3:37 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	3 hr
May 11, 3:44 PM EDT	Small Craft Advisory	PHI		24 hr
May 11, 4:13 PM EDT	Special Weather Statement	PHI	Monmouth, Ocean	62 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.