Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 200, NWS Philadelphia/Mount Holly

August 17, 2007Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2007, 3:05 PM EDT for Gloucester County, New Jersey. It was in force for 55 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, 3:05 PM EDT (19:05 UTC)
Expired
Aug 17, 2007, 4:00 PM EDT
In force
55 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Gloucester County, NJ

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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.1 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2007-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 207 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, Wallops Is Stn, VA at 12:00Z on 2007-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 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
207 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
1260 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 171905
SVRPHI
NJC015-172000-
/O.NEW.KPHI.SV.W.0200.070817T1905Z-070817T2000Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 400 PM EDT

* AT 304 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BECKETT...OR ABOUT 9 MILES SOUTH OF SPRINGFIELD...AND MOVING EAST
  AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GIBBSTOWN BY 310 PM EDT...
  MULLICA HILL BY 320 PM EDT...
  TURNERSVILLE AND GLASSBORO BY 330 PM EDT...
  CLAYTON BY 335 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 3980 7542 3985 7535 3985 7528 3979 7507
      3978 7509 3977 7507 3957 7497 3963 7516
      3966 7520 3968 7532 3971 7536 3976 7540
      3977 7543
TIME...MOT...LOC 1905Z 284DEG 30KT 3979 7535

$$

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, 3:17 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, 5:41 PM EDTSevere Thunderstorm WarningPHIMorris64 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.