Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 210, NWS Philadelphia/Mount Holly

August 17, 2007Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2007, 5:41 PM EDT for Morris County, New Jersey. It was in force for 64 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, 5:41 PM EDT (21:41 UTC)
Expired
Aug 17, 2007, 6:45 PM EDT
In force
64 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Morris County, NJ

The radar

The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 21:52 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 watch it was issued in

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

IssuedProductOfficeLasted
Aug 17, 1:37 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.7 hours before the alert went out and 149 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 2007-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 120 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 12:00Z on 2007-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.1939587897Sfc1 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
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 172140
SVRPHI
NJC027-172245-
/O.NEW.KPHI.SV.W.0210.070817T2141Z-070817T2245Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MORRIS COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 645 PM EDT

* AT 539 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED NEAR LONG VALLEY...OR ABOUT
  25 MILES NORTHWEST OF NEW BRUNSWICK...AND MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  9 MILES SOUTH OF SUCCASUNNA BY 545 PM EDT...
  MILLINGTON BY 555 PM EDT...
  6 MILES SOUTH OF MORRISTOWN BY 600 PM EDT...
  MADISON BY 605 PM EDT...

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

LAT...LON 4068 7443 4065 7449 4066 7453 4070 7451
      4075 7456 4071 7474 4073 7476 4073 7482
      4078 7488 4083 7482 4087 7480 4091 7434
TIME...MOT...LOC 2141Z 275DEG 41KT 4073 7476

$$

JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 10:32 PM EDTSpecial Marine WarningPHI43 min
Aug 16, 11:12 PM EDTSpecial Marine WarningPHI63 min
Aug 16, 11:27 PM EDTSpecial Marine WarningPHI48 min
Aug 16, 11:36 PM EDTSpecial Marine WarningPHI39 min
Aug 17, 12:29 AM EDTSpecial Marine WarningPHI46 min
Aug 17, 2:20 PM EDTSevere Thunderstorm WarningPHIWarren70 min
Aug 17, 2:43 PM EDTSevere Thunderstorm WarningPHIHunterdon62 min
Aug 17, 3:05 PM EDTSevere Thunderstorm WarningPHIGloucester55 min
Aug 17, 3:17 PM EDTTornado WarningPHIWarren43 min
Aug 17, 3:20 PM EDTSevere Thunderstorm WarningPHISomerset55 min
Aug 17, 3:36 PM EDTSevere Thunderstorm WarningPHIMiddlesex69 min
Aug 17, 3:46 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris49 min
Aug 17, 3:59 PM EDTSpecial Marine WarningPHI2 hr
Aug 17, 4:09 PM EDTSevere Thunderstorm WarningPHICamden36 min
Aug 17, 4:11 PM EDTSevere Thunderstorm WarningPHIMonmouth49 min
Aug 17, 4:45 PM EDTSevere Thunderstorm WarningPHIWarren60 min
Aug 17, 5:17 PM EDTSevere Thunderstorm WarningPHIHunterdon58 min
Aug 17, 5:46 PM EDTSevere Thunderstorm WarningPHISomerset59 min
Aug 17, 6:27 PM EDTSpecial Marine WarningPHI93 min
Aug 17, 6:40 PM EDTSevere Thunderstorm WarningPHIMonmouth35 min
Aug 17, 7:47 PM EDTSevere Thunderstorm WarningPHIMonmouth58 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.