Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 148, NWS Philadelphia/Mount Holly

July 28, 2012Mercer County, Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2012, 9:24 PM EDT for Mercer County, Middlesex County, Monmouth County, New Jersey. It was in force for 66 min. 18 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 28, 2012, 9:24 PM EDT (01:24 UTC)
Expired
Jul 28, 2012, 10:30 PM EDT
In force
66 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 43 km from the middle of the area, began a volume at 01:25 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

TimeReportWhereRemark
Jul 28, 9:27 PM EDTHAIL 0.88Princeton Junction, NJ
Jul 28, 9:29 PM EDTHAIL 0.75Lawrence Twp, NJ
Jul 28, 9:29 PM EDTHAIL 0.88Princeton Junction, NJ
Jul 28, 9:30 PM EDTHAIL 0.5Lawrenceville, NJ
Jul 28, 9:33 PM EDTTSTM WND DMGHightstown, NJLARGE BRANCHES BROKEN
Jul 28, 9:35 PM EDTTSTM WND DMGEast Windsor Twp, NJEXTENSIVE CROP DAMAGE
Jul 28, 9:36 PM EDTHAIL 1Princeton Junction, NJ
Jul 28, 9:37 PM EDTTSTM WND DMGCranbury Twp, NJTREES DOWN IN CRANBURY TWP. WINDS ESTIMATED AT 60 MPH.
Jul 28, 9:38 PM EDTTSTM WND DMGHightstown, NJTREES DOWN
Jul 28, 9:53 PM EDTHAIL 0.88Princeton Junction, NJTIME EST..MAY HAVE OCCURRED BETWEEN 930-938P.
Jul 28, 10:00 PM EDTTSTM WND DMGEast Freehold, NJMULTIPLE LARGE TREES DOWN
Jul 28, 10:10 PM EDTHAIL 0.5Marlboro, NJ
Jul 28, 10:15 PM EDTHAIL 0.75Marlboro, NJ
Jul 28, 10:19 PM EDTTSTM WND DMG4 W Freehold, NJTREES DOWN
Jul 28, 10:19 PM EDTTSTM WND DMGFreehold, NJTREES DOWN
Jul 28, 10:20 PM EDTTSTM WND DMGLawrence, NJTREE DOWN RT206ATPRINCETON PIKE
Jul 28, 10:23 PM EDTTSTM WND DMGFreehold, NJLARGE BRANCHES BROKEN
Jul 28, 10:31 PM EDTTSTM WND DMGFreehold, NJTREE ON TOP OF CAR

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.

IssuedProductOfficeLasted
Jul 28, 1:36 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.4 hours before the alert went out and 151 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-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2012-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 69 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2012-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
69 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
656 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
20 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.

209 
WUUS51 KPHI 290124
SVRPHI
NJC021-023-025-290230-
/O.NEW.KPHI.SV.W.0148.120729T0124Z-120729T0230Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MERCER COUNTY IN CENTRAL NEW JERSEY...
  CENTRAL MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  SOUTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 1030 PM EDT

* AT 920 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
  EDINBURG...OR 7 MILES NORTHEAST OF TRENTON...AND MOVING EAST AT 25
  MPH.

  THIS STORM HAS A HISTORY OF PRODUCING WIND GUSTS IN EXCESS OF 60 
  MPH IN TRENTON.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WINDSOR AROUND 930 PM EDT...
  HIGHTSTOWN AROUND 935 PM EDT...
  TWIN RIVERS AND CLEARBROOK PARK AROUND 940 PM EDT...
  ROOSEVELT AROUND 945 PM EDT...
  MANALAPAN AND CLARKSBURG AROUND 950 PM EDT...
  YORKETOWN AROUND 955 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.

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 4015 7413 4022 7476 4039 7473 4038 7471
      4039 7464 4039 7462 4038 7461 4040 7458
      4039 7411
TIME...MOT...LOC 0124Z 281DEG 24KT 4029 7463

$$

HAYES
3 follow-up statements
101 
WWUS51 KPHI 290141
SVSPHI

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

NJC021-023-025-290230-
/O.CON.KPHI.SV.W.0148.000000T0000Z-120729T0230Z/
MERCER NJ-MIDDLESEX NJ-MONMOUTH NJ-
941 PM EDT SAT JUL 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR CENTRAL MONMOUTH...SOUTHERN MIDDLESEX AND EASTERN MERCER
COUNTIES...

AT 937 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 HIGHTSTOWN...OR 13 MILES EAST OF TRENTON...MOVING EAST
AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MANALAPAN AND CLARKSBURG BY 950 PM EDT...
  ENGLISHTOWN AND YORKETOWN BY 955 PM EDT...
  WEST FREEHOLD AND FREEHOLD BY 1005 PM EDT...
  ADELPHIA...EAST FREEHOLD AND FREEWOOD ACRES BY 1010 PM EDT...
  HOWELL BY 1015 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.

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 4015 7413 4021 7466 4039 7462 4038 7462
      4038 7461 4040 7458 4039 7411
TIME...MOT...LOC 0142Z 281DEG 24KT 4026 7448

$$

HAYES
951 
WWUS51 KPHI 290212
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1012 PM EDT SAT JUL 28 2012

NJC021-290222-
/O.CAN.KPHI.SV.W.0148.000000T0000Z-120729T0230Z/
MERCER NJ-
1012 PM EDT SAT JUL 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MERCER 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 4015 7413 4018 7441 4020 7453 4023 7452
      4025 7448 4027 7448 4028 7451 4039 7450
      4039 7411
TIME...MOT...LOC 0212Z 281DEG 24KT 4022 7422

$$

NJC023-025-290230-
/O.CON.KPHI.SV.W.0148.000000T0000Z-120729T0230Z/
MIDDLESEX NJ-MONMOUTH NJ-
1012 PM EDT SAT JUL 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR CENTRAL MONMOUTH AND SOUTHERN MIDDLESEX COUNTIES...

AT 1007 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 ADELPHIA...OR 19 MILES NORTH OF TOMS 
RIVER...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  FARMINGDALE AND COLLINGWOOD PARK BY 1020 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 4015 7413 4018 7441 4020 7453 4023 7452
      4025 7448 4027 7448 4028 7451 4039 7450
      4039 7411
TIME...MOT...LOC 0212Z 281DEG 24KT 4022 7422

$$

HAYES
464 
WWUS51 KPHI 290227
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1027 PM EDT SAT JUL 28 2012

NJC023-025-290237-
/O.EXP.KPHI.SV.W.0148.000000T0000Z-120729T0230Z/
MIDDLESEX NJ-MONMOUTH NJ-
1027 PM EDT SAT JUL 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MONMOUTH AND SOUTHERN
MIDDLESEX COUNTIES WILL EXPIRE AT 1030 PM EDT...

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 4015 7413 4018 7441 4020 7453 4023 7452
      4025 7448 4027 7448 4028 7451 4039 7450
      4039 7411
TIME...MOT...LOC 0227Z 281DEG 24KT 4020 7409

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 8:02 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer2 hr
Jul 28, 8:05 PM EDTSevere Thunderstorm WarningPHIHunterdon55 min
Jul 28, 8:11 PM EDTSpecial Marine WarningPHI64 min
Jul 28, 8:26 PM EDTAreal Flood AdvisoryPHIMercer101 min
Jul 28, 8:38 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Somerset67 min
Jul 28, 8:41 PM EDTSpecial Weather StatementPHIGloucester, Salem64 min
Jul 28, 8:43 PM EDTSpecial Marine WarningPHI62 min
Jul 28, 9:14 PM EDTSpecial Marine WarningPHI61 min
Jul 28, 9:21 PM EDTSevere Thunderstorm WarningPHICape May23 min
Jul 28, 9:42 PM EDTSpecial Marine WarningPHI63 min
Jul 28, 9:46 PM EDTSpecial Weather StatementPHIBurlington, Ocean59 min
Jul 28, 9:52 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth118 min
Jul 28, 9:52 PM EDTSpecial Weather StatementPHICamden53 min
Jul 28, 10:09 PM EDTSpecial Marine WarningPHI66 min
Jul 28, 10:23 PM EDTSevere Thunderstorm WarningPHIMonmouth32 min
Jul 28, 10:31 PM EDTSpecial Marine WarningPHI59 min
Jul 28, 10:39 PM EDTSpecial Weather StatementPHIOcean66 min
Jul 29, 12:22 AM EDTSpecial Marine WarningPHI23 min
Jul 29, 1:20 PM EDTSpecial Weather StatementPHIAtlantic55 min
Jul 29, 1:42 PM EDTAreal Flood AdvisoryPHICape May2 hr
Jul 29, 2:59 PM EDTSpecial Weather StatementPHICape May61 min
Jul 29, 3:35 PM EDTSpecial Weather StatementPHIAtlantic55 min
Jul 29, 4:41 PM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset64 min
Jul 29, 5:53 PM EDTSpecial Weather StatementPHIMiddlesex52 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012Every 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.