Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 195, NWS Philadelphia/Mount Holly

August 17, 2007Warren County, New Jersey; Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2007, 2:20 PM EDT for Warren County, New Jersey; Northampton County, Pennsylvania. It was in force for 70 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: Aug 17, 2007, 2:20 PM EDT (18:20 UTC)
Expired: Aug 17, 2007, 3:30 PM EDT
In force: 70 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Warren County, NJ, Northampton County, PA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 17, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.3 hours before the alert went out and 202 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: 120 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 1465 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 171820
SVRPHI
NJC041-PAC095-171930-
/O.NEW.KPHI.SV.W.0195.070817T1820Z-070817T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
220 PM EDT FRI AUG 17 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF BETHLEHEM...
  EXTREME SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 330 PM EDT

* AT 212 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR BETHLEHEM...AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OLD ORCHARD AND WILSON BY 225 PM EDT...
  EASTON BY 230 PM EDT...

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.

HAIL UP TO PENNY SIZED HAS BEEN REPORTED IN BETHLEHEM WITH THIS 
STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION 
TO PROTECT LIFE AND PROPERTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

LAT...LON 4069 7519 4061 7515 4058 7519 4060 7519
      4062 7520 4057 7529 4056 7535 4070 7544
TIME...MOT...LOC 1820Z 264DEG 27KT 4062 7530

$$

RNS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 10:32 PM EDT	Special Marine Warning	PHI		43 min
Aug 16, 11:12 PM EDT	Special Marine Warning	PHI		63 min
Aug 16, 11:27 PM EDT	Special Marine Warning	PHI		48 min
Aug 16, 11:36 PM EDT	Special Marine Warning	PHI		39 min
Aug 17, 12:29 AM EDT	Special Marine Warning	PHI		46 min
Aug 17, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	62 min
Aug 17, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	55 min
Aug 17, 3:17 PM EDT	Tornado Warning	PHI	Warren	43 min
Aug 17, 3:20 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	55 min
Aug 17, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	69 min
Aug 17, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris	49 min
Aug 17, 3:59 PM EDT	Special Marine Warning	PHI		2 hr
Aug 17, 4:09 PM EDT	Severe Thunderstorm Warning	PHI	Camden	36 min
Aug 17, 4:11 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	49 min
Aug 17, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Warren	60 min
Aug 17, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	58 min
Aug 17, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Morris	64 min
Aug 17, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	59 min
Aug 17, 6:27 PM EDT	Special Marine Warning	PHI		93 min
Aug 17, 6:40 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	35 min
Aug 17, 7:47 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	58 min
Aug 17, 1:48 PM EDT	Severe Thunderstorm Warning	PHI	Chester	72 min
Aug 17, 2:07 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	68 min
Aug 17, 2:14 PM EDT	Tornado Warning	PHI	Chester	46 min
Aug 17, 2:19 PM EDT	Tornado Warning	PHI	Carbon	26 min
Aug 17, 2:36 PM EDT	Severe Thunderstorm Warning	PHI	Delaware	54 min
Aug 17, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	79 min
Aug 17, 2:45 PM EDT	Tornado Warning	PHI	Carbon, Northampton	45 min
Aug 17, 2:54 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh	66 min
Aug 17, 4:42 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	19 min
Aug 17, 4:51 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	43 min
Aug 17, 7:56 PM EDT	Severe Thunderstorm Warning	PHI	Montgomery	19 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2007 Severe Thunderstorm Warnings in Pennsylvania, 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; the sounding from the Mesonet's radiosonde archive.