Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 234, NWS Philadelphia/Mount Holly

October 11, 2007Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 11, 2007, 3:07 PM EDT for Middlesex County, New Jersey. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 11, 2007, 3:07 PM EDT (19:07 UTC)
Expired
Oct 11, 2007, 3:45 PM EDT
In force
38 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 58 km from the middle of the area, began a volume at 19:10 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.1 hours before the alert went out and 128 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 2007-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 2007-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 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
6 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
110 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 111908
SVRPHI
NJC023-111945-
/O.NEW.KPHI.SV.W.0234.071011T1907Z-071011T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
307 PM EDT THU OCT 11 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...PERTH AMBOY...NEW BRUNSWICK...

* UNTIL 345 PM EDT

* AT 306 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR OLD BRIDGE...OR
  ABOUT 6 MILES SOUTHEAST OF NEW BRUNSWICK...AND MOVING NORTHEAST AT
  25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SAYREVILLE BY 315 PM EDT...
  EDISON BY 320 PM EDT...
  PERTH AMBOY BY 325 PM EDT...

IN ADDITION TO SMALL HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO 
GROUND LIGHTNING AND VERY HEAVY RAIN 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.

LAT...LON 4042 7425 4041 7425 4036 7430 4041 7453
      4060 7437 4055 7424 4053 7423 4049 7426
      4047 7426 4046 7423 4044 7422
TIME...MOT...LOC 1907Z 205DEG 22KT 4044 7435

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 11, 3:48 AM EDTSpecial Marine WarningPHI57 min
Oct 11, 4:15 AM EDTTornado WarningPHICumberland30 min
Oct 11, 4:47 AM EDTSpecial Marine WarningPHI88 min
Oct 11, 6:15 AM EDTSpecial Marine WarningPHI45 min
Oct 11, 6:18 AM EDTSpecial Marine WarningPHI27 min
Oct 11, 2:22 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth38 min
Oct 11, 2:31 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Warren44 min
Oct 11, 3:14 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex61 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.