Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 185, NWS Philadelphia/Mount Holly

August 8, 2007Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 8, 2007, 4:12 AM EDT for Somerset County, New Jersey. It was in force for 51 min. 2 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 8, 2007, 4:12 AM EDT (08:12 UTC)
Expired
Aug 8, 2007, 5:03 AM EDT
In force
51 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 08:12 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 8, 4:35 AM EDTTSTM WND DMG3 N Flagtown, NJBRANCHBURG TWP. NUMEROUS TREES AND POLES DOWN, TREE TOPS SHEARED OFF.
Aug 8, 4:35 AM EDTTSTM WND DMG3 N Fleetwood, NJBRANCHBURG TWP. NUMEROUS TREES AND POLES DOWN, TREE TOPS SHEARED OFF. NWS FIELD SURVEY INDICATED STRAIGHT-LINE WINDS UP TO 70 MPH.

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 00:00Z, 8.2 hours before the alert went out and 154 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 2007-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 98 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 2007-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
98 J/kg
Mixed-layer CIN
-237 J/kg
Mixed-layer LCL
1372 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
30 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 080812
SVRPHI
NJC035-080915-
/O.NEW.KPHI.SV.W.0185.070808T0812Z-070808T0915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
412 AM EDT WED AUG 8 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 515 AM EDT

* AT 408 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THIS STORM WAS LOCATED 10 MILES WEST OF
  BRIDGEWATER...OR ABOUT 22 MILES WEST OF NEW BRUNSWICK...AND MOVING
  EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRIDGEWATER...FLAGTOWN...7 MILES SOUTH OF FAR HILLS AND 9 MILES
  SOUTH OF PEAPACK AND GLADSTONE BY 425 AM EDT...
  SOMERVILLE BY 430 AM EDT...
  MARTINSVILLE...MANVILLE AND MILLSTONE BY 435 AM EDT...
  BOUND BROOK BY 440 AM EDT...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 4050 7476 4055 7474 4057 7471 4060 7472
      4062 7471 4065 7474 4067 7472 4068 7473
      4072 7472 4074 7457 4058 7452 4054 7453
      4052 7451 4048 7450

$$

RNS
1 follow-up statement
000 
WWUS51 KPHI 080903
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
503 AM EDT WED AUG 8 2007

NJC035-080913-
/O.CAN.KPHI.SV.W.0185.000000T0000Z-070808T0915Z/
SOMERSET NJ-
503 AM EDT WED AUG 8 2007

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

THE THUNDERSTORM HAS WEAKENED AND MOVED EAST.

LAT...LON 4050 7476 4055 7474 4057 7471 4060 7472
      4062 7471 4065 7474 4067 7472 4068 7473
      4072 7472 4074 7457 4058 7452 4054 7453
      4052 7451 4048 7450

$$

RNS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 2:31 AM EDTSevere Thunderstorm WarningPHIWarren44 min
Aug 8, 3:28 AM EDTSevere Thunderstorm WarningPHIHunterdon, Warren62 min
Aug 8, 4:00 AM EDTTornado WarningPHIHunterdon30 min
Aug 8, 4:29 AM EDTTornado WarningPHISomerset31 min
Aug 8, 4:51 AM EDTSevere Thunderstorm WarningPHIMiddlesex37 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2007Every severe thunderstorm warning in 2007

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.