Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 163, NWS Philadelphia/Mount Holly

July 29, 2007Middlesex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2007, 12:23 PM EDT for Middlesex County, New Jersey. It was in force for 67 min. 1 report 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 29, 2007, 12:23 PM EDT (16:23 UTC)
Expired: Jul 29, 2007, 1:30 PM EDT
In force: 67 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Middlesex County, NJ

The radar

The Philadelphia radar (KDIX), 58 km from the middle of the area, began a volume at 16:26 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

Time	Report	Where	Remark
Jul 29, 1:10 PM EDT	NON-TSTM WND DMG	Woodbridge, NJ	WIRES REPORTED DOWNED ACROSS ROUTE 1 AT GREEN STREET IN WOODBRIDGE. MULTIPLE POWER OUTAGES ALSO REPORTED.

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 12:00Z, 4.4 hours before the alert went out and 136 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 593 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 8 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 291623
SVRPHI
NJC023-291730-
/O.NEW.KPHI.SV.W.0163.070729T1623Z-070729T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1223 PM EDT SUN JUL 29 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 130 PM EDT

* AT 1221 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR DAYTON...OR ABOUT 8 MILES SOUTH OF NEW
  BRUNSWICK...AND MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  7 MILES SOUTH OF NEW BRUNSWICK BY 1230 PM EDT...
  EAST BRUNSWICK BY 1235 PM EDT...
  OLD BRIDGE...SAYREVILLE AND 9 MILES SOUTH OF EDISON BY 1245 PM     
  EDT...7 MILES SOUTH OF PERTH AMBOY 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.

LAT...LON 4057 7440 4056 7451 4051 7444 4038 7462
      4030 7462 4027 7443 4044 7425 4043 7401
      4059 7422 4058 7447

$$

EBERWINE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 6:15 AM EDT	Special Marine Warning	PHI		90 min
Jul 29, 11:01 AM EDT	Severe Thunderstorm Warning	PHI	Cape May	59 min
Jul 29, 11:58 AM EDT	Severe Thunderstorm Warning	PHI	Somerset	62 min
Jul 29, 11:59 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	91 min
Jul 29, 12:52 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	53 min
Jul 29, 12:57 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	63 min
Jul 29, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	44 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2007 Every 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.