Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 198, NWS Philadelphia/Mount Holly

August 2, 20085 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 2, 2008, 12:06 PM EDT for 5 counties in New Jersey. It was in force for 54 min. 3 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 2, 2008, 12:06 PM EDT (16:06 UTC)
Expired
Aug 2, 2008, 1:00 PM EDT
In force
54 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), 52 km from the middle of the area, began a volume at 16:09 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 2, 12:19 PM EDTTSTM WND DMGHopewell, NJTREE DOWN IN HOPEWELL TWP.
Aug 2, 12:23 PM EDTTSTM WND DMG5 N Princeton, NJTREE DOWN IN MONTGOMERY TWP.
Aug 2, 12:28 PM EDTHAIL 0.25Kendall Park, NJPEA SIZE HAIL IN KENDALL PARK.

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 2, 10:39 AM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 4.1 hours before the alert went out and 150 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 2008-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 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 2008-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 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
84 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1436 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
65 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.

000 
WUUS51 KPHI 021606
SVRPHI
NJC019-021-023-025-035-021700-
/O.NEW.KPHI.SV.W.0198.080802T1606Z-080802T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1206 PM EDT SAT AUG 2 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 100 PM EDT

* AT 1204 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  HOPEWELL...OR ABOUT 12 MILES NORTH OF TRENTON...AND MOVING EAST AT
  28 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PRINCETON BY 1215 PM...
  ROCKY HILL BY 1220 PM...
  SOUTH BRUNSWICK AND KENDALL PARK BY 1230 PM...
  DAYTON BY 1235 PM...
  NORTH BRUNSWICK AND JAMESBURG BY 1240 PM...
  EAST BRUNSWICK AND NEW BRUNSWICK BY 1245 PM...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM SATURDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA.

LAT...LON 4030 7430 4031 7491 4035 7491 4039 7481
      4041 7479 4042 7475 4040 7475 4054 7425
      4053 7423 4047 7426 4044 7422
TIME...MOT...LOC 1606Z 266DEG 24KT 4040 7476

$$

MPD
1 follow-up statement
000 
WWUS51 KPHI 021632
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1232 PM EDT SAT AUG 2 2008

NJC019-021641-
/O.CAN.KPHI.SV.W.0198.000000T0000Z-080802T1700Z/
HUNTERDON NJ-
1231 PM EDT SAT AUG 2 2008

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTH CENTRAL
HUNTERDON COUNTY IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEASTERN PENNSYLVANIA.

TREES AND WIRES WERE REPORTED DOWN IN MILFORD AND HOLLAND TOWNSHIPS 
WITH THE STORM. 

LAT...LON 4030 7430 4031 7472 4035 7465 4040 7462
      4041 7463 4043 7463 4054 7425 4053 7423
      4047 7426 4043 7422
TIME...MOT...LOC 1631Z 266DEG 24KT 4041 7454

$$

NJC021-023-025-035-021700-
/O.CON.KPHI.SV.W.0198.000000T0000Z-080802T1700Z/
SOMERSET NJ-MERCER NJ-MIDDLESEX NJ-MONMOUTH NJ-
1231 PM EDT SAT AUG 2 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM EDT
FOR NORTH CENTRAL MONMOUTH...CENTRAL MIDDLESEX...NORTH CENTRAL MERCER
AND SOUTHEASTERN SOMERSET COUNTIES...

AT 1228 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR KENDALL PARK...OR 8 MILES SOUTHWEST OF NEW BRUNSWICK...
MOVING EAST AT 28 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORTH BRUNSWICK...JAMESBURG AND ROSSMOOR BY 1240 PM EDT...
  EAST BRUNSWICK...MILLTOWN...HELMETTA AND NEW BRUNSWICK BY 1245 PM
  EDT...
  SPOTSWOOD AND SOUTH RIVER BY 1250 PM EDT...
  MADISON PARK BY 1255 PM EDT...

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 NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

DAMAGING WINDS THAT DOWNED TREES AND WIRES IN HUNTERDON COUNTY WERE 
REPORTED WITH THIS STORM. THIS IS A DANGEROUS STORM...SEEK SAFE 
SHELTER AND STAY AWAY FROM WINDOWS

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEASTERN PENNSYLVANIA.

LAT...LON 4030 7430 4031 7472 4035 7465 4040 7462
      4041 7463 4043 7463 4054 7425 4053 7423
      4047 7426 4043 7422
TIME...MOT...LOC 1631Z 266DEG 24KT 4041 7454

$$

MPD

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 6:55 AM EDTSpecial Marine WarningPHI65 min
Aug 2, 7:20 AM EDTSpecial Marine WarningPHI115 min
Aug 2, 7:40 AM EDTSevere Thunderstorm WarningPHICape May65 min
Aug 2, 8:08 AM EDTSevere Thunderstorm WarningPHIAtlantic52 min
Aug 2, 8:31 AM EDTSpecial Marine WarningPHI119 min
Aug 2, 9:22 AM EDTSpecial Marine WarningPHI24 min
Aug 2, 10:51 AM EDTAreal Flood AdvisoryPHISussex, Warren3 hr
Aug 2, 11:31 AM EDTSevere Thunderstorm WarningPHIHunterdon, Somerset59 min
Aug 2, 12:54 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth66 min
Aug 2, 1:22 PM EDTSpecial Marine WarningPHI53 min
Aug 2, 4:35 PM EDTSevere Thunderstorm WarningPHIBurlington55 min
Aug 2, 5:40 PM EDTSevere Thunderstorm WarningPHIOcean65 min
Aug 2, 5:50 PM EDTSevere Thunderstorm WarningPHIWarren55 min
Aug 2, 5:58 PM EDTSpecial Marine WarningPHI62 min
Aug 2, 6:19 PM EDTSevere Thunderstorm WarningPHISussex, Warren56 min
Aug 2, 6:35 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset, Warren26 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2008Every severe thunderstorm warning in 2008

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.