Alert archive / New Jersey / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 130, NWS Philadelphia/Mount Holly

August 16, 20105 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 16, 2010, 4:31 PM EDT for 5 counties in New Jersey. It was in force for 59 min. 4 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
Aug 16, 2010, 4:31 PM EDT (20:31 UTC)
Expired
Aug 16, 2010, 5:30 PM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 47 km from the middle of the area, began a volume at 20:34 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
Aug 16, 4:40 PM EDTTSTM WND DMG3 Nw Princeton Junction, NJNUMEROUS TREES DOWN IN PRINCETON.
Aug 16, 4:55 PM EDTTSTM WND DMG3 Ene Princeton Junctio, NJNUMEROUS TREES DOWN IN PLAINSBORO.
Aug 16, 5:05 PM EDTTSTM WND DMG3 W Concordia, NJLARGE TREE LIMBS DOWN IN CRANBURY TOWNSHIP.
Aug 16, 5:25 PM EDTTSTM WND DMG2 Sse Concordia, NJLARGE TREE LIMBS DOWN AND PENNY SIZE HAIL REPORTED IN MONROE TOWNSHIP.

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
Aug 16, 12:05 PM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.5 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2010-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2010-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 square meters per square second.193958Sfc1 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
82 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
548 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
242 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

817 
WUUS51 KPHI 162031
SVRPHI
NJC019-021-023-025-035-162130-
/O.NEW.KPHI.SV.W.0130.100816T2031Z-100816T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
431 PM EDT MON AUG 16 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MERCER COUNTY IN CENTRAL NEW JERSEY...
  WESTERN MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  SOUTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  SOUTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  SOUTHEASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 530 PM EDT

* AT 430 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
  HOPEWELL...OR 11 MILES NORTH OF TRENTON...AND MOVING EAST AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PRINCETON AND ROCKY HILL AROUND 445 PM EDT...
  KENDALL PARK AROUND 500 PM EDT...
  SOUTH BRUNSWICK AROUND 505 PM EDT...
  DAYTON AROUND 510 PM EDT...
  JAMESBURG AND CLEARBROOK PARK AROUND 520 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT MONDAY
EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4044 7419 4017 7426 4031 7487 4049 7483
TIME...MOT...LOC 2031Z 281DEG 16KT 4038 7473

$$

PO
1 follow-up statement
106 
WWUS51 KPHI 162108
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
508 PM EDT MON AUG 16 2010

NJC019-021-035-162117-
/O.CAN.KPHI.SV.W.0130.000000T0000Z-100816T2130Z/
HUNTERDON NJ-SOMERSET NJ-MERCER NJ-
508 PM EDT MON AUG 16 2010

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MERCER...SOUTHERN
SOMERSET AND SOUTHEASTERN HUNTERDON COUNTIES IS CANCELLED...

THE SEVERE STORM IS NOW IN SOUTHERN MIDDLESEX COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT MONDAY
EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 4017 7426 4032 7463 4033 7463 4041 7453
      4044 7419
TIME...MOT...LOC 2107Z 293DEG 17KT 4031 7451

$$

NJC023-025-162130-
/O.CON.KPHI.SV.W.0130.000000T0000Z-100816T2130Z/
MIDDLESEX NJ-MONMOUTH NJ-
508 PM EDT MON AUG 16 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR WESTERN MONMOUTH AND SOUTHERN MIDDLESEX COUNTIES...

AT 505 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS TO 60 MPH.  THIS STORM WAS
LOCATED NEAR ROSSMOOR...OR 12 MILES SOUTH OF NEW BRUNSWICK...MOVING
SOUTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  CLEARBROOK PARK...CONCORDIA...JAMESBURG AND 6 MILES SOUTHWEST OF
  HELMETTA BY 515 PM EDT...
  8 MILES SOUTHWEST OF SPOTSWOOD BY 520 PM EDT...
  MANALAPAN BY 525 PM EDT...
  ENGLISHTOWN...YORKETOWN...WEST FREEHOLD AND 6 MILES WEST OF
  FREEHOLD BY 530 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.
 
&&

LAT...LON 4017 7426 4032 7463 4033 7463 4041 7453
      4044 7419
TIME...MOT...LOC 2107Z 293DEG 17KT 4031 7451

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 3:03 PM EDTSpecial Weather StatementPHIHunterdon57 min
Aug 16, 3:12 PM EDTSevere Thunderstorm WarningPHIHunterdon27 min
Aug 16, 4:27 PM EDTSpecial Weather StatementPHIMercer, Middlesex63 min
Aug 16, 5:28 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth48 min
Aug 16, 5:30 PM EDTSpecial Marine WarningPHI59 min
Aug 16, 7:45 PM EDTSpecial Weather StatementPHIGloucester, Salem60 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2010Every severe thunderstorm warning in 2010

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.