Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 10, NWS Philadelphia/Mount Holly

May 24, 2012Burlington County, Mercer County, New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 2012, 2:32 PM EDT for Burlington County, Mercer County, New Jersey; Bucks County, Pennsylvania. It was in force for 29 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 24, 2012, 2:32 PM EDT (18:32 UTC)
Expired: May 24, 2012, 3:01 PM EDT
In force: 29 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 28 km from the middle of the area, began a volume at 18:33 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.5 hours before the alert went out and 146 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: 302 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 6 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.

193 
WUUS51 KPHI 241832
SVRPHI
NJC005-021-PAC017-241930-
/O.NEW.KPHI.SV.W.0010.120524T1832Z-120524T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
232 PM EDT THU MAY 24 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL MERCER COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF TRENTON...
  SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  NORTH CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 330 PM EDT

* AT 229 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 13
  MILES WEST OF TRENTON...AND MOVING NORTHWEST AT 30 MPH. OTHERS
  STORMS FARTHER TO THE EAST NEAR TRENTON COULD ALSO BECOME SEVERE.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  MORRISVILLE...YARDVILLE-GROVEVILLE...MCGUIRE AFB AND FIELDSBORO

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.

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.

&&

LAT...LON 4004 7456 4002 7468 4022 7488 4025 7458
      4019 7458 4018 7459 4019 7461 4011 7457
TIME...MOT...LOC 1830Z 145DEG 24KT 4030 7500

$$

TFG

2 follow-up statements

781 
WWUS51 KPHI 241853
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
253 PM EDT THU MAY 24 2012

NJC005-021-PAC017-241903-
/O.CAN.KPHI.SV.W.0010.000000T0000Z-120524T1930Z/
MERCER NJ-BUCKS PA-BURLINGTON NJ-
253 PM EDT THU MAY 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BURLINGTON...
SOUTHEASTERN BUCKS AND SOUTH CENTRAL MERCER COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORMS HAVE MOVED NORTH OF THE WARNING AREA.


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.

LAT...LON 4004 7456 4002 7468 4022 7488 4025 7458
      4019 7458 4018 7459 4019 7461 4011 7457
TIME...MOT...LOC 1853Z 145DEG 24KT 4043 7512

$$

TFG

210 
WWUS51 KPHI 241901
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
301 PM EDT THU MAY 24 2012

NJC005-021-PAC017-241903-
/O.CAN.KPHI.SV.W.0010.000000T0000Z-120524T1930Z/
MERCER NJ-BUCKS PA-BURLINGTON NJ-
301 PM EDT THU MAY 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BURLINGTON...
SOUTHEASTERN BUCKS AND SOUTH CENTRAL MERCER COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORMS HAVE MOVED FARTHER NORTH.

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.

LAT...LON 4004 7456 4002 7468 4022 7488 4025 7458
      4019 7458 4018 7459 4019 7461 4011 7457
TIME...MOT...LOC 1853Z 145DEG 24KT 4043 7512

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 12:52 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	53 min
May 24, 1:06 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester	94 min
May 24, 1:18 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	38 min
May 24, 1:19 PM EDT	Special Weather Statement	PHI	Burlington	56 min
May 24, 1:27 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	48 min
May 24, 1:36 PM EDT	Areal Flood Advisory	PHI	Burlington	84 min
May 24, 1:47 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Monmouth	43 min
May 24, 1:50 PM EDT	Flash Flood Warning	PHI	Burlington	89 min
May 24, 2:01 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Mercer	83 min
May 24, 2:08 PM EDT	Severe Thunderstorm Warning	PHI	Mercer	52 min
May 24, 2:21 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Somerset	97 min
May 24, 2:36 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	54 min
May 24, 3:13 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	91 min
May 24, 3:38 PM EDT	Special Weather Statement	PHI	Hunterdon, Somerset	67 min
May 24, 4:23 PM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	97 min
May 24, 1:57 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	63 min
May 24, 2:26 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	64 min
May 24, 3:09 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	66 min
May 24, 3:16 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Lehigh, Northampton	59 min
May 24, 3:39 PM EDT	Areal Flood Advisory	PHI	Berks, Montgomery	57 min
May 24, 4:00 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	67 min
May 24, 4:07 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	83 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012 Severe Thunderstorm Warnings in Pennsylvania, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.