Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 133, NWS Philadelphia/Mount Holly

July 28, 20124 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2012, 12:55 PM EDT for 4 counties in New Jersey. It was in force for 48 min. 1 report 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 28, 2012, 12:55 PM EDT (16:55 UTC)
Expired: Jul 28, 2012, 1:43 PM EDT
In force: 48 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 40 km from the middle of the area, began a volume at 16:58 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 28, 1:02 PM EDT	TSTM WND DMG	West Windsor Twp, NJ	TREE DOWN IN WEST WINDSOR TWP.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 4.9 hours before the alert went out and 161 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: 424 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 705 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

476 
WUUS51 KPHI 281655
SVRPHI
NJC021-023-025-035-281800-
/O.NEW.KPHI.SV.W.0133.120728T1655Z-120728T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1255 PM EDT SAT JUL 28 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF TRENTON...
  WEST CENTRAL MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  SOUTHWESTERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  SOUTHWESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 200 PM EDT

* AT 1253 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
  LAWRENCEVILLE...OR NEAR TRENTON...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MERCERVILLE-HAMILTON SQUARE AROUND 105 PM EDT...
  PRINCETON AROUND 115 PM EDT...
  EDINBURG AROUND 125 PM EDT...
  WINDSOR AROUND 130 PM EDT...
  HIGHTSTOWN AND SOUTH BRUNSWICK AROUND 150 PM EDT...
  TWIN RIVERS AROUND 155 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.

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 4020 7432 4018 7475 4021 7477 4026 7485
      4037 7486 4047 7436
TIME...MOT...LOC 1655Z 262DEG 10KT 4030 7473

$$

HAYES

3 follow-up statements

998 
WWUS51 KPHI 281710
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
110 PM EDT SAT JUL 28 2012

NJC035-281720-
/O.CAN.KPHI.SV.W.0133.000000T0000Z-120728T1800Z/
SOMERSET NJ-
110 PM EDT SAT JUL 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SOMERSET COUNTY
IS CANCELLED...

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 4020 7432 4019 7451 4019 7468 4027 7474
      4038 7475 4039 7473 4038 7471 4039 7464
      4038 7461 4040 7459 4042 7458 4047 7437
TIME...MOT...LOC 1710Z 262DEG 10KT 4030 7468

$$

NJC021-023-025-281800-
/O.CON.KPHI.SV.W.0133.000000T0000Z-120728T1800Z/
MERCER NJ-MIDDLESEX NJ-MONMOUTH NJ-
110 PM EDT SAT JUL 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR WEST CENTRAL MONMOUTH...SOUTHWESTERN MIDDLESEX AND EASTERN MERCER
COUNTIES...

AT 106 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 LAWRENCEVILLE...OR 7 MILES NORTHEAST OF TRENTON...MOVING
EAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PRINCETON BY 115 PM EDT...
  PRINCETON NORTH BY 120 PM EDT...
  PRINCETON JUNCTION AND EDINBURG BY 125 PM EDT...
  WINDSOR BY 130 PM EDT...
  HEATHCOTE BY 140 PM EDT...
  HIGHTSTOWN...MONMOUTH JUNCTION AND SOUTH BRUNSWICK BY 150 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4020 7432 4019 7451 4019 7468 4027 7474
      4038 7475 4039 7473 4038 7471 4039 7464
      4038 7461 4040 7459 4042 7458 4047 7437
TIME...MOT...LOC 1710Z 262DEG 10KT 4030 7468

$$

HAYES

156 
WWUS51 KPHI 281726
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
126 PM EDT SAT JUL 28 2012

NJC021-023-025-281800-
/O.CON.KPHI.SV.W.0133.000000T0000Z-120728T1800Z/
MERCER NJ-MIDDLESEX NJ-MONMOUTH NJ-
126 PM EDT SAT JUL 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR WEST CENTRAL MONMOUTH...SOUTHWESTERN MIDDLESEX AND EASTERN MERCER
COUNTIES...

AT 123 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR HIGHTSTOWN...OR 12 MILES EAST OF
TRENTON...MOVING EAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TWIN RIVERS AND ROOSEVELT BY 135 PM EDT...
  CONCORDIA...CLEARBROOK PARK AND ROSSMOOR BY 145 PM EDT...
  CONCORDIA BY 150 PM EDT...
  MANALAPAN AND 6 MILES SOUTH OF JAMESBURG BY 155 PM EDT...
  ENGLISHTOWN BY 200 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4027 7469 4038 7461 4038 7457 4039 7453
      4042 7437 4020 7432 4019 7451 4019 7459
TIME...MOT...LOC 1726Z 262DEG 10KT 4025 7452

$$

HAYES

524 
WWUS51 KPHI 281743
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
143 PM EDT SAT JUL 28 2012

NJC021-023-025-281753-
/O.CAN.KPHI.SV.W.0133.000000T0000Z-120728T1800Z/
MERCER NJ-MIDDLESEX NJ-MONMOUTH NJ-
143 PM EDT SAT JUL 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MONMOUTH...
SOUTHWESTERN MIDDLESEX AND EASTERN MERCER COUNTIES IS CANCELLED...

THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND ARE NO LONGER 
EXPECTED TO PRODUCE SEVERE WEATHER.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4027 7469 4038 7461 4038 7457 4039 7453
      4042 7437 4020 7432 4019 7451 4019 7459
TIME...MOT...LOC 1743Z 262DEG 10KT 4026 7446

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 11:45 AM EDT	Special Weather Statement	PHI	Burlington, Camden	90 min
Jul 28, 11:47 AM EDT	Special Weather Statement	PHI	Monmouth	58 min
Jul 28, 12:21 PM EDT	Special Weather Statement	PHI	Mercer	39 min
Jul 28, 12:30 PM EDT	Special Weather Statement	PHI	Ocean	60 min
Jul 28, 12:43 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	44 min
Jul 28, 12:47 PM EDT	Special Weather Statement	PHI	Cumberland	58 min
Jul 28, 12:50 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	55 min
Jul 28, 1:02 PM EDT	Special Marine Warning	PHI		58 min
Jul 28, 1:09 PM EDT	Special Weather Statement	PHI	Sussex	66 min
Jul 28, 1:20 PM EDT	Special Weather Statement	PHI	Ocean	55 min
Jul 28, 1:26 PM EDT	Areal Flood Advisory	PHI	Sussex	3 hr
Jul 28, 1:28 PM EDT	Special Marine Warning	PHI		62 min
Jul 28, 1:36 PM EDT	Special Weather Statement	PHI	Sussex	54 min
Jul 28, 1:41 PM EDT	Special Weather Statement	PHI	Monmouth	64 min
Jul 28, 1:52 PM EDT	Special Weather Statement	PHI	Morris	53 min
Jul 28, 2:03 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Jul 28, 2:08 PM EDT	Special Weather Statement	PHI	Sussex	67 min
Jul 28, 2:13 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex	3 hr
Jul 28, 2:13 PM EDT	Special Weather Statement	PHI	Cape May	62 min
Jul 28, 2:18 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden	3 hr
Jul 28, 2:26 PM EDT	Special Weather Statement	PHI	Morris	64 min
Jul 28, 2:28 PM EDT	Special Marine Warning	PHI		42 min
Jul 28, 2:37 PM EDT	Special Marine Warning	PHI		53 min
Jul 28, 2:48 PM EDT	Special Weather Statement	PHI	Burlington	57 min
Jul 28, 2:57 PM EDT	Special Weather Statement	PHI	Camden	63 min
Jul 28, 3:09 PM EDT	Special Weather Statement	PHI	Atlantic	66 min
Jul 28, 3:22 PM EDT	Special Weather Statement	PHI	Morris	53 min
Jul 28, 3:30 PM EDT	Special Weather Statement	PHI	Warren	60 min
Jul 28, 3:33 PM EDT	Areal Flood Advisory	PHI	Warren	81 min
Jul 28, 4:13 PM EDT	Special Marine Warning	PHI		62 min
Jul 28, 4:20 PM EDT	Special Weather Statement	PHI	Warren	55 min
Jul 28, 4:31 PM EDT	Special Weather Statement	PHI	Atlantic	59 min
Jul 28, 4:47 PM EDT	Flash Flood Warning	PHI	Warren	4 hr
Jul 28, 4:57 PM EDT	Special Weather Statement	PHI	Burlington	63 min
Jul 28, 5:04 PM EDT	Special Weather Statement	PHI	Somerset	56 min
Jul 28, 5:06 PM EDT	Special Weather Statement	PHI	Camden	54 min
Jul 28, 5:08 PM EDT	Special Marine Warning	PHI		67 min
Jul 28, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	38 min
Jul 28, 5:28 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Warren	3 hr
Jul 28, 5:32 PM EDT	Areal Flood Advisory	PHI	Atlantic	3 hr
Jul 28, 5:52 PM EDT	Special Weather Statement	PHI	Cumberland	53 min
Jul 28, 5:58 PM EDT	Special Weather Statement	PHI	Somerset	62 min
Jul 28, 6:03 PM EDT	Special Weather Statement	PHI	Warren	57 min
Jul 28, 6:05 PM EDT	Special Weather Statement	PHI	Atlantic	55 min
Jul 28, 6:06 PM EDT	Special Marine Warning	PHI		54 min
Jul 28, 6:18 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	57 min
Jul 28, 6:29 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	99 min
Jul 28, 6:34 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	56 min
Jul 28, 6:45 PM EDT	Special Weather Statement	PHI	Warren	60 min
Jul 28, 7:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 28, 7:24 PM EDT	Special Weather Statement	PHI	Atlantic	66 min
Jul 28, 7:32 PM EDT	Special Weather Statement	PHI	Atlantic	58 min
Jul 28, 7:40 PM EDT	Special Weather Statement	PHI	Warren	65 min
Jul 28, 7:56 PM EDT	Special Weather Statement	PHI	Hunterdon	64 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.