Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 122, NWS Philadelphia/Mount Holly

July 6, 2007Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2007, 5:00 PM EDT for Warren County, New Jersey. It was in force for 21 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 6, 2007, 5:00 PM EDT (21:00 UTC)
Expired: Jul 6, 2007, 5:21 PM EDT
In force: 21 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Warren County, NJ

The radar

The Philadelphia radar (KDIX), 107 km from the middle of the area, began a volume at 21:04 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 6, 5:00 PM EDT	HAIL 0.25	6 E Phillipsburg, NJ	PEA SIZE HAIL REPORTED IN THE STEWARTSVILLE AREA.

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, 9.0 hours before the alert went out and 189 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: 39 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -45 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 062101
SVRPHI
NJC041-062145-
/O.NEW.KPHI.SV.W.0122.070706T2100Z-070706T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
500 PM EDT FRI JUL 6 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 545 PM EDT

* AT 459 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ALPHA...OR ABOUT 11 MILES EAST OF BETHLEHEM...AND MOVING SOUTHEAST
  AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ALPHA BY 505 PM EDT...
  BLOOMSBURY BY 510 PM EDT...
  9 MILES SOUTHWEST OF HAMPTON BY 515 PM EDT...

LAW ENFORCEMENT REPORTED GOLFBALL SIZED HAIL NEAR PHILLIPSBURG.

LAT...LON 4073 7522 4061 7516 4070 7495 4087 7504
      4084 7506

$$

NIERENBERG

1 follow-up statement

000 
WWUS51 KPHI 062121
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
521 PM EDT FRI JUL 6 2007

NJC041-062129-
/O.CAN.KPHI.SV.W.0122.000000T0000Z-070706T2145Z/
WARREN NJ-
521 PM EDT FRI JUL 6 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WARREN COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORM HAS MOVED OUT OF WARREN COUNTY, THEREFORE 
THE WARNING HAS BEEN CANCELLED.

LAT...LON 4073 7522 4061 7516 4070 7495 4087 7504
      4084 7506

$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 12:34 AM EDT	Severe Thunderstorm Warning	PHI	Monmouth	56 min
Jul 6, 12:55 AM EDT	Special Marine Warning	PHI		65 min
Jul 6, 2:10 PM EDT	Excessive Heat Watch	PHI	Burlington, Camden, Gloucester, Mercer	48 hr
Jul 6, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	52 min
Jul 6, 5:27 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	48 min
Jul 6, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Mercer	49 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.